Genuine BMW 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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Genuine BMW - Level 2 Cooling System Refresh Kit + Belts - E46 M52, M...
For vehicles with production date up to 09/2002
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Genuine BMW - Corporate Logo
T#:369665
Part#: ECSE461711-2
Ships in 5 Business Days
$ 1,100.99 USD
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$ 1,100.99 USD
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A Level 2 kit that includes belt service components
Expansion Tank Mounting Bracket - E46 - Manual Trans
For vehicles with manual transmission only
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Genuine BMW - Corporate Logo
T#:13180
Part#: 17111436250
Ships in 2 Business Days
2% off MSRP $ 134.99

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

$ 131.99 USD
Free Shipping
2% off MSRP
$ 134.99

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

$ 131.99 USD
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This Genuine BMW part is the mounting bracket from the radiator to the expansion tank on E46 3 series Manual Transmission.

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 item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
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Genuine BMW Radiator - E46 M3
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T#:13727086
Part#: 17115A7DEF2
Ships in 2 Business Days
6% off MSRP $ 756.99

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

$ 713.99 USD
6% off MSRP
$ 756.99

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

$ 713.99 USD
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. Replace your leaking unit with a factory replacement and get that jug of coolant out of your back seat. This is a factory original style radiator from Genuine BMW and will fit perfectly into the stock location. Cooling will be identical to what your car came with originally. A great replacement with all the proper connections and in all of the proper locations. When doing radiator and cooling service, you will obviously lose coolant. Browse through the cooling section of your model to see factory correct coolants, seals, and caps. Before beginning, check your hoses to make sure everything is in good shape.
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Genuine BMW Radiator Return Line - 32412282353 - E46,E46 M3
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T#:12524
Part#: 32412282353
Ships in 2 Business Days
2% off MSRP $ 280.99

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

$ 274.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 280.99

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

$ 274.99 USD
Free Shipping on orders $49 and up


Genuine BMW Radiator Return Line
This item fits the following BMW Chassis:
E46 M3,E46


Genuine BMW Auxiliary Fan Assembly - E46 M3
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Genuine BMW - Corporate Logo
T#:20181
Part#: 64546988914
Ships in 5 Business Days
2% off MSRP $ 938.99

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

$ 915.99 USD
2% off MSRP
$ 938.99

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

$ 915.99 USD
This electric auxiliary fan for BMW E46 mounts in front of the radiator and is designed to push air through the A/C Condenser and main radiator. It provides additional cooling for when the car is in traffic. It is a common failure item. If your engine temps are creeping up or if your A/C isn't blowing cold this could be the cause.

Genuine BMW Pusher Fan
This item fits the following BMW Chassis:
E46 M3,E46

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Genuine BMW Coolant hose - E46 M3
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Genuine BMW - Corporate Logo
T#:150725
Part#: 64216902678
Ships in 2 Business Days
2% off MSRP $ 55.99

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

$ 54.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 55.99

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

$ 54.99 USD
Free Shipping on orders $49 and up


Genuine BMW Hose F Engine Inlet And Water Valve
This item fits the following BMW Chassis:
E46 M3,E46


Hex Bolt & Washer Kit
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Genuine BMW - Corporate Logo
T#:55245856
Part#: 0711990XXKTKT
Ships in 5 Business Days
New Item
$ 35.31 USD
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Turner Motorsport offers this Genuine BMW Hex Bolt and Washer Kit to keep your chassis maintenance or engine refresh completely up to factory standard.
Fan Delete Nut
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Genuine BMW - Corporate Logo
T#:3459
Part#: 11511310640
In Stock
$ 17.99 USD
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This BMW Motorsport part was designed for BMW touring car racing. This reverse thread nut covers the ugly exposed stud when you remove your engine fan and fan clutch. This simple part cleans up the look of an engine with the fan removed. Fits most BMW models. COOL!
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Genuine BMW Coolant Bleeder Screw 17111712788
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T#:7432
Part#: 17111712788
In Stock
$ 5.94 USD
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This is the Genuine BMW Coolant bleeder screw. We recommend a heavy duty Aluminum replacement from ECS Tuning if you do not want to replace this part again when it fails.


