BMW Cooling System Parts & Accessories for BMW 3 Series E46 (1999-2005)

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The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

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E46 M3, Z4M ECS Tuning Aluminum Water Pump Pulley
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ECS - Corporate Logo
T#:367060
Part#: 002778ECS01
Ships on Dec 18, 2026
Sale - Save 10% $ 100.99

This product was last offered at the strikethrough price on
06-13-2026

$ 90.89 USD
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$ 100.99

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Most of the pulleys on your BMW engine are plastic, which become brittle and frail over time and from engine bay heat. A failed pulley could leave you stranded which is why it is vital to inspect the pulleys during routine maintenance. This is an aluminum version of the stock water pump pulley used on the S54 engine in the E46 M3, MZ3, and Z4M. It's the same size and uses the same hardware and the original belt as the stock plastic pulley. But the aluminum will last much longer.
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Geba - Corporate Logo
T#:348275
Part#: 11517838159
In Stock
$ 249.99 USD
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$ 249.99 USD
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The water pump in your vehicle keeps all that coolant flowing freely. If it begins to fail, overheating problems are inevitable. Don't take a chance on doing damage to engine internals by not replacing your water pump.
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Bav Auto Fan Clutch Wrench - 32mm
10X Entries Into Our F80 M3 Sweepstakes
Bav Auto Tools - Corporate Logo
T#:580348
Part#: B8800019
In Stock
Sale - Save 20% $ 29.99

This product was last offered at the strikethrough price on
05-03-2026

$ 23.99 USD
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$ 29.99

This product was last offered at the strikethrough price on
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$ 23.99 USD
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Used to remove your fan clutch

Rein Radiator Hose - Lower - E46
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379779
Part#: 11531436408
In Stock
$ 31.99 USD
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A common source of cooling system failure

Mahle-Behr - Corporate Logo
T#:340539
Part#: 11527505302
Ships in 1 Business Day
$ 238.99

This product was last offered at the strikethrough price on
08-26-2026

$ 229.99 USD
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$ 229.99 USD
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This clutch engages the belt-driven engine fan when the engine is warm/hot, and dis-engages the fan when cold/cool. These commonly fail, causing the engine fan to not spin fast enough (or at all) when your car is stopped in traffic, causing engine to overheat.

This fan clutch fits many 6 cylinder BMWs, including the following::

1992-1998  E36 BMW  323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005  E46 BMW  323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi - Automatic Transmission
1991-1995  E34 BMW  525i 535i M5
1997-2003  E39 BMW  525i 528i 530i
1988-1994  E32 BMW  735i 735il
1997-2002  Z3 BMW  Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
1998-2000  Z3 BMW  M Roadster M Coupe (s52)
2000-2006  E53 BMW  X5 3.0i
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AAF Transmission Crossmembers 5-Speed - E46 Non-M
Fits ZF and Getrag Transmissions. Non-M models Only
Advanced Auto Fabrication - Corporate Logo
T#:7608860
Part#: 116110
In Stock at Vendor
$ 190.00 USD
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$ 190.00 USD
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Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. Ideal for the SE46 racing series, the AAF E46 5-speed Transmission Crossmember is a heavy-duty and worthwhile upgrade. The OEM thin cast aluminum cross member has been known to fail in multiple different ways. When using stiff engine and transmission mounts, the cross member can crack out and break around these mounting points. The cross member can also break from the high amounts of load transferred through the drive train. While chassis flex from hard cornering is being applied through the engine and transmission from the front cross member, this load is sent from the transmission back into the chassis at the transmission cross member. This is simply too much stress for the OEM cross member to hold up to under the extreme punishment of road racing. The AAF E46 Transmission Cross Member is completely constructed of 1/4' thick heavy-duty aluminum plate. It is designed specifically to cope with hours of endurance racing.
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Race German - Corporate Logo
T#:6827887
Part#: RGCTSAM12
In Stock
$ 35.99 USD
Free Shipping on orders $49 and up
Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for M12x1.5 sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor
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Bav Auto Tools - Corporate Logo
T#:580397
Part#: B8800084
In Stock
Sale - Save 15% $ 146.99

