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BMW Cooling System Parts & Accessories for BMW 7 Series E38 (1995-2001)

Clear BMW chassis

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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Meyle Expansion Tank Cap

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T#:579357

Part#: 3148009004

In Stock

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$ 8.99 USD

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Replace worn or missing pieces.

BMW Expanding Rivet

T#:7436

Part#: 17111712963

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$ 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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Genuine BMW Fan Shroud Bushing

T#:152340

Part#: 64538361938

In Stock

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

$ 13.99 USD

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08-17-2026

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Genuine BMW Bush
This item fits the following BMW Chassis:
E39 M5,E38,E39

Genuine BMW Coolant Bleeder Screw 17111712788

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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Radiator Mount Support - Upper

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T#:377277

Part#: 17111712911

In Stock

$ 1.67 USD

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Secures the upper radiator bracket to core support.

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

Radiator Hose - Lower

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T#:39768309

Part#: 11531741409

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$ 10.00 USD

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$ 10.00 USD

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70-90mm 3/8"/9mm Band Hose Clamp

10X Entries Into Our F80 M3 Sweepstakes

T#:363017

Part#: 003402ECS06A-11

In Stock

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$ 5.24 USD

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Upgrade your BMW with ECS Tuning's Stainless Steel Hose Clamps, designed for convenience and durability. With various band widths and German-style T-bolts, these clamps offer easy adjustment to your required diameter. Say goodbye to dealer pricing and enjoy the quality you love at ECS Tuning.

Full stainless steel construction
Various band widths available
German-style T-bolts for easy adjustment
Convenient solution for hose clamp replacement

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Genuine BMW Idler Pulley Bolt - E53 X5 M62 E31 840Ci E38 740i 740iL ...

T#:33603

Part#: 11281435115

In Stock

$ 11.99 USD

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$ 11.99 USD

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Genuine BMW Fillister-Head Screw - M8X80
This item fits the following BMW Chassis:
E39 M5,E38,E39,E53 X5 X5

Fits BMW Engines including:
M62,S62

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Schwaben 32mm / 36mm Fan Clutch and Oil Filter Cap Open-End Wrench ...

10X Entries Into Our F80 M3 Sweepstakes

T#:361021

Part#: DO-3236

In Stock

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05-02-2026

$ 19.49 USD

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Why buy two tools when you can get one that will do many jobs like this open end wrench? It is great for removing and installing the fan clutch and plastic oil filter cap. Also works great for removing and installing the VAN0S solenoid on M50 engine family. Use the same tools the Turner Motorsport tech's use!

Features:

Made of Chrome Vanadium Steel for strength
32/36mm open end sides

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90-110mm 3/8"/9mm Band Hose Clamp

10X Entries Into Our F80 M3 Sweepstakes

T#:341281

Part#: 003402ECS06A-13

In Stock

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05-02-2026

$ 4.19 USD

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$ 4.19 USD

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ECS Tuning 304 Stainless Steel Hose Clamps

Once again, ECS Tuning has found a way to make life easier for working on your car. Need new hose clamps but don't want to wait to order it from the dealership or pay more than you should for a hose clamp? That's where we come in! These are full 304 stainless steel hose clamps with various band widths for your convenience. They are German style using T-bolts to adjust in size to your required diameter. Never pay dealer pricing again, but still get the quality you love here at ECS Tuning.

Made from high-quality 304 stainless steel for durability
German-style design with T-bolts allows for easy size adjustment
Various band widths for versatile use
Avoid dealership pricing without compromising on quality
Perfect for BMW enthusiasts seeking affordable yet reliable hose clamps

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Genuine BMW Hose Clamp 07129952104

T#:6533

Part#: 07129952104

In Stock

$ 3.99 USD

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GENUINE BMW HOSE CLAMP 07129952104

Gasket Ring

A18X22

T#:6495

Part#: 07119963300

In Stock

$ 1.99 USD

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$ 1.99 USD

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GENUINE BMW GASKET RING 07119963300

1/2"/12mm Band Hose Clamp - 25-40mm - Priced Each

10X Entries Into Our F80 M3 Sweepstakes

T#:385425

Part#: 003402ECS05A-06

In Stock

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$ 3.74 USD

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$ 4.99

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Upgrade Your BMW Maintenance with Stainless Steel Hose Clamps from ECS Tuning

ECS Tuning introduces premium full stainless steel hose clamps, offering superior quality and convenience for your BMW maintenance. Avoid dealership delays and overpricing by choosing from a selection of band widths, ensuring you receive top-quality hose clamps without overpaying.

