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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 Thermostat With Housing - M52 M54

T#:360689

Part#: 11537509227

In Stock

Sale - Save 8% $ 169.69

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

$ 156.96 USD

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$ 169.69

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

$ 156.96 USD

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Genuine BMW Radiator Support Bracket - E92 Z4 E65 E60 E53 E46 E66 E83...

T#:21736

Part#: 17117514402

Ships in 3 Business Days

Sale - Save 8% $ 26.99

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$ 24.86 USD

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$ 26.99

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

$ 24.86 USD

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Genuine BMW Bracket F.Radiator
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E53 48IS,E46,E53 X5 X5,E65,E83 X3,E85 Z4,E86 Z4,E90,E92,E93

Genuine BMW Radiator Bracket - Lower - E46

T#:21734

Part#: 17111436264

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Sale - Save 10% $ 33.99

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$ 30.54 USD

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$ 33.99

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

$ 30.54 USD

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Genuine BMW Bracket F.Radiator
This item fits the following BMW Chassis:
E46 M3,E46,E85 Z4

Fits BMW Engines including:
M52,M54,M56,S54

Genuine BMW Coolant Pipe - E46 M3

T#:13013

Part#: 11537830711

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Sale - Save 8% $ 154.99

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$ 143.23 USD

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$ 154.99

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

$ 143.23 USD

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

Fits BMW Engines including:
S54

Genuine BMW Heater Hose

T#:14120

Part#: 64218363198

In Stock

Sale - Save 21% $ 45.99

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$ 36.50 USD

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$ 45.99

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

$ 36.50 USD

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BMW Hose F Water Valve And Radiator -
This item fits the following BMW Chassis:
E46

Genuine BMW Water Pump Pulley

T#:4472

Part#: 11511436590

In Stock

Sale - Save 7% $ 73.99

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

$ 68.99 USD

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$ 73.99

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

$ 68.99 USD

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SEE T#337981

Genuine BMW Coolant hose - E46 M3

T#:150726

Part#: 64216902679

Ships in 3 Business Days

Sale - Save 8% $ 34.99

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$ 32.31 USD

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$ 34.99

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

$ 32.31 USD

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

Genuine BMW Water Pipe - E46 325xi 330xi E53 X5 M54 E83 X3 M54 ...

T#:367703

Part#: 11537502000

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Sale - Save 75% $ 221.99

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$ 54.77 USD

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This product was last offered at the strikethrough price on
04-06-2026

$ 54.77 USD

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Expansion Tank Mounting Bracket - E46 E85 Z4 - Auto Trans

For vehicles with automatic transmission only

T#:12560

Part#: 17111436251

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Sale - Save 51% $ 205.99

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

$ 101.32 USD

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$ 205.99

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

$ 101.32 USD

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This Genuine BMW part is the mounting bracket from the radiator to the expansion tank on E46 3 series and E85/E86 Z4 with Automatic 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
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si

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Hex Bolt & Washer Kit

T#:55245856

Part#: 0711990XXKTKT

Ships in 3 Business Days

$ 35.31 USD

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$ 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.

Water Pump Installation Hardware Kit

T#:55209926

Part#: 0071199KT

In Stock

$ 8.59 USD

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$ 8.59 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.

Oil Cooler Line O-Ring & Screw Kit

T#:55281750

Part#: 1722OCLKT

Ships in 3 Business Days

$ 20.60 USD

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$ 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.

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