This product was last offered at the strikethrough price on
05-03-2026

$ 124.94 USD
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Sale - Save 15%
$ 146.99

This product was last offered at the strikethrough price on
05-03-2026

$ 124.94 USD
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Genuine BMW - Corporate Logo
T#:14119
Part#: 64216902680
In Stock
1% off MSRP $ 73.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 72.99 USD
Free Shipping on orders $49 and up
1% off MSRP
$ 73.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 72.99 USD
Free Shipping on orders $49 and up


Genuine BMW Hose F Radiator And Engine Return
This item fits the following BMW Chassis:
E46 M3,E46


Powerflex - Corporate Logo
T#:34315165
Part#: PFF5-4652H
Ships in 1-2 days
$ 42.99 USD
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T

The BMW E30 / E36 / E46 Offset Lower Radiator Mounts are designed to provide enhanced support and positioning for the radiator in BMW models, specifically the E30, E36, and E46. These mounts are a practical upgrade for vehicles that require extra clearance, especially when using aftermarket or larger radiators in performance builds.

Key Features:

  1. Offset Design for Increased Clearance:

    • The offset configuration of these mounts offers additional room, making them ideal for accommodating larger radiators or custom cooling setups. This ensures proper fitment, especially in high-performance or modified vehicles.
  2. Stable and Secure Mounting:

    • These mounts provide firm support to keep the radiator securely in place, preventing unwanted movement or vibration, which is crucial for maintaining the cooling system’s efficiency during intense driving conditions.
  3. Durability and Heat Resistance:

    • Built from high-quality, heat-resistant materials, these mounts are designed to withstand the rigors of both daily driving and track use. They ensure long-lasting performance even under high temperatures and stress.
  4. Optimized Cooling Performance:

    • By ensuring the radiator is properly aligned and secured, these mounts help maximize the cooling system's performance. Proper positioning allows for efficient airflow through the radiator, which is vital for preventing overheating during demanding driving situations.
  5. Easy Installation:

    • These offset radiator mounts are designed as a direct-fit replacement, making installation simple and straightforward. They are compatible with the BMW E30, E36, and E46, allowing for an easy upgrade to support larger or performance-focused radiators.
  6. Perfect for Modified and Performance Builds:

    • Whether you're upgrading to a high-capacity radiator or modifying your vehicle for improved performance, these mounts offer the extra flexibility and stability needed for customized setups.

Benefits of Upgrading or Replacing:

  • Extra Clearance for Larger Radiators: The offset design allows for better fitment, especially when upgrading to a larger or aftermarket radiator.
  • Prevents Vibration and Damage: These mounts reduce the risk of damage caused by vibration or radiator movement, ensuring longer-lasting performance.
  • Enhanced Cooling Efficiency: Properly securing the radiator ensures that it can work at peak efficiency, leading to better cooling performance during high-demand driving.

In summary, the BMW E30 / E36 / E46 Offset Lower Radiator Mounts are an excellent choice for enthusiasts looking to upgrade their cooling system or accommodate a larger radiator. Their durable construction, ease of installation, and offset design make them a valuable addition for performance builds or maintaining cooling system reliability in modified BMWs.

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Bav Auto Radiator Hose - Lower - E46 M52 M54
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:640203
Part#: 11531436408
In Stock
Sale - Save 16% $ 36.99

This product was last offered at the strikethrough price on
05-03-2026

$ 31.20 USD
Free Shipping on orders $49 and up
Sale - Save 16%
$ 36.99

This product was last offered at the strikethrough price on
05-03-2026

$ 31.20 USD
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OEM Replacement Lower Radiator Hose for E46 3 series (Non-M3). We recommend replacing the Coolant Temperature Sensor while replacing this hose as the original sensor is often damaged while trying to remove it from the old hose. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Bav Auto Expansion Tank Mounting Plate - E46 Non-M w/ Auto Trans ...
For vehicles with an automatic transmission only
10X Entries Into Our F80 M3 Sweepstakes
Bavarian Autosport - Corporate Logo
T#:638089
Part#: 17111436251
In Stock
Sale - Save 20% $ 45.99

This product was last offered at the strikethrough price on
05-03-2026

$ 36.79 USD
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Sale - Save 20%
$ 45.99

This product was last offered at the strikethrough price on
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$ 36.79 USD
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This Bav Auto part is the mounting bracket from the radiator to the expansion tank on E46 3 series and E85/E86 Z4 with an Automatic Transmission. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Schwaben Locking Hose Clamp Pliers
10X Entries Into Our F80 M3 Sweepstakes
Schwaben - Corporate Logo
T#:377131
Part#: 004170SCH01A
Ships on Oct 28, 2026
$ 63.99

This product was last offered at the strikethrough price on
05-02-2026

$ 57.99 USD
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$ 57.99 USD
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These pliers feature a spring loaded clamp with a 24" cable and will lock onto the clamp and hold open for easy removal. These pliers are designed to remove metal or plastic self-tightening hose clamps with diameters from 11/16" to 2-1/2" ( 18 to 54mm).
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Expansion Tank Hose
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:27572101
Part#: 64218376153
In Stock
Sale - Save 20% $ 47.99

This product was last offered at the strikethrough price on
05-03-2026

$ 38.34 USD
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Sale - Save 20%
$ 47.99

This product was last offered at the strikethrough price on
05-03-2026

$ 38.34 USD
Free Shipping on orders $49 and up
Genuine BMW - Corporate Logo
T#:360689
Part#: 11537509227
In Stock
3% off MSRP $ 174.45

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 169.69 USD
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3% off MSRP
$ 174.45

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 169.69 USD
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BMW S54 Swap High-Performance Radiator - E36/E46
2X Entries Into Our F80 M3 Sweepstakes
CSF - Corporate Logo
T#:15180812
Part#: 7211
EO#: D-802-19
In Stock
$ 599.00 USD
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$ 599.00 USD
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The S54 is arguably one of the greatest BMW motors of all time. Power delivery, balance, and sound are top notch. While it doesn’t compare in power potential to newer turbo powered inline 6 motors, many enthusiasts still love and crave the NA power delivery that BMW was and still is famous for. Despite not being the most powerful option, the S54 Swap has become increasingly popular in the BMW community for the E36 Chassis.
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Mishimoto - Corporate Logo
T#:8933504
Part#: MMOCULBK
In Stock
$ 536.99 USD
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$ 536.99 USD
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Ensure your BMW's engine performs at its peak with the installation of this highly efficient oil cooler from Mishimoto. Even in ideal driving conditions, elevated oil temperatures can lead to decreased pressure and compromised engine lubrication. This comprehensive kit includes four feet of stainless braided line, adapter fittings, and an oil filter sandwich adapter, all meticulously designed to reduce oil temperatures and uphold optimal driving circumstances.

  • Rows: 19
  • Overall Dimensions: 13" x 5.5" x 2"
  • Core Dimensions: 11.25" x 5.5" x 2"
  • Braided Hoses: 4ft .75 inch & 4ft 9 inch
  • Braided Hose Fittings: -10AN
  • Sandwich Plate Fittings: -10AN

Please take into consideration that this product may be subject to Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968). Proposition 65 is a California law that applies to companies selling products in California and necessitates the disclosure of chemicals known to cause cancer, birth defects, or other reproductive harm when present at levels exceeding specified thresholds. For further information regarding California Prop 65 warnings, visit www.P65Warnings.ca.gov.

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OEM Rein Lower Radiator Hose - E46 M3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:2674
Part#: 11537830715
In Stock
$ 23.99 USD
Free Shipping on orders $49 and up

Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure. This hose replaces the lower radiator hose that connects the radiator to the thermostat housing.

This Lower Radiator Hose fits the following BMWs:
2001-2006 E46 3 Series M3, M3 Convertible

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Mishimoto - Corporate Logo
T#:29002063
Part#: MMOC10
In Stock
$ 126.99 USD
Free Shipping on orders $49 and up

BMW & MINI Universal Oil Cooler - 10 Row is a versatile cooling solution designed to enhance the performance and reliability of BMW and MINI vehicles. This high-quality oil cooler provides efficient cooling for the engine oil, ensuring optimal operating temperatures and extending the life of vital engine components.

