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BMW Cooling System Parts & Accessories

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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BMW E46 M54 AAF Low Temp Thermostat Kit - Partial

T#:7624632

Part#: 116211.2

Ships in 1 Business Day

$ 85.00 USD

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$ 85.00 USD

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BMW E46 M54 AAF Low Temp Thermostat Kit - Partial is an essential upgrade for enthusiasts looking to optimize engine performance and reliability. Developed by Advanced Auto Fabrication (AAF), this kit addresses the limitations of the factory M54 thermostat, which maintains a temperature range of 80-103°C and opens the mechanical failsafe at 110°C. For race conditions where maintaining a lower temperature is crucial, this kit replaces the stock electronic thermostat with a manual unit, allowing the engine to run at a safer and more efficient temperature. This upgrade not only enhances engine longevity but also reduces stress from high-temperature operation, minimizes heat soak, and increases power.

Optimal Temperature Control: Replaces the factory thermostat for improved engine temperature management.
Enhanced Engine Longevity: Operates at safer temperatures, reducing stress and extending engine life.
Increased Power: Lower operating temperatures can lead to better engine performance.
Reduced Heat Soak: Helps prevent overheating and ensures efficient cooling.
Improved Reliability: Manual thermostat unit offers more consistent performance in racing conditions.

Partial Kit Contents:

Thermostat housing plate
Thermostat
Installation hardware

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OEM INA Water Pump - BMW N54 N55 3.0L

T#:40004835

Part#: 11515A05704

In Stock

$ 445.99 USD

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$ 445.99 USD

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Water pumps are a critical component of your cooling system. A failed water pump will stop the flow of coolant in your vehicle, leading to overheating and eventual engine damage. Replace your faulty or aging water pump with a high-quality OEM unit from Schaeffler. Replacement for BMW part # 11519455978, 11517632426, and 11517563659.

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AAF Transmission Crossmembers 5-Speed - E46 Non-M

Fits ZF and Getrag Transmissions. Non-M models Only

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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AAF Low Temp Thermostat Kit - Full Kit - E46

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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BMW E46 AAF Aluminum Radiator Mounting Kit

T#:7608839

Part#: 11641

In Stock at Vendor

$ 189.00 USD

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$ 189.00 USD

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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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RADIATOR 3.2L- 2 CORE- ALSO FIT M COUPE M ROADSTER- E36

T#:20946747

Part#: RAD3Z398

Ships in 7 Business Days

$ 152.99 USD

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$ 152.99 USD

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1 piece of 2-row radiator Made of lightweight & long-lasting aluminum material Overall dimension: 24.5" (L) x 2.75" (W) x 18.5" (H) Inlet: 1.5"/ Outlet: 1.5" Provides maximum cooling efficiency

Behr Radiator - E36

T#:1196128

Part#: 17111723784

Ships in 1 day

$ 298.99

This product was last offered at the strikethrough price on
07-15-2026

$ 267.99 USD

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$ 267.99 USD

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Brand new radiator equivalent to OE

AAF E46 Transmission Crossmembers - 6-Speed Non-M

For use with solid front engine mounts only!

T#:7624639

Part#: 116222

In Stock

$ 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 6-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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Radiator

T#:591360

Part#: 17111728905

In Stock

$ 399.99

This product was last offered at the strikethrough price on
05-07-2026

$ 314.72 USD

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$ 314.72 USD

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Behr Replacement Radiator - More than likely, you are going to replace the radiator in your vehicle at least once. The joints where the cores meet the end tanks tend to get weak and are the first place to spring a leak. Impacts to the fins themselves can cause holes to form. Corrosion and clogging from the inside can make cooling less than effective and compromise coolant flow.

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Automatic Transmission Cooler - E36 Z3 E34

T#:2069

Part#: 17201728770

Ships in 1 Business Day

$ 207.15

This product was last offered at the strikethrough price on
05-11-2026

$ 201.87 USD

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$ 201.87 USD

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This transmission fluid/oil cooler fits E36 318i 318is 318ti 323i 323is 325i 325is 328i 328is M3, E34 525i 530i 1993-1995 and Z3 1.9 2.3 2.5i 2.8 3.0i with automatic transmission.

This oil cooler fits the following BMWs:
1992-1998 E36 BMW 318i 318is 318ti 323is 325i 325is 328i 328is M3
1993-1995 E34 BMW 525i 525i Wagon
1994-1995 E34 BMW 530i 530i Wagon
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0ibr>

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AAF E46 Radiator Fan Shroud

T#:7624641

Part#: 116251

In Stock at Vendor

$ 140.00 USD

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$ 140.00 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. AAF has created a light-weight fan shroud for your E46 race car. Equipped with 7 flaps to let as much air through as possible at speed and fits a 14' fan. Seamlessly attaches to the AAF Radiator Mounts. The shroud creates a vacuum to expand the fan’s ability to pull from the entire surface area of the radiator. This creates cooler temps under the hood with the benefit of 7 flaps that allow the most air to pass through. **AAF states fitment has only been thoroughly tested with their radiator mounts. No fitment info for the stock plastic mounts is available at this time. AAF has created a light-weight fan shroud for your E46 race car. Equipped with 7 flaps to let as much air through as possible at speed and fits a 14' fan. Seamlessly attaches to the AAF Radiator Mounts. The shroud creates a vacuum to expand the fan’s ability to pull from the entire surface area of the radiator. This creates cooler temps under the hood with the benefit of 7 flaps that allow the most air to pass through. **AAF states fitment has only been thoroughly tested with their radiator mounts. No fitment info for the stock plastic mounts is available at this time. *Does not include fan.

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AAF E46 Transmission Crossmembers - 6-Speed M

For M Models

T#:7624640

Part#: 116223

Ships in 3 Business Days

$ 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 6-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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OEM INA Electronic Thermostat And Coolant Distribution Module - BMW B...

