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BMW Cooling System Parts & Accessories for BMW E46 M3 S54 (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 Radiator Return Line - 32412282353 - E46,E46 M3

T#:12524

Part#: 32412282353

Ships in 1 day

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

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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

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

Genuine BMW Radiator - E46 M3

T#:13727086

Part#: 17115A7DEF2

Ships in 1-2 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

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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

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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 Support - Right - E46, E83 X3, Z4

T#:13187

Part#: 17117530254

Ships in 5 Business Days

4% 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.

$ 53.99 USD

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4% 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.

$ 53.99 USD

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Engineered to official BMW standards, this high strength plastic bracket locks the radiator into place while allowing necessary thermal movement, preventing stressed hose fittings or fatigue on radiator core seams. Ideal for cooling system overhauls, front end repairs, or replacing aged hardware, this genuine service part restores structural integrity to your front end cooling setup.

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Genuine BMW Temperature Switch for Control Unit Housing (E-Box) (35 d...

T#:14858

Part#: 12521741900

Ships in 1-2 days

6% off MSRP $ 82.99

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

$ 77.99 USD

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6% off MSRP

$ 82.99

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

$ 77.99 USD

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Genuine BMW Temperature Switch - 35 Cel
This item fits the following BMW Chassis:
E39 M5,E46 M3,E38,E39,E46,E53 X5 X5,E85 Z4

Fits BMW Engines including:
M52,M54,M56,M60,M62,M73,M73N,S54,S62

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Genuine BMW Auxiliary Fan Assembly - E46 M3

T#:20181

Part#: 64546988914

Ships in 1-2 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

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2% off MSRP

$ 938.99

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$ 915.99 USD

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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

T#:150725

Part#: 64216902678

Ships in 1-2 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

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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

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

Nissens Radiator - E46

T#:394205

Part#: 17102228941

Special Order: No Guaranteed ETA

$ 619.99 USD

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$ 619.99 USD

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Aftermarket radiator for your E46 M3

Bremmen Parts Water Pump - E46 M3 S54

10X Entries Into Our F80 M3 Sweepstakes

T#:36981065

Part#: 11517838159

Ships on Dec 2, 2026

Sale - Save 20% $ 138.99

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

$ 110.97 USD

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Sale - Save 20%

$ 138.99

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

$ 110.97 USD

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A failing water pump is a recipe for engine overheating and costly internal damage. Keep your coolant flowing and your engine protected by replacing your aging pump with this high-quality OE unit from Bremmen Parts.

Water pump replacement is suggested at 60,000 - 80,000 miles.

This pump includes the alignment dowel, sealing gasket, and thermostat sealing o-ring. We recommend picking up a water pipe sealing o-ring (11537830712) and thermostat (11531318274) for a comprehensive service.

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Genuine BMW Fan Blade

T#:360662

Part#: 11521712058

Ships in 1 day

3% off MSRP $ 104.99

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

$ 101.99 USD

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3% off MSRP

$ 104.99

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

$ 101.99 USD

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Gates Radiator Hose - Upper - E46

T#:362110

Part#: 11537830716

Ships in 2 Business Days

$ 48.99

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

$ 46.99 USD

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$ 46.99 USD

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Connects the radiator to the thermostat housing

Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:640140

Part#: 17111712788

Ships on Dec 24, 2026

Sale - Save 39% $ 3.99

This product was last offered at the strikethrough price on
09-02-2026

$ 2.44 USD

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Sale - Save 39%

$ 3.99

This product was last offered at the strikethrough price on
09-02-2026

$ 2.44 USD

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Plastic bleeder screw for cooling system is used to bleed air that would otherwise create an air pocket and lead to overheating. Includes o-ring seal.

Fan Delete Nut

T#:3459

Part#: 11511310640

In Stock

$ 17.99 USD

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$ 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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Febi Temperature Sensor

We Price Match - Give Us A Call or Chat!

T#:340711

Part#: 13621433076

In Stock

$ 17.99

This product was last offered at the strikethrough price on
06-22-2026

$ 16.99 USD

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$ 16.99 USD

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Monitors coolant / oil temperature

BMW Brass Coolant Bleeder Screw - Priced Each

2X Entries Into Our F80 M3 Sweepstakes

T#:587673

Part#: 17111712788PRM

In Stock

$ 5.35 USD

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$ 5.35 USD

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Having an operational bleeder screw for your coolant system assures that when service is performed, all air pockets are removed. Having air pockets in your coolant system prevents your system from functioning properly. Your heat may not work as well and there is the potential for engine overheating if the air pocket is trapped behind the thermostat. Be sure that all of the air is bled out of your system with a new bleeder screw.

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Radiator Support Bracket

T#:371231

Part#: 17117514402

In Stock

$ 7.99

This product was last offered at the strikethrough price on
06-19-2026

$ 5.09 USD

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$ 5.09 USD

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Bremmen Auxiliary Fan Temperature Switch - E46 E39 E9X E60 E70 E53 ...

