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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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Hose Clamp 2 5/16" - 3 1/4" - priced each

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T#:376806

Part#: 54155K23

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$ 4.99 USD

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Hose Clamp 2 5/16" - 3 1/4"

Ensure secure hose connections with the Hose Clamp 2 5/16" - 3 1/4", a versatile and reliable solution for various applications. Crafted from durable materials, this clamp offers superior strength and corrosion resistance. Its adjustable design allows for a snug fit, reducing the risk of leaks and ensuring optimal performance. Upgrade your hose connections with the precision and reliability of the Hose Clamp 2 5/16" - 3 1/4".

Versatile and reliable solution for various applications
Superior strength and corrosion resistance
Adjustable design for a snug fit
Reduces risk of leaks for optimal performance

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Cooling Fan Shroud - E60, E61, E65

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T#:22525965

Part#: 17427514560

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Sale - Save 3% $ 206.03

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05-03-2026

$ 199.85 USD

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

Hose F Additional Water Pump/Water Valve - E65, E66

T#:16282

Part#: 64218377698

Ships in 6 Business Days

6% off MSRP $ 61.99

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

$ 57.99 USD

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6% off MSRP

$ 61.99

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

$ 57.99 USD

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Genuine BMW Hose F Additional Water Pump/Water Valve -
This item fits the following BMW Chassis:
E65

Radiator Duct - Upper - E65, E66

T#:117093

Part#: 51717011217

Ships in 5 Business Days

3% off MSRP $ 57.99

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$ 55.99 USD

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3% off MSRP

$ 57.99

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$ 55.99 USD

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Genuine BMW Air Duct, Radiator, Upper -
This item fits the following BMW Chassis:
E65

O-RING

T#:580584

Part#: C32348

Ships in 7 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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Genuine BMW Radiator Support "Front Panel" - E65 E66

T#:117155

Part#: 51717022966

Ships in 9 Business Days

2% off MSRP $ 428.99

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$ 419.99 USD

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2% off MSRP

$ 428.99

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$ 419.99 USD

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Genuine BMW Front Panel, Center -
This item fits the following BMW Chassis:
E65

Coolant Expansion Tank - E65 745i/li, 750i/li, 760i/li

T#:186486

Part#: 17137647713

Ships on Sep 21, 2026

$ 81.99 USD

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This high quality BEHR brand expansion tank is used on E65/E66 7 series with the N62 and N73 engines, and is a common failure item. BEHR was the original equipment supplier to BMW, so you know the BEHR made expansion tank will be the highest quality available. Be cautious of competitors selling this part for less -- is it a BEHR? Probably not. We only carry the BEHR brand expansion tank as it is the only one we use in our own BMWs.

If you are overhauling your coolant system, now is the time to consider preventative replacing this expansion tank. These are known to go bad, causing a leak which can leave you stranded. We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on. Replaces part numbers 17137543003 and 17138600275.

This item fits the following BMWs:
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li

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E60 545i, E65 B7 Alpina OEM Behr Radiator

T#:19444

Part#: 17117532770

Ships on Sep 21, 2026

$ 258.99 USD

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$ 258.99 USD

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This radiator is the OE BMW replacement for the stock radiator in the E60 545i and E65 B7 Alpina. Keeping your BMW at peak performance means including your cooling system in your regular maintenance schedules with the radiator, water pump, and thermostat being the primary components needing replacement. Not only can a failed radiator leave you stranded, but the sophisticated engine electronics will limit engine operability if temperatures reach a certain level. So having an efficient and fully functional cooling system is critical not only for safety but for performance as well. Don't wait until it's too late!

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:
2004-2005 E60 BMW 545i - Manual Transmission
2007-2008 E65 BMW B7 Alpina

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Anti-Freeze Tester

T#:641679

Part#: CTAA195

In Stock

$ 9.98 USD

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$ 9.98 USD

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Tests all ethylene glycol solutions with radiator hot or cold

Auxiliary Electric Water Pump

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T#:57014181

Part#: 64116913489

Ships on Sep 21, 2026

$ 75.99 USD

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$ 75.99 USD

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Keep your heating and cooling systems performing sharply with a precision-fit replacement built for long-haul reliability.

Thermostat - 105C

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T#:15511827

Part#: 11537502779

Ships on Sep 28, 2026

Sale - Save 3% $ 46.99

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05-03-2026

$ 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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Engine Water Pump Gasket Kit

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T#:54317216

Part#: 359.200

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$ 12.99 USD

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$ 12.99 USD

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This Elring water pump gasket set is the perfect solution for refreshing your BMW's cooling circuit during a water pump service or cooling system overhaul.

2 Pin Connector

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T#:33412932

Part#: 61132359999

In Stock

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06-14-2026

$ 8.24 USD

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Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Thermostat With Housing & Gasket

T#:56544033

Part#: 11537586885

Special Order: No Guaranteed ETA

$ 68.99 USD

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This Febi Bilstein electronic coolant thermostat assembly delivers factory-level thermal control to keep coolant temperatures stable across varying engine loads.

Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02

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T#:639833

Part#: 13621433076

In Stock

Sale - Save 20% $ 14.99

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05-03-2026

$ 11.99 USD

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This is the coolant temperature sensor used in many BMW models from the late-1990s to the mid-2010s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer. This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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BMW Oil Cooler

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T#:38385316

Part#: 17217507974

Special Order: No Guaranteed ETA

$ 66.99 USD

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$ 66.99 USD

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The BMW oil cooler maintains optimal engine oil temperature, preventing overheating and ensuring proper lubrication for improved performance and longevity.

Water Pump With Gasket

T#:56218609

Part#: 11517586779

Special Order: No Guaranteed ETA

$ 113.99 USD

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$ 113.99 USD

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Protect your BMW V8 against thermal stress and overheating with this heavy-duty water pump from Febi Bilstein.

Meyle Engine Coolant Thermostat - BMW FXX, GXX

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T#:52797701

Part#: 3282280016

Ships on Sep 21, 2026

$ 47.99 USD

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$ 47.99 USD

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This MEYLE thermostat ensures your engine stays at the perfect temperature for efficiency and power.

Auxillary Fan Switch

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T#:4934936

Part#: 3148210000

Ships on Sep 21, 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

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T#:5973204

Part#: 17117546548

Ships on Sep 21, 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 Hose

For vehicles with production date up to 09/2003

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T#:379702

Part#: 17127508014

Back Ordered

Sale - Save 5% $ 25.99

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

$ 24.69 USD

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$ 25.99

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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

Rein Coolant Return Pipe - N62 N73

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T#:386411

Part#: 11511439976

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08-13-2026

$ 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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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

Auxiliary Fan Switch

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T#:376847

Part#: 13621433077

Ships in 2 Business Days

$ 10.99 USD

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$ 10.99 USD

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Comes with related o-ring

Radiator Mount

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T#:56977984

Part#: 17117514402

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$ 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.

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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Sale - Save 5% $ 134.99

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08-31-2026

$ 128.24 USD

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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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08-13-2026

$ 7.83 USD

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Mounts to top of radiator bracket, 2 per vehicle.

BMW Heater Control Valve

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T#:16907152

Part#: 64110301939

Special Order: No Guