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BMW Cooling System Parts & Accessories for BMW E39 M5 S62 5.0L

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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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Thermostat Replacement Kit - E39 M5

10X Entries Into Our F80 M3 Sweepstakes

T#:554086

Part#: 11537835558KT7

Ships in 3 Business Days

$ 170.99

This product was last offered at the strikethrough price on
04-21-2026

$ 158.99 USD

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$ 158.99 USD

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When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

Behr thermostat with gasket
Thermostat mounting hardware
1 Gal Genuine BMW coolant

This thermostat fits the following BMWs:
1998-2004 E39 BMW M5

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Complete Cooling System Overhaul Package - 2000-2003 E39 M5

10X Entries Into Our F80 M3 Sweepstakes

T#:338714

Part#: TMS14418

Ships in 3 Business Days

$ 1,201.99

This product was last offered at the strikethrough price on
06-05-2026

Starting at $ 1,132.44 USD

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Starting at $ 1,132.44 USD

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This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package. This cooling system package is for the 1999-2003 E39 M5 with the S62 engine.

A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the thermostat housing, radiator, and waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your entire cooling system. Keep on top of the cooling needs of your engine for your own piece of mind. Potential buyers also see the upside of a properly maintained car with receipts. Our bundled package includes the following:

OEM Behr radiator

OEM Laso or OE BMW water pump with gasket

OE BMW coolant temp sensor (located in the water pump housing)

OEM Behr thermostat with o-ring

OE BMW o-rings for the inner coolant tubes

OE BMW expansion tank cap

OE BMW upper and lower radiator hoses with OE-style clamps

OE BMW expansion tank hose with OE-style clamps
Optional items (which can be added below):
- OE BMW antifreeze
- Add a new coolant level sensor (known for failing / throwing "check coolant" messages)
- Add a new plastic expansion tank (if it's never been changed it's a risk of a crack or leak)
- Add a new fan clutch

Buy as a package and save $$$!

This cooling system overhaul kit fits the following BMWs:
1999-2003 E39 BMW M5

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Cooling System Overhaul Kit - E39 M5

10X Entries Into Our F80 M3 Sweepstakes

T#:554556

Part#: 17111436062KT2

Back Ordered

$ 2,392.99

This product was last offered at the strikethrough price on
08-14-2026

$ 2,317.99 USD

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$ 2,317.99 USD

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This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package. This cooling system package is for the 1999-2003 E39 M5 with the S62 engine.

A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the thermostat housing, radiator, and waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your entire cooling system. Keep on top of the cooling needs of your engine for your own piece of mind. Potential buyers also see the upside of a properly maintained car with receipts.

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URO Fan Blade - BMW E3X

2X Entries Into Our F80 M3 Sweepstakes

T#:373133

Part#: 11521712110

Ships in 1 Business Day

$ 33.99 USD

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$ 33.99 USD

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Replace your fragile fan blades before they break and damage your radiator.

E39 M5 00-03 OEM Behr Radiator

T#:1341

Part#: 17111436062

Ships in 1 Business Day

$ 327.54

This product was last offered at the strikethrough price on
08-14-2026

$ 277.71 USD

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$ 277.71 USD

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OEM BEHR brand replacement radiator for all E39 M5, as produced in 2000, 2001, 2002 and 2003. This radiator is made by BEHR, an original equipment supplier to BMW. BEHR radiators are what we use our own BMWs and customer installs. We've found the BEHR radiator has the highest lifespan, least amount of manufacturing defects, and best continued cooling performance on the E39 M5. Simply put, you do not want anything else in your M5 but a BEHR brand radiator.

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 BEHR radiator fits the following BMWs:
2000-2003 E39 M5 sedan

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Electric Auxiliary Fan - E39 1999-2003

T#:377040

Part#: 64546921395

Ships in 1 Business Day

$ 416.64

This product was last offered at the strikethrough price on
03-09-2026

$ 333.47 USD

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$ 333.47 USD

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This electric auxiliary fan for BMW E39 525i 528i 530i 540i M5 1999-2003 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.

This item fits the following BMWs:
1999-2003 E39 BMW 525i 528i 530i 540i M5

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OEM Mahle-Behr Fan Clutch - E39 M5, Z8

T#:373957

Part#: 11527830486

Ships in 1-2 days

$ 374.99

This product was last offered at the strikethrough price on
08-27-2026

$ 360.00 USD

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$ 360.00 USD

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This OEM Mahle-Behr fan clutch is a direct replacement for your original fan clutch. Has your fan clutch failed or is beginning to fail? A failing fan clutch will cause the engine fan to either not turn at all, or to turn very slowly and lifelessly, providing insufficient cooling for the radiator (especially noticeable while idling or in stop/go traffic).

This item fits the following BMWs:
1998-2003 E39 BMW M5
2000-2003 E52 BMW Z8 Roadster

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Radiator Fan Clutch

2X Entries Into Our F80 M3 Sweepstakes

T#:388739

Part#: 11527830486

Ships in 1 Business Day

$ 62.74 USD

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$ 62.74 USD

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The fan clutch adjusts the speed of the fan based on the rotational speed of the engine. When unneeded, the fan clutch reduces rotational load and drag. If you have a mechanical fan and your vehicle runs a little hotter than it should in traffic, this may be your solution.

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Radiator Mount Support - Upper

2X Entries Into Our F80 M3 Sweepstakes

T#:377277

Part#: 17111712911

In Stock

$ 1.67 USD

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$ 1.67 USD

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Secures the upper radiator bracket to core support.

Radiator Drain Plug

2X Entries Into Our F80 M3 Sweepstakes

T#:577887

Part#: 17111712339

In Stock

$ 4.77 USD

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$ 4.77 USD

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These drain plugs are made of plastic and can be easily fatigued and cracked. Save your self the trouble of finding out too late, that yours is damaged and not usable.

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

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

T#:2766

Part#: 17111742231

Ships in 4 Business Days

$ 20.99

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

$ 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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URO Coolant Temperature Sensor - BMW M44 M52 M62 M73 M54 S62 S50 S52 ...

Located on the water pump housing

2X Entries Into Our F80 M3 Sweepstakes

T#:639497

Part#: 13621703993

In Stock

$ 12.99 USD

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$ 12.99 USD

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URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts. As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Rubber Mount

2X Entries Into Our F80 M3 Sweepstakes

T#:362393

Part#: 17111737704

Ships on Sep 23, 2026

$ 7.99 USD

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$ 7.99 USD

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Rubber lower mount for your radiator

Auxiliary Fan Switch

2X Entries Into Our F80 M3 Sweepstakes

T#:376847

Part#: 13621433077

Ships in 1 Business Day

$ 10.99 USD

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$ 10.99 USD

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Comes with related o-ring

URO Air Temperature Sensor - BMW X5 M5 525i 528i 530i 540i

2X Entries Into Our F80 M3 Sweepstakes

T#:592644

Part#: 64118391392

Back Ordered

$ 7.99 USD

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Qty

$ 7.99 USD

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URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts.

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