Crafted with precision engineering and durable materials, the BMW & MINI Universal Oil Cooler - 10 Row is compatible with a wide range of BMW and MINI models, offering versatility and ease of installation. It effectively dissipates heat from the engine oil, reducing the risk of overheating and engine damage.

  • Enhances performance and reliability of BMW and MINI vehicles
  • Efficient cooling for engine oil, ensuring optimal operating temperatures
  • Extends the life of vital engine components
  • Compatible with a wide range of BMW and MINI models
  • Versatile and easy to install
  • Crafted with precision engineering and durable materials

Investing in the BMW & MINI Universal Oil Cooler - 10 Row is a smart choice for BMW and MINI owners looking to improve their vehicle's performance and longevity.

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Thermostat With Housing
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:26494584
Part#: 11537509227
In Stock
Sale - Save 25% $ 60.99

This product was last offered at the strikethrough price on
05-03-2026

$ 45.99 USD
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Sale - Save 25%
$ 60.99

This product was last offered at the strikethrough price on
05-03-2026

$ 45.99 USD
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Race German - Corporate Logo
T#:6827888
Part#: RGCTSA1/8NPT
In Stock
$ 35.99 USD
Free Shipping on orders $49 and up
Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for 1/8NPT sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor
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Redline - Corporate Logo
T#:640437
Part#: 81205
In Stock
$ 68.99 USD
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$ 68.99 USD
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Red Line SuperCool Concentrate fortified with WaterWetter is a concentrated antifreeze/coolant designed to maximize the performance of your cooling system with superior protection against cavitation corrosion/erosion. Using SuperCool Concentrate diluted with distilled water protects the entire cooling system keeping new components like new for 5 years/150,000 miles and prevents further damage to older components. Red Line’s proprietary coolant additive formula enhances the fluid’s ability to transfer heat, reducing operating temperatures by up to 20*F and prolonging the life of the entire cooling system. Red Line's SuperCool is an OAT coolant that is a Nitrate and Silicate Free product with its own proprietary corrosion technology to offer superior protection for aluminum engines found in all European vehicles, performance vehicles, as well as other applications. SuperCool will not void the factory warranty either. It can be used to top off the existing coolant of any BMW and will not cause any ill-effects on the cooling system because it is silicate and nitrate free. It is still better to flush it out and switch completely to SuperCool to get all the full benefits of the product in performance and protection.
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Advanced Auto Fabrication - Corporate Logo
T#:7624630
Part#: 116211
In Stock at Vendor
$ 175.00 USD
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$ 175.00 USD
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Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. The factory M54 thermostat is electronically controlled to keep the engine running between 80-103°C, whereas race cars like to maintain 80°C or less for maximum power. Additionally, the mechanical failsafe doesn’t open up until the coolant temperature reaches 110°C, or 230°F, which is about the point when most race cars are turned off and parked which is no good for the motor! The AAF E46 M54 Low Temp Thermostat Kit is designed to give the control of proper engine operating temperature back by replacing the stock electronic thermostat with a manual unit. This allows the engine to run at the proper, and much safer, operating temperature, improving engine longevity, reduces stress from high-temp. operation, reduces heat soak, and increases power! Full Kit Contents: Thermostat housing Thermostat housing plate Thermostat install hardware sealant
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Genuine BMW - Corporate Logo
T#:1030
Part#: 11517509985
In Stock
11% off MSRP $ 192.54

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 172.26 USD
Free Shipping
11% off MSRP
$ 192.54