Key Benefits:

Premium full stainless steel hose clamps
Various band widths for enhanced convenience
High-quality alternative to dealership pricing
Readily available stock eliminates waiting time

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

10X Entries Into Our F80 M3 Sweepstakes

T#:640141

Part#: 13621433077

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$ 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

Rein Expansion Tank Hose - E31, E38, E39

2X Entries Into Our F80 M3 Sweepstakes

T#:375756

Part#: 11531741404

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08-31-2026

$ 8.03 USD

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$ 8.45

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Connects the expansion tank to the radiator

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 in 10 Business Days

$ 3.99 USD

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$ 3.99 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.

URO Water Pump O-Ring (Small) - BMW M60 M62 S62 M70 S70

2X Entries Into Our F80 M3 Sweepstakes

T#:377294

Part#: 11531710055

Ships in 2 Business Days

$ 1.01 USD

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$ 1.01 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 specific ring is used when replacing water pump on cooling pipe to the water accumulator. There are two per car.

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FAE Coolant Temperature Sensor - E31, E36, E38, E39, E52, E53, Z3 ...

Located on the water pump housing

T#:374002

Part#: 13621703993

In Stock

$ 15.99 USD

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$ 15.99 USD

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Monitors coolant temperature

Febi Coolant Level Sensor - E31, E38, E39

We Price Match - Give Us A Call or Chat!

T#:341632

Part#: 61318360876

In Stock

$ 14.99 USD

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$ 14.99 USD

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Monitors the coolant level in the expansion tank

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

2X Entries Into Our F80 M3 Sweepstakes

T#:340541

Part#: 17111742231

Ships in 2 Business Days

Sale - Save 5% $ 17.99

This product was last offered at the strikethrough price on
08-31-2026

$ 17.09 USD

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$ 17.99

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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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Genuine BMW Thermostat With Housing - E39 540i

For vehicles with production date up to 09/1998

T#:360671

Part#: 11531437526

In Stock

Sale - Save 8% $ 193.99

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

$ 177.99 USD

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This product was last offered at the strikethrough price on
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$ 177.99 USD

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Don't take chances! Proper maintenance is required to keep your BMW performing at peak levels. The thermostat basically controls when your car will overheat. The sensor on the housing is also used by the engine computer to set the fuel mapping on the engine. A faulty sensor or thermostat will lead to the engine running rich (too much fuel).

This item fits the following BMWs:
up to 09/1999 E38 BMW 740i 740il
up to 09/1999 E39 BMW 540i

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Red Line Water Wetter Coolant Additive

T#:394769

Part#: REDLINE5A

In Stock

Starting at $ 15.99 USD

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Starting at $ 15.99 USD

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Water Wetter is a unique wetting agent for cooling systems which reduces coolant temperatures by as much as 30*F. This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol-based antifreeze.

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Genuine BMW Isa Screw - 07129905494

T#:28891

Part#: 07129905494

In Stock

5% off MSRP $ 7.74

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

$ 7.33 USD

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5% off MSRP

$ 7.74

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

$ 7.33 USD

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Genuine water pump hardware. M6x16-8.8. 6 of these screws are found in association with the water pump

Universal 12" Electric Puller Fan - Black

T#:598797

Part#: 30102029

In Stock

$ 207.99 USD

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$ 207.99 USD

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1328 CFM. High performance puller fan with curved 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: 13.25in x 12.5in x 3.5n Airflow (CFM): 1328

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Mishimoto Universal Fan Mount Kit

T#:363171

Part#: MMFANMOUNT

In Stock

$ 15.99 USD

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$ 15.99 USD

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The Mishimoto universal fan mount kit is used to mount a Mishimoto electric fan to any Mishimoto aluminum radiator. Great for custom applications, the Mishimoto fan can be mounted in any convenient position on the radiator. Universal fan mount fits any Mishimoto electric fan Ideal for custom applications Mounts fan in any convenient position Mishimoto Lifetime Warranty

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Band Hose Clamp | 12-20mm 3/8"/9mm

10X Entries Into Our F80 M3 Sweepstakes

T#:304266

Part#: 003402ECS06A-03

In Stock

Sale - Save 25% $ 4.99

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

$ 3.74 USD

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$ 4.99

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Secure hoses in your BMW effortlessly with the ECS 3/8" / 9mm Band Hose Clamp (12-20mm). Specifically designed for BMW models, this clamp ensures a snug fit and reliable hold for hoses measuring between 12mm to 20mm. Crafted with durable materials, these clamps provide exceptional resistance against leaks and are ideal for various automotive applications. Upgrade your BMW's hose security with these reliable ECS hose clamps.

