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BMW Cooling System Parts & Accessories for BMW 7 Series E65 (2002-2008)

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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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OEM Style Hose Clamps

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T#:338927

Part#: HOSE-CLAMPS

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Hose clamps for radiator hoses, coolant hoses, vacuum hoses, or intake hoses. These hose clamps are the same style as your OEM hoses with a smooth inside band to prevent cutting into the hose material.

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Performance Thermostat - 90C - N62, N63, S63, N73, S55

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T#:637061

Part#: 11537586885

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$ 75.06 USD

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Includes housing and sealing o-ring A thermostat that opens sooner promotes better cooling in your vehicle. Running a lower temperature thermostat will keep everything much cooler. Keeping the engine cooler will help reduce and improve the life of the seals in your engine, saving you time and money, while also helping to increase engine performance. A tune might be required to gain the most from this modification, as well as to get your car's ECU accustomed to seeing lower temperatures.

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Coolant Hose

For vehicles with production date from 09/2003

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T#:379683

Part#: 17127568246

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This is the return hose that attaches from the water pump to the radiator

Expansion Tank Vent Hose

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T#:592006

Part#: 17127541146

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Replace your leaking hose

Rein Coolant Vent Pipe - E65, E66

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T#:591999

Part#: 17127534527

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Connects the radiator to the expansion tank

Rein Radiator Hose - Upper - E65, E66

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T#:379749

Part#: 17127535742

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A common source of cooling system failure

OEM Rein Coolant Expansion Tank Hose - Lower - BMW E65/66 7 Series ...

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T#:375750

Part#: 17127508015

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Attaches from the bottom fitting on the expansion tank to the supply hose. 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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Bremmen Auxiliary Fan Temperature Switch - E46 E39 E9X E60 E70 E53 ...

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T#:640141

Part#: 13621433077

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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

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

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T#:340541

Part#: 17111742231

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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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Rein Cooling O-Ring - E53, E60, E63, E64, E65, E66, E70

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T#:362446

Part#: 11531710048

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Seals the rear of the water transfer pipe to the block

Rein Coolant Expansion Tank - E65, E66

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T#:593077

Part#: 17137647713

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Replace your cracked or faded tank

Expansion Tank Vent Hose

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T#:379672

Part#: 17127508013

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A commonly leaking hose

OEM Rein Coolant Hose - BMW E60 E63/E64 E65/E66

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T#:45791754

Part#: 17127508011R

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This hose runs from the lower radiator port on the passenger side of the radiator to the water pump on the engine. Rubber hoses can crack over time, leading to coolant loss. Replace your hose with this OEM Rein hose to eliminate leaks and prevent overheating.

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OEM Rein Coolant Hose w/ Temperature Sensor - BMW E60 E63/E64 E65/E66...

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T#:375746

Part#: 17127508011

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This hose runs from the lower radiator port on the passenger side of the radiator to the water pump on the engine. Rubber hoses can crack over time, leading to coolant loss. Replace your hose with this OEM Rein hose to eliminate leaks and prevent overheating.

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Cool Retrun Hose

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T#:379713

Part#: 17127540666

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Connects to the radiator

Bremmen Parts Radiator Cooling Fan Assembly - E60, E61, E63, E64, E65...

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T#:1195937

Part#: 17427543282

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Cooling fan with housing

Cooling Fan Shroud - E60, E61, E65

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T#:22525965

Part#: 17427514560

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$ 199.85 USD

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Direct replacement for cracked or broken cooling fan shroud. Found on 525i, 525xi, 530i, 530xi, 745i.

Thermostat - 105C

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T#:15511827

Part#: 11537502779

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$ 45.58 USD

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If your vehicle is experiencing cooling issues, chances are the thermostat is the cause. Common symptoms include prolonged warm-up at highway speeds from the thermostat being stuck open, or consistent overheating issues from the thermostat being stuck in the closed position. Either condition can result in poor performance, and potential damage to vital components in your vehicle.

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Rein Coolant Return Pipe - N62 N73

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T#:386411

Part#: 11511439976

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$ 13.29 USD

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This is the coolant return pipe on the back of the water pump on the N62 and N73 engines used in the E53 X5, E60 545/550, E63 645/650, E65 745/750, E70 X5, and F02 750. This pipe connects the water pump to the valley pan and it's a compression fitting (no o-rings). Whenever the water pump or valley pan are replaced this tube should also be replaced. This is one area where you don't want to go back and re-do your work because of a leaking fitting! In German, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the worldaEURtms finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.

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OEM Rein Coolant Supply Hose - E65 E66

For vehicles with production date up to 09/2003

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T#:375745

Part#: 17127508010

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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.

Radiator Support Bracket

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T#:14122755

Part#: 17117514402

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Mounts to top of radiator bracket, 2 per vehicle.

Coolant Hose

For vehicles with production date up to 09/2003

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T#:379702

Part#: 17127508014

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$ 24.69 USD

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This is the return hose that attaches from the water pump to the radiator

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