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 172.26 USD
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This Original BMW water pump is the latest updated design with a composite impeller. The composite material (similar to Kevlar) is much stronger than the problematic plastic impeller from past water pumps. And it's lighter than the aftermarket metal impellers so that means less strain on the bearing. For an OE/OEM replacement, we have found that this is the highest quality and longest lasting waterpump available.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This waterpump fits the following BMWs:
1999-2006 E46 3 series - 323i, 323Ci, 328i, 328Ci, 325i, 325Ci, 330i, 330Ci
1999-2003 E39 5 series - 528i, 525i, 530i
1999-2002 Z3 Roadster/Coupe - Z3 2.8, Z3 2.5, Z3 3.0
2004-2006+ X3 SAV - X3 2.5 & 3.0
2000-2006 X5 SAV - X5 3.0
2003-2005 Z4 Roadster/Coupe - Z4 2.5 & Z4 3.0
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Bav Auto Fan Pulley Holder
10X Entries Into Our F80 M3 Sweepstakes
Bav Auto Tools - Corporate Logo
T#:580358
Part#: B8800031
Ships on Mar 5, 2027
Sale - Save 15% $ 23.99

This product was last offered at the strikethrough price on
05-03-2026

$ 20.39 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 23.99

This product was last offered at the strikethrough price on
05-03-2026

$ 20.39 USD
Free Shipping on orders $49 and up
Used to remove your fan clutch
Mishimoto - Corporate Logo
T#:637390
Part#: MMFAN-16C
In Stock
$ 117.99 USD
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$ 117.99 USD
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This curved blade fan can be used as an upgrade to the OEM fan for more efficient cooling or fitment issues with aftermarket products. With its slim design, the fan can easily be installed flush against a radiator. For universal installation, use Mishimoto universal fan mount kit, T#363171. Features: High-flow curved blade fan provides 1850 cfm of airflow Universal fitment Compact design with a diameter of 16" and an overall thickness of only 3.2" provides increased engine bay space Mishimoto Lifetime Warranty WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
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Radiator Hose - Lower
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:38655188
Part#: 11537830715
In Stock
Sale - Save 17% $ 26.99

This product was last offered at the strikethrough price on
05-03-2026

$ 22.53 USD
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Sale - Save 17%
$ 26.99

This product was last offered at the strikethrough price on
05-03-2026

$ 22.53 USD
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Genuine BMW - Corporate Logo
T#:12482
Part#: 17112229053
In Stock
1% off MSRP $ 96.35

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 95.28 USD
Free Shipping
1% off MSRP
$ 96.35

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 95.28 USD
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This is the Genuine BMW coolant reservoir / expansion tank vent hose for E46 M3 with the S54 engine.

This item fits the following BMWs:
2001-2006 E46 BMW M3
Genuine BMW - Corporate Logo
T#:12502
Part#: 11531318274
In Stock
16% off MSRP $ 147.44

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 123.15 USD
Free Shipping
16% off MSRP
$ 147.44

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 123.15 USD
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GENUINE BMW THERMOSTAT - E46 M3, MZ3 (S54), MZ4. This is just the thermostat itself and does not include the housing o-ring or any others that are advised for replacement. See thermostat kit or our water pump kit for a complete package.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.
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OEM Rein Expansion Tank Hose - E46 3-Series
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:363453
Part#: 64218376153
In Stock
$ 82.99

This product was last offered at the strikethrough price on
05-06-2026

$ 34.99 USD
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$ 34.99 USD
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Expansion tank to heater core
E46 M3 Radiator Hose - Upper And Lower
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:20617632
Part#: 11537830715KT
In Stock
$ 53.98 USD
Free Shipping on orders $49 and up

Both thermostat housing hoses to replace your worn out rubber and brittle plastic connections.

Over the years and with exposure to extremely hot coolant, the coolant hoses in your vehicle can take a beating. Being made of reinforced rubber, these hoses can fail in a number of ways. Splitting at a hose clamp, swelling, cracking, and breaking are just a few of the ways this hose can leave you stranded. Replace it at the first sign of wear to keep your coolant in your engine.