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Schwaben Radiator/ Intercooler Fin Comb

10X Entries Into Our F80 M3 Sweepstakes

T#:384260

Part#: 015326SCH01A

In Stock

Sale - Save 29% $ 20.99

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

$ 14.99 USD

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Straighten bent fins in heat exchangers like radiators, condensers, and intercoolers obstruct air flow and reduce heat transfer. Paper-thin fins are easily bent, even by slight pressure.

60-80mm 1/2"/12mm Band Hose Clamp

10X Entries Into Our F80 M3 Sweepstakes

T#:377836

Part#: 003402ECS05A-10

In Stock

Sale - Save 25% $ 6.99

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

$ 5.24 USD

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$ 5.24 USD

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ECS Tuning Stainless Steel Hose Clamps for BMW

Upgrade your BMW's hose clamps with ECS Tuning Stainless Steel Hose Clamps, designed for convenience and durability. Say goodbye to long waits and overpriced dealership clamps. With various band widths available, these stainless steel clamps ensure a secure fit for your vehicle's hoses.

Benefits:

Convenient replacement for worn-out hose clamps
Made of durable stainless steel for long-lasting performance
Available in various band widths for versatile use
Affordable alternative to dealership pricing

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77-85mm - 3/4" Band Hose Clamp

10X Entries Into Our F80 M3 Sweepstakes

T#:377877

Part#: 003402ECS07A-05

In Stock

Sale - Save 25% $ 25.99

This product was last offered at the strikethrough price on
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$ 19.49 USD

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$ 25.99

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Upgrade your BMW's hose clamps with the 77-85mm - 3/4" Band Hose Clamp from Turner Motorsport. These full 304 stainless steel clamps offer convenience and quality without the dealership price tag. German-style T-bolts allow for easy adjustment to your required diameter, ensuring a secure fit every time.

Made of durable 304 stainless steel for long-lasting performance
German-style T-bolt design for easy size adjustment
Convenient band widths for versatile applications
Quality alternative to dealership pricing

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Coolant Temperature Sender - 2 Pin

Located in the water accumulator Located in the cylinder head

T#:379619

Part#: 12621747281

Ships in 4 Business Days

$ 8.99 USD

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$ 8.99 USD

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Expansion Tank Vent Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:373096

Part#: 17111737819

Ships in 2 Business Days

$ 9.99 USD

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$ 9.99 USD

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Attaches between expansion tank and top of radiator

Radiator Pressure Test kit 14 pc

T#:3629267

Part#: ATD3300

Ships in 7 Business Days

$ 497.99 USD

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$ 497.99 USD

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Adapters for most European and domestic vehicles

DPH O-Ring - E38, E39

For vehicles with production date from 09/1998

T#:35985

Part#: 11537501777

In Stock at Vendor

$ 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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Cooling system O-ring for hose from water pump for E38 E39

Rein Radiator Hose - Upper - E38

2X Entries Into Our F80 M3 Sweepstakes

T#:591793

Part#: 11531741408

Ships in 2 Business Days

Sale - Save 5% $ 13.99

This product was last offered at the strikethrough price on
08-31-2026

$ 13.29 USD

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$ 13.99

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Hose from radiator to water pump

Coolant Level Switch - E31 E38 E39 Z8

2X Entries Into Our F80 M3 Sweepstakes

T#:20203

Part#: 61318360876

Ships in 2 Business Days

$ 12.99

This product was last offered at the strikethrough price on
04-10-2026

$ 10.99 USD

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$ 10.99 USD

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This is the radiator coolant level sensor that mounts into the bottom of the cooling system expansion tank. With more than 4,000 European vehicle replacement parts, URO is no stranger to the market. Superior metal stock and extremely strict quality control are at the forefront of URO’s agenda and it shows as they become the OE supplier for more and more car companies every single day.

With more than 4,000 European vehicle replacement parts, URO is no stranger to the market. Superior metal stock and extremely strict quality control are at the forefront of URO’s agenda and it shows as they become the OE supplier for more and more car companies every single day.

This item fits the following BMWs:
1999-2000 E39 BMW 528i 540i
2001-2003 E39 BMW 525i 530i 540i
1995-2001 E38 BMW 740i 740il 750il
1990-1998 E31 BMW 840i 840ci
2000-2003 E52 BMW Z8 Roadster

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Vaico Coolant Hose - Radiator Outlet Hose to Trans Cooler - BMW E38 E...

We Price Match - Give Us A Call or Chat!