We Price Match - Give Us A Call or Chat!

T#:36201645

Part#: 11538642559

In Stock

$ 367.99

This product was last offered at the strikethrough price on
07-23-2026

$ 356.99 USD

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$ 356.99 USD

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Engineered specifically for BMW models, the electronic thermostat and coolant distribution module plays a vital role in the engine’s cooling system, adapting to changing temperatures for superior performance under all driving conditions. Whether on the track or the highway, this module ensures your BMW runs cooler, longer, and more efficiently.

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Hella Radiator - Manual - E34

T#:363371

Part#: 17111737760

Ships in 2 Business Days

$ 687.60

This product was last offered at the strikethrough price on
08-13-2026

$ 497.64 USD

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$ 497.64 USD

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Replace your leaking radiator

Aluminum 2-Row Performance Radiator - 1998-2002 BMW E36 Z3 M Coupe/Ro...

T#:14684348

Part#: RAD3-Z398

Ships in 7 Business Days

$ 152.99 USD

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$ 152.99 USD

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Brand new in original box 1 piece of 2-row radiator Made of lightweight & long-lasting aluminum material Overall dimension: 24.5" (L) x 2.75" (W) x 18.5" (H) Inlet: 1.5"/ Outlet: 1.5" Provides maximum cooling efficiency Professional installation is recommended

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ACM Auxiliary Fan Assembly - Suction - E36, Z3

T#:371894

Part#: 64508372039

Back Ordered

$ 166.99 USD

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$ 166.99 USD

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Mounted behind the radiator

Behr Radiator - E60, E61, E63, E64

T#:579569

Part#: 376755591

Back Ordered

$ 267.99 USD

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$ 267.99 USD

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Replace your leaking radiator

OEM INA Heat Management Module - MINI F5X F60 B36 B46

We Price Match - Give Us A Call or Chat!

T#:34214774

Part#: 11538631943

In Stock

$ 264.99 USD

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$ 264.99 USD

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Maximize performance and safeguard your engine with the Heat Management Module, engineered to deliver superior temperature control and reliability under extreme conditions.

REMOTE RADIATOR

T#:33047035

Part#: 17117634565

Ships in 1 day

$ 156.99

This product was last offered at the strikethrough price on
05-07-2026

$ 122.99 USD

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$ 122.99 USD

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OEM INA Water Pump - BMW N52 3.0L

We Price Match - Give Us A Call or Chat!

T#:36201646

Part#: 11517586925

Ships in 7 Business Days

$ 624.99 USD

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$ 624.99 USD

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Choose the INA Water Pump for E90 E92 and E93 to ensure your BMW’s cooling system operates efficiently, providing peace of mind and reliable performance on every drive.

E46 323/325/328/330 Manual, Z4 OEM Behr Radiator

T#:338021

Part#: 17119071518

In Stock at Vendor

Starting at $ 249.99 USD

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Starting at $ 249.99 USD

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This is a BEHR brand (OEM supplier to BMW) replacement radiator for all 1999-2006 E46 3 series (non-M), including 323i, 323Ci, 328i, 328Ci, 325i, 325Ci, 330i, 330Ci, and Z4 2.5 and 3.0. Compare to BMW list price of $318! Save big, while still getting the highest quality radiator available for your BMW.

This radiator fits the follow BMWs: :
Only for Manual Transmission
1999-5/2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi - Not for cars with M56 engine

2003-2006 E85 BMW Z4 2.5i Z4 3.0i - M54 engine
2006-2008 E85 BMW Z4 M Roadster M Coupe

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Mounting Part

T#:5095677

Part#: 64113422668

Ships in 2 Business Days

$ 25.99 USD

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$ 25.99 USD

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Behr Radiator Replacement

For Automatic Vehicles only

T#:591355

Part#: 17117519211

Ships in 1 Business Day

$ 454.11

This product was last offered at the strikethrough price on
08-17-2026

$ 388.67 USD

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$ 388.67 USD

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Replace your faulty or worn radiator with this factory replacement

ACM Air Conditioning Fan - E39

T#:374495

Part#: 64548380780

Ships in 1 day

$ 229.99

This product was last offered at the strikethrough price on
05-07-2026

$ 223.99 USD

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$ 223.99 USD

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Also known as "pusher fan"

Radiator

T#:594798

Part#: 17117576827

Ships in 1 day

$ 415.99 USD

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Qty

$ 415.99 USD

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Replacement Radiator from Behr Hella

Radiator

T#:594800

Part#: 17117605644

Ships on Sep 21, 2026

$ 362.99 USD

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Qty

$ 362.99 USD

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Replacement Radiator from Behr

Radiator

T#:594801

Part#: 17117570094

Ships on Sep 21, 2026

$ 374.99 USD

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$ 374.99 USD

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More than likely, you are going to replace the radiator in your vehicle at least once. The joints at where the cores meet the ends tend to get weak and are the first place to spring a leak. Impacts to the fins themselves can cause holes to form. Corrosion and clogging from the inside can make it less than effective. Replace your leaking unit with a factory replacement and get that jug of coolant out of your back seat.

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INA Water Pump for E60 , E71 and F10

We Price Match - Give Us A Call or Chat!

T#:36574507

Part#: 11517632426

Back Ordered

$ 691.99 USD

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$ 691.99 USD

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This premium replacement water pump is engineered to OE specifications for performance, reliability, and longevity, making it an essential component for maintaining optimal engine temperatures

Behr Radiator - E34

T#:1195792

Part#: 17111723467

Back Ordered

$ 273.99

This product was last offered at the strikethrough price on
05-07-2026

$ 265.99 USD

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$ 265.99 USD

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OE replacement radiator

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