Genuine BMW Vent Screw
This item fits the following BMW Chassis:
E36 M3,E46 M3,E85 Z4M,E53 48IS,E30,E34,E36,E38,E39,E46,E53 X5 X5,E83 X3,E85 Z4,E86 Z4,E90
 

 

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BMW Expanding Rivet
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Genuine BMW - Corporate Logo
T#:7436
Part#: 17111712963
In Stock
$ 1.99 USD
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The most common use for this rivet is to secure the radiator fan shroud to the radiator. This rivet can also be used on a wide variety of other applications as well.

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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Genuine BMW O-Ring - Priced Each
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Genuine BMW - Corporate Logo
T#:367933
Part#: 17222245358
In Stock
$ 3.99 USD
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Upgrade your BMW's oil or transmission cooling system with the Turner Motorsport Genuine O-Ring, part number 17222245358. This high-quality O-ring is designed to provide a reliable seal, ensuring optimal performance and preventing leaks in your BMW's vital systems. Additionally, it is compatible with MINI applications, where it is commonly used on the end of the parking brake cable.

  • Genuine BMW part for guaranteed quality and compatibility
  • Prevents leaks in the oil and transmission cooling systems
  • Ensures optimal performance of vital components
  • Compatible with MINI applications for versatile use
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Genuine BMW Engine O-ring S54 3.2L 11537830709
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Genuine BMW - Corporate Logo
T#:13012
Part#: 11537830709
In Stock
$ 6.99 USD
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Ensure your BMW remains leak-free by replacing all associated O-Rings when replacing the water pump. If experiencing leaks, inspect these rings for wear and tear. This O-Ring is specifically used on the return pipe to the thermostat housing.

  • Prevents leaks for enhanced car performance
  • Essential for maintaining a leak-free system
  • Inspects and replaces worn O-Rings for optimal functionality
  • Compatible with BMW models for hassle-free installation
GENUINE BMW O-RING:11709521.--

This item fits the following BMWs:
BMW M Series - M3, M3 Convertible
BMW Z Series - Z4 M Coupe, Z4 M Roadster

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Genuine BMW - Level 2 Cooling System Refresh Kit - E46 M52, M54 ...
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Genuine BMW - Corporate Logo
T#:369664
Part#: ECSE461711-1
Ships in 5 Business Days
$ 847.99 USD
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$ 847.99 USD
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Genuine BMW Hose Clamp 07129952104
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Genuine BMW - Corporate Logo
T#:6533
Part#: 07129952104
In Stock
$ 3.99 USD
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GENUINE BMW HOSE CLAMP 07129952104
BMW Antifreeze Coolant - 1 Liter Bottle
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Genuine BMW - Corporate Logo
T#:11526
Part#: 82142209769
In Stock
$ 10.51 USD
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This 1 liter bottle is perfect for topping of the coolant in your BMW. This is The use of Original BMW Anti-Freeze/Coolant will ensure sufficient cooling in summer and protection against freeze-ups in winter. BMW Antifreeze/Coolant will also guard your vehicle's various engine components against corrosion. BMW Anti-Freeze/ Coolant will prevent excessive silicate gel precipitation, which may cause plugging of the cooling system and lead to more extensive repairs.
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Water Pump Installation Hardware Kit
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Genuine BMW - Corporate Logo
T#:55209926
Part#: 0071199KT
In Stock
New Item
$ 7.94 USD
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This Genuine BMW water pump installation hardware kit is the exact factory refresh package needed to maintain the structural integrity of your cooling system's plumbing.

E46 323/325/328/330 Manual, Z4 5/05+ OE BMW Radiator
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Genuine BMW - Corporate Logo
T#:5797
Part#: 17119071517
Ships in 2 Business Days
6% off MSRP $ 487.99

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

$ 459.99 USD
6% off MSRP
$ 487.99

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

$ 459.99 USD
This is a Genuine BMW brand replacement radiator for 5/2005-2006 E46 3 series with M54 engine, including 325i, 325Ci, 330i, 330Ci, and Z4 2.5 and 3.0. Save big, while still getting the highest quality radiator available for your BMW.