Comes with both upper and lower thermostat hoses: 11537830715 Lower + 11537830716 Upper

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Radiator Pressure Tester Kit
10X Entries Into Our F80 M3 Sweepstakes
Schwaben - Corporate Logo
T#:391482
Part#: 014710SCH01A
In Stock
Sale - Save 25% $ 205.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 154.49 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 205.99

This product was last offered at the strikethrough price on
05-03-2026

$ 154.49 USD
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Are you refreshing your coolant system or having issues with coolant loss? An easy way to test your system for leaks and ensure you're able to maintain pressure without coolant loss is the Schwaben Cooling System Pressure Tester Kit.
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Schwaben Long-Reach 32mm Open End Fan Clutch Wrench
10X Entries Into Our F80 M3 Sweepstakes
Schwaben - Corporate Logo
T#:378938
Part#: 007701SCH01A
In Stock
Sale - Save 25% $ 42.99

This product was last offered at the strikethrough price on
05-02-2026

$ 32.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 42.99

This product was last offered at the strikethrough price on
05-02-2026

$ 32.24 USD
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This tool was specifically designed for the tight clearances needed to remove most BMW fan clutches. Its slim design lets it fit into tight areas, and the extra-long length is ideal for fan shroud clearance. 
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BMW E46 Cooling Fan Shroud
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:377316
Part#: 17111436259
Back Ordered
$ 52.89

This product was last offered at the strikethrough price on
08-08-2026

$ 47.99 USD
$ 47.99 USD

BMW E46 Cooling Fan Shroud is essential for maximizing airflow through your radiator, ensuring optimal engine cooling. This shroud is designed to create the most efficient pull of air, keeping your engine temperature under control, especially during demanding driving conditions.

  • Enhanced Cooling Efficiency: Maximizes airflow through the radiator, ensuring your engine stays cool.
  • High-Quality Construction: Manufactured by URO Parts, a leading brand known for producing reliable and durable replacement components.
  • Precision Fit: Designed specifically for the BMW E46, ensuring a perfect fit and easy installation.
  • ISO 9000 Certified: Built to meet ISO 9000 certification standards for long-lasting performance and reliability.
  • Trusted by Enthusiasts: URO Parts is a trusted name in the automotive industry, offering components that deliver OEM-like performance.

Upgrade your BMW E46 with this Cooling Fan Shroud from Turner Motorsport to enhance your vehicle’s cooling system and maintain peak performance.

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Meyle Coolant Expansion Tank - E53 X5, E46 M52/54, E83 X3
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:369184
Part#: 17117573781
In Stock
$ 66.99 USD
Free Shipping on orders $49 and up

We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on.

Other items to consider replacing at the same time are the radiator cap, coolant level sensor, lower radiator hose, coolant temp sensor, and the hose clamps. If your car has an automatic transmission you should also replace the oil cooler thermostat in the radiator frame, which is a common source for leaks.

As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Mishimoto - Corporate Logo
T#:31291020
Part#: MMOC10BK
Ships in 3 Business Days
$ 126.99 USD
Free Shipping on orders $49 and up

Universal Oil Cooler Black - 10 Row is engineered to maintain optimal oil temperatures and ensure peak engine performance under various driving conditions. This high-performance oil cooler effectively reduces oil temperatures, preventing a drop in pressure and maintaining proper engine lubrication. Featuring a robust 10-row design, it offers superior cooling efficiency compared to standard coolers.

  • Efficient Cooling: The 10-row design enhances cooling capacity to manage high oil temperatures effectively.
  • Durable Construction: Black finish provides durability and resistance to environmental factors.
  • Optimized Performance: Helps prevent a drop in oil pressure and maintains proper engine lubrication.
  • Versatile Fitment: Universal design suitable for various vehicles and applications.
  • Compact Size: Overall dimensions of 12.95" x 3.8" x 1.97" and core dimensions of 11" x 2.76" x 1.97" ensure a good fit in most engine bays.

WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to all companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.

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Spal - Corporate Logo
T#:376582
Part#: 30102049
Ships in 7 Business Days
$ 207.99 USD
Free Shipping
$ 207.99 USD
Free Shipping

For BMW owners seeking enhanced airflow or tighter engine compartment clearance, Turner Motorsport presents a Universal Fan. Ideal for applications like aftermarket turbo setups, this fan ensures optimal cooling performance. Please note that this fan is universal and may require modification to fit your specific application. Crafted in Italy, this fan boasts dimensions of 16.30in x 15.75in x 3.47in and provides an airflow of 2024 CFM.