Mounted in upper radiator hose, controls operation of auxiliary fan

10X Entries Into Our F80 M3 Sweepstakes

T#:640141

Part#: 13621433077

In Stock

Sale - Save 20% $ 20.99

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

$ 16.79 USD

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Sale - Save 20%

$ 20.99

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

$ 16.79 USD

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The auxiliary fan switch activates the auxiliary cooling fan to provide additional cooling under high heat loads, and when the car is stationary

Temperature Sensor

2X Entries Into Our F80 M3 Sweepstakes

T#:37892090

Part#: 13621433076

In Stock

$ 10.34 USD

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$ 10.34 USD

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Temperature sensor for monitoring coolant and oil

Wahler Thermostat O-Ring - E46, Z3, Z4

T#:362366

Part#: 11531318402

Ships in 3 Business Days

$ 6.17 USD

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$ 6.17 USD

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BMW does not include a o-ring with their new thermostats

Genuine BMW O-Ring - Priced Each

T#:367933

Part#: 17222245358

In Stock

$ 3.99 USD

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$ 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

T#:13012

Part#: 11537830709

In Stock

$ 6.99 USD

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$ 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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OEM Rein Expansion Tank Cap - BMW E32 E34 E36 E38 E39 E46 & More ...

2X Entries Into Our F80 M3 Sweepstakes

T#:340541

Part#: 17111742231

Back Ordered

$ 17.99 USD

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$ 17.99 USD

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This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.

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OEM Behr Coolant Expansion Tank Cap 2.0 Bar - E36 E46 E34 E39 E32 E38...

T#:2766

Part#: 17111742231

In Stock

$ 20.99

This product was last offered at the strikethrough price on
09-10-2026

$ 19.99 USD

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$ 19.99 USD

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This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.

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.

This item fits the following BMWs:
1990-1991 E30 BMW 318i 318is 318ic
1992-1998 E36 BMW 318i 318is 318ic 323is 323ic 325i 325is 325ic 328i 328is M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
1989-1995 E34 BMW 530i 535i 540i M5
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i 540i M5
1989-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li
1990-1998 E31 BMW 840i 840ci 850i 850ci 850csi
2004-2011 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2000-2006 E53 BMW X5 30.0i X5 4.4i X5 4.6is X5 4.8is
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Coupe M Roadster
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si M Roadster M Coupe
2000-2003 E52 BMW Z8 Z8 Alpina
2007+ E90 BMW 335i & 335xi

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Genuine BMW Hose Clamp 07129952104

T#:6533

Part#: 07129952104

In Stock

$ 3.99 USD

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$ 3.99 USD

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GENUINE BMW HOSE CLAMP 07129952104

Genuine BMW Coolant Bleeder Screw 17111712788

T#:7432

Part#: 17111712788

Ships in 1-2 days

$ 5.94 USD

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$ 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 Antifreeze Coolant - 1 Liter Bottle

T#:11526

Part#: 82142209769

In Stock

$ 10.60

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

$ 10.57 USD

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$ 10.57 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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Rein Coolant Bleeder Screw CHW1575 - Priced Each

2X Entries Into Our F80 M3 Sweepstakes

T#:591955

Part#: 17111712788

In Stock

$ 4.99 USD

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$ 4.99 USD

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Coolant Bleeder Screw is a critical component for maintaining your BMW’s cooling system. Designed to release trapped air from the coolant lines, this screw ensures efficient coolant flow and prevents overheating. Specifically engineered for BMW models, it enhances the overall performance and longevity of your engine by maintaining proper temperature regulation. Comes with O-Ring.

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Auxiliary Fan Switch O-Ring

2X Entries Into Our F80 M3 Sweepstakes

T#:377077

Part#: 13621433077S

In Stock

$ 0.88 USD

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$ 0.88 USD

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Now you can just replace the o-ring instead of the whole switch

BMW Expanding Rivet

T#:7436

Part#: 17111712963

In Stock

$ 1.99 USD

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$ 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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Meyle Expansion Tank Cap

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:579357

Part#: 3148009004

In Stock

Sale - Save 40% $ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD

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Sale - Save 40%

$ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD

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Replace worn or missing pieces.

Febi Freeze Plug - 11111714712

We Price Match - Give Us A Call or Chat!

T#:6570

Part#: 11111714712

In Stock

$ 3.99

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

$ 2.03 USD

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$ 2.03 USD

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ENGINE COVER LID 11111714712

Radiator Mount

2X Entries Into Our F80 M3 Sweepstakes

T#:56977984

Part#: 17117514402

Ships in 2 Business Days

$ 6.99 USD

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$ 6.99 USD

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Maintain cooling system stability under spirited street driving and hard track use with this URO Parts replacement upper radiator mount bracket.