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 radiator fits the follow BMWs: :
Only for Manual Transmission
5/2005-2006 E46 BMW 325i 325ci 325xi 330i 330ci 330xi- Only for M54 engine
2006-2008 E85 BMW Z4 3.0i Z4 3.0si
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Genuine BMW - Level 2 Cooling System Refresh Kit + Belts - E46 M52, M...
For vehicles with production date from 09/2002
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:369667
Part#: ECSE461711-2
Ships in 5 Business Days
$ 1,090.99 USD
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$ 1,090.99 USD
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A Level 2 kit that includes belt service components

Thermostat Housing Gasket
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Genuine BMW - Corporate Logo
T#:367704
Part#: 11537509357
Ships in 2 Business Days
14% off MSRP $ 9.74

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

$ 8.33 USD
Free Shipping on orders $49 and up
14% off MSRP
$ 9.74

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

$ 8.33 USD
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Needs to be replaced once removed
Genuine BMW Manual Transmission Crossmember
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Genuine BMW - Corporate Logo
T#:6619759
Part#: 22315A0E6F2
Ships in 2 Business Days
4% off MSRP $ 585.99

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

$ 559.99 USD
Free Shipping
4% off MSRP
$ 585.99

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

$ 559.99 USD
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Genuine BMW Gearbox Support - This item fits the following BMW Chassis: E46,E85,E89 Z4

Genuine BMW - Level 1 Expansion Tank Replacement Kit - E46 M52,M54 ...
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Genuine BMW - Corporate Logo
T#:380426
Part#: 17117573781OEKT1
Ships in 2 Business Days
$ 589.99

This product was last offered at the strikethrough price on
07-10-2026

$ 499.99 USD
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$ 499.99 USD
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E46 325ci 06 (M56 Engine) OE BMW Radiator
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Genuine BMW - Corporate Logo
T#:5800
Part#: 17117548432
Ships in 2 Business Days
6% off MSRP $ 648.99

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

$ 610.99 USD
6% off MSRP
$ 648.99

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

$ 610.99 USD

This is a Genuine BMW brand replacement radiator for E46 325ci with M56 engine. Save big, while still getting the highest quality radiator available for your BMW.

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 radiator fits the follow BMWs::
Only for Automatic Transmission
2006 E46 BMW 325ci - Only for M56 engine

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Electric Auxiliary Fan - E46 323I 325I 328I 330I
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Genuine BMW - Corporate Logo
T#:4558
Part#: 64546988913
Ships in 5 Business Days
2% off MSRP $ 938.99

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

$ 915.99 USD
2% off MSRP
$ 938.99

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

$ 915.99 USD
This electric auxiliary fan for BMW E46 3 Series mounts in front of the radiator and is designed to push air through the A/C Condenser and main radiator. It provides additional cooling for when the car is in traffic. It is a common failure item. If your engine temps are creeping up or if your A/C isn't blowing cold this could be the cause.

NOTE: This is the fan that mounts in front of the radiator. It is not the electric engine fan that mounts between the radiator and engine.

This item fits the following BMWs:
1999-2006 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
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Oil Cooler Line O-Ring & Screw Kit
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Genuine BMW - Corporate Logo
T#:55281750
Part#: 1722OCLKT
Ships in 2 Business Days
New Item
$ 20.60 USD
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This Genuine BMW Oil Cooler Line O-Ring & Screw Kit includes the exact factory components required to safely service your oil cooler hard lines.


Bracket - Fan Housing - E46
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Genuine BMW - Corporate Logo
T#:45829
Part#: 17112282209
Ships in 8 Business Days
$ 13.99 USD
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Genuine BMW Bracket, Fan Housing
This item fits the following BMW Chassis:
E46 M3,E46

Fits BMW Engines including:
S54