  • Enhanced airflow for improved engine cooling
  • Ideal for applications with tight tolerances, such as aftermarket turbo setups
  • Universal design allows for versatile installation
  • Crafted in Italy for quality assurance
  • Compact size with powerful airflow capacity
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BMW E46 M3 S54 3.2L Water Pump
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:378573
Part#: 11517838159
Ships in 1 Business Day
$ 105.79 USD
Free Shipping
$ 105.79 USD
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Includes sealing gaskets

Mahle-Behr - Corporate Logo
T#:341098
Part#: 11537509227
Ships in 1 Business Day
$ 104.39

This product was last offered at the strikethrough price on
08-14-2026

$ 104.28 USD
Free Shipping
$ 104.28 USD
Free Shipping

Replacement stock MAP thermostat with plastic housing and gasket for E46, E39, E60, X5, Z4 - M54 engine, M52TU engine. Your car may still operate fine according the instrument display but the electrically-operated thermostat may be going bad. This new thermostat includes the thermostat gasket, ready to install in your BMW.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

Applications:
1999-2003 E39 528i, 525i, 530i sedan, touring wagon (M52TU engine, M54 engine)
1999-2005 E46 323, 328, 325, 330 sedan, coupe, cabrio, touring wagon (M52TU engine, M54 engine)
2004-2005 E60 525i, 530i sedan, touring wagon (M54 engine)
2001-2006 E53 X5 3.0 (M54 engine)
2004-2006 E83 X3 2.5i X3 3.0i (M54 engine)
1999-2002 Z3 2.3. Z3 2.5i, 2.8 Z3 3.0i (M54 engine)
2003-2005 Z4 2.5i, Z4 3.0 (M54 engine)

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Advanced Auto Fabrication - Corporate Logo
T#:7608839
Part#: 11641
In Stock at Vendor
$ 189.00 USD
Free Shipping on orders $49 and up

BMW E46 AAF Aluminum Radiator Mounting Kit provides a robust solution for mounting an aluminum radiator into the BMW E46 chassis without relying on the stock plastic mounts. Developed by Advanced Auto Fabrication, a company renowned for their expertise in producing high-performance race car components, this kit reflects their extensive knowledge and dedication to BMW race car design.

The mounting kit is designed to replace the stock mounting system and is compatible with lightweight aftermarket fans, as the stock electric fan cannot be used. Please note that this kit does not fit M3 models.

  • Durable Construction: Made from high-quality aluminum for strength and longevity.
  • Enhanced Cooling Efficiency: Allows for the use of aftermarket fans for improved cooling performance.
  • Race-Ready Design: Reflects Advanced Auto Fabrication's expertise in BMW race car components.
  • No Stock Plastic Mounts: Provides a more reliable and robust mounting solution than the factory system.
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Mishimoto - Corporate Logo
T#:640347
Part#: MMTS-E46-99V2
Ships in 3 Business Days
$ 135.99 USD
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$ 135.99 USD
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Spal - Corporate Logo
T#:598821
Part#: 30101516
Ships in 2 Business Days
11% off MSRP $ 168.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 149.99 USD
Free Shipping
11% off MSRP
$ 168.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 149.99 USD
Free Shipping
1469 CFM. High performance puller fan with straight blades. This is a universal fan for applications that require more air flow or for engine compartments that have tight tolerances such as an aftermarket turbo set up that needs more clearance. This fan is universal and you must make it fit your application. It is not a direct bolt on. Made in Italy. Size: 16.3in x 15.75in x 2.48in Airflow (CFM): 1469
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Condor Speed Shop - Corporate Logo
T#:577556
Part#: SPALM
Ships in 3 Business Days
$ 66.99 USD
Free Shipping
$ 66.99 USD
Free Shipping
Stainless steel brackets for mounting a 16" SPAL fan on an OEM or aftermarket BMW radiator. The fan can be mounted on either side of the radiator. All mounting hardware is included. Fitment: e30, E36, E46
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Radiator Hose - Upper
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:38621426
Part#: 11537830716
In Stock
Sale - Save 22% $ 25.99