T#:595257

Part#: 11531711384

Ships in 2 Business Days

$ 129.99

This product was last offered at the strikethrough price on
05-08-2026

$ 125.99 USD

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$ 125.99 USD

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This hose connects the radiator outlet hose to the transmission heat exchanger

CSF Universal Large Single-Pass Oil Cooler - Universal Application ...

2X Entries Into Our F80 M3 Sweepstakes
Universal fitment design - modifications may be necessary to run this cooler

T#:53608839

Part#: 8371

Ships in 4 Business Days

$ 499.00 USD

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$ 499.00 USD

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CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.

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Rein Thermostat Assembly E38 740iL

2X Entries Into Our F80 M3 Sweepstakes

T#:34114233

Part#: 11531437526

Ships in 2 Business Days

Sale - Save 5% $ 68.99

This product was last offered at the strikethrough price on
08-31-2026

$ 65.54 USD

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Regulates Engine coolant temperature. Comes with aluminum housing, O-ring, and sensor.

Water Temperature Sensor

Located in the water accumilator

2X Entries Into Our F80 M3 Sweepstakes

T#:372926

Part#: 12621288158

Ships in 2 Business Days

$ 6.99 USD

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$ 6.99 USD

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Replace the sensor to get your gauge working properly again.

Rein O-RING 14.4X3.0 - E38, E39

2X Entries Into Our F80 M3 Sweepstakes

T#:379805

Part#: 11537501777

Ships in 4 Business Days

Sale - Save 17% $ 6.99

This product was last offered at the strikethrough price on
08-31-2026

$ 5.80 USD

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$ 6.99

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$ 5.80 USD

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Radiator Hose - Lower - E38/E39

2X Entries Into Our F80 M3 Sweepstakes

T#:50066847

Part#: 11537505229

Ships in 2 Business Days

$ 41.99 USD

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$ 41.99 USD

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Connects from the lower radiator outlet to the thermostat housing and features an integrated port for the coolant temperature sensor.

Universal 10" Electric Fan - Black

T#:378434

Part#: MMFAN10

Ships in 4 Business Days

$ 88.99 USD

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$ 88.99 USD

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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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Rein Coolant Return line - E38

2X Entries Into Our F80 M3 Sweepstakes

T#:591958

Part#: 17111737708

Ships in 4 Business Days

Sale - Save 6% $ 9.17

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

$ 8.61 USD

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$ 9.17

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

$ 8.61 USD

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From expansion tank to radiator

Coolant Hose

For vehicles with production date up to 09/1998

2X Entries Into Our F80 M3 Sweepstakes

T#:373027

Part#: 11531745595

Ships in 2 Business Days

$ 13.99 USD

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$ 13.99 USD

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Connects from water pump to top of radiator

OEM Rein Heating Core Return Hose - E38 740i/il

2X Entries Into Our F80 M3 Sweepstakes

T#:375753

Part#: 64218390319

Ships in 2 Business Days

Sale - Save 5% $ 7.63

This product was last offered at the strikethrough price on
08-31-2026

$ 7.25 USD

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Sale - Save 5%

$ 7.63

This product was last offered at the strikethrough price on
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$ 7.25 USD

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Attaches to the water pipe on the back of the engine block to the secondary water pump. Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

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Meistersatz Water Temperature Sensor - E31, E32, E34, E38

Located in the water accumilator

T#:379615

Part#: 12621288158

Ships in 4 Business Days

$ 7.99 USD

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$ 7.99 USD

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M14x1.5 Thread

OEM Rein Coolant Hose - E38 E39 M62 4.4L

For vehicles with production date from 09/1998

2X Entries Into Our F80 M3 Sweepstakes

T#:375752

Part#: 11537511207

Ships in 4 Business Days

Sale - Save 34% $ 25.83

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

$ 17.09 USD

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Sale - Save 34%

$ 25.83

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

$ 17.09 USD

Add to Wish List

Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

Fan mounting pin - priced each

T#:598910

Part#: 30130013

In Stock at Vendor

$ 6.99 USD

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$ 6.99 USD

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Wire pin used to mount electric fan directly to radiator.

OE Rein Upper Radiator Hose - E39 540i, E38 740i/IL 1996-1998 ...

2X Entries Into Our F80 M3 Sweepstakes

T#:6976

Part#: 11531745595

Ships in 4 Business Days

Sale - Save 5% $ 16.99

This product was last offered at the strikethrough price on
08-31-2026

$ 16.14 USD

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Qty

Sale - Save 5%

$ 16.99

This product was last offered at the strikethrough price on
08-31-2026

$ 16.14 USD

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ENGINE WATER HOSE 11531745595.--

This item fits the following BMWs:
BMW 5 Series - 540i, 540i Wagon
BMW 7 Series - 740i, 740iL

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