Expansion Tank Mounting Clamp

2X Entries Into Our F80 M3 Sweepstakes

T#:591954

Part#: 17111707777

Ships in 2 Business Days

$ 6.99 USD

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$ 6.99 USD

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Locks the expansion tank into the mounting plate via the large hole in the bottom of the tank

Water Pump O-Ring

2X Entries Into Our F80 M3 Sweepstakes

T#:555320

Part#: 11537830709

In Stock

$ 2.99 USD

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$ 2.99 USD

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When it comes time to replace the water pump, be sure to replace all the O-Rings associated with it to ensure that your car stays leak free. If you are experiencing leaking issues, be sure to inspect these rings, as they might have worn down. This is used on the return pipe to the thermostat housing

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Oil Cooler Line O-Ring & Screw Kit

T#:55281750

Part#: 1722OCLKT

Ships in 1 day

$ 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.

Water Pump Installation Hardware Kit

T#:55209926

Part#: 0071199KT

Ships in 1-2 days

$ 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.

O-RING

T#:580584

Part#: C32348

Ships in 2 Business Days

$ 3.99

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

$ 2.99 USD

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$ 2.99 USD

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Bracket - Fan Housing - E46

T#:45829

Part#: 17112282209

Ships in 8 Business Days

$ 13.99 USD

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$ 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

Elring Thermostat O-Ring - BMW S54 3.2L

2X Entries Into Our F80 M3 Sweepstakes

T#:45278657

Part#: 293.300

Special Order: No Guaranteed ETA

$ 3.99 USD

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$ 3.99 USD

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Seals the thermostat and thermostat housing to the water pump Replaces BMW # 11531318402

Bremmen Engine Fan Blade - 11 Blades, 420mm - BMW M30 S38 M50 M52 S5...

10X Entries Into Our F80 M3 Sweepstakes

T#:640149

Part#: 11521712058

In Stock

Sale - Save 22% $ 23.99

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

$ 18.76 USD

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Sale - Save 22%

$ 23.99

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

$ 18.76 USD

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This fan is driven by the serpentine belt, engaged by the fan clutch. If you have bad motor mounts, it's quite common for the blades of this fan to make contact with the radiator or radiator shroud, essentially self-destructing the fan into many pieces. Be sure to get a new fan clutch, while you are replacing this.

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Radiator Fan Clutch

10X Entries Into Our F80 M3 Sweepstakes

T#:57304041

Part#: 11527831619

Ships on Dec 29, 2026

$ 75.99 USD

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$ 75.99 USD

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Thermostat - 80°C

10X Entries Into Our F80 M3 Sweepstakes

T#:57507417

Part#: 11531318274

Ships on Jan 6, 2027

$ 59.99 USD

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$ 59.99 USD

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Auxillary Fan Switch

Mounted in upper radiator hose, controls operation of auxiliary fan

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:4934936

Part#: 3148210000

Ships on Oct 14, 2026

$ 18.99 USD

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$ 18.99 USD

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The auxiliary fan switch activates the auxiliary cooling fan to provide additional cooling under high heat loads, and when the car is stationary. Also known as the coolant temperature sending unit, comes with related o-ring

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Fluid Level Sensor

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:5973204

Part#: 17117546548

Ships on Oct 14, 2026

$ 13.99 USD

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$ 13.99 USD

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MEYLE-ORIGINAL: True to OE fluid level sensor. Used in multiple locations. Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. Comparable OE Cross Reference - 17117546548

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Coolant Flange - Rear/Engine Block

Fits European models only

5X Entries Into Our F80 M3 Sweepstakes

T#:55533481

Part#: 11531708808

Ships on Oct 14, 2026

$ 9.99 USD

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$ 9.99 USD

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This Meyle Original-grade replacement coolant flange is the perfect solution for refreshing your BMW’s cooling plumbing back to factory-fresh operation.

Meistersatz Temperature Sensor

T#:379740

Part#: 13621433076

In Stock at Vendor

$ 15.99 USD

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$ 15.99 USD

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Monitors coolant / oil temperature

Radiator Support Bracket

2X Entries Into Our F80 M3 Sweepstakes

T#:14122755

Part#: 17117514402

Back Ordered

$ 8.99

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

$ 8.24 USD

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$ 8.24 USD

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Mounts to top of radiator bracket, 2 per vehicle.

Lower Radiator Mount - Priced Each

T#:361005

Part#: 17111178412

Back Ordered

$ 2.03 USD

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Qty

$ 2.03 USD

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This is the small lower rubber mount that goes on the bottom of the radiator. These mounts sit down into mount 17111723337. Fits left or right side - priced each

BMW Radiator Hose Kit - 11537830715

2X Entries Into Our F80 M3 Sweepstakes

T#:46719180

Part#: CHK0376R

Ships in 4 Business Days

$ 43.99 USD

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$ 43.99 USD

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Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.

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Auxiliary Fan Switch

Mounted in upper radiator hose, controls operation of auxiliary fan

2X Entries Into Our F80 M3 Sweepstakes

T#:376847

Part#: 13621433077

Back Ordered

$ 10.99 USD

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Qty

$ 10.99 USD

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