This product was last offered at the strikethrough price on
05-03-2026

$ 20.39 USD
Free Shipping on orders $49 and up
Sale - Save 22%
$ 25.99

This product was last offered at the strikethrough price on
05-03-2026

$ 20.39 USD
Free Shipping on orders $49 and up

Schwaben Locking Hose Pinch-Off Pliers
10X Entries Into Our F80 M3 Sweepstakes
Schwaben - Corporate Logo
T#:379950
Part#: 009787SCH01A
In Stock
Sale - Save 15% $ 39.99

This product was last offered at the strikethrough price on
05-02-2026

$ 33.99 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 39.99

This product was last offered at the strikethrough price on
05-02-2026

$ 33.99 USD
Free Shipping on orders $49 and up

Schwaben Locking Hose Pinch-Off Pliers have adequate clamping force to effectively seal large or pressurized cooling system hoses. These pliers are ideal for clamping shut most hoses, ensuring reliability in your automotive tasks. With swivel jaws, they provide even clamping force, making them a versatile tool for various applications.

  • Adequate clamping force for large or pressurized hoses
  • Ideal for clamping shut most hoses
  • Swivel jaws ensure even clamping force
  • Versatile tool for automotive maintenance

WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. For more information, visit http://www.p65warnings.ca.gov.

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Mishimoto - Corporate Logo
T#:51075091
Part#: MMWP-M50-92
In Stock
$ 72.99 USD
Free Shipping on orders $49 and up
The Mishimoto Performance Water Pump provides the thermal stability required for modified engines.
70-78mm - T-Bolt Hose Clamp - Priced each
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:380416
Part#: 003402ECS07A-03
In Stock
Sale - Save 25% $ 31.99

This product was last offered at the strikethrough price on
06-13-2026

$ 23.99 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 31.99

This product was last offered at the strikethrough price on
06-13-2026

$ 23.99 USD
Free Shipping on orders $49 and up

Ensure a tight and leak-free seal in your BMW's cooling, vacuum, or intake systems by installing a new adjustable hose clamp. Over time, clamps can deform or lose their tightness due to aging or frequent removal, potentially causing leaks in your coolant or vacuum hoses. Avoid the risk of leaks by replacing old clamps with new hardware, offering peace of mind against coolant and vacuum system issues.

Key benefits of the adjustable hose clamp include:

  • Maintaining a secure and leak-free seal in your BMW's systems.
  • Preventing coolant or vacuum leaks that can affect performance.
  • Adjustable size from 70mm to 78mm for versatile applications.

Upgrade your hose clamps to ensure optimal performance and reliability in your BMW's systems.

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BMW S54 Swap Race-Spec Oil Cooler - E36/E46
2X Entries Into Our F80 M3 Sweepstakes
CSF - Corporate Logo
T#:15180814
Part#: 8240
In Stock
$ 519.00 USD
Free Shipping
$ 519.00 USD
Free Shipping
The ONLY choice for your S54 swapped E36 or E46. The new CSF S54 Swap Race Spec Oil Cooler is shorter on the right hand side allowing owners to run the A/C lines in the OEM path. Even though the #8240 is slightly smaller than the #8032, you can expect similar performance levels as they both feature a dual pass design with 8 cooling rows and are the same turbulated heavy-duty bar/plate construction.
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Genuine BMW - Corporate Logo
T#:360755
Part#: 17127510952
In Stock
7% off MSRP $ 104.65

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 97.39 USD
Free Shipping
7% off MSRP
$ 104.65

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 97.39 USD
Free Shipping

OEM Replacement Upper Radiator Hose for E46 3 series (Not M3).

This lower radiator hose fits the following BMWs: 
1999-2000 E46 3 Series Sedan/Wagon - 323i & 328i 
1999-2000 E46 3 Series Coupe/Conbertible - 323Ci & 328Ci 
2001-2005 E46 3 Series Sedan/Wagon - 325i, 325xi, 330i, 330xi 
2001-2006 E46 3 Series Coupe/Convertible - 325Ci, 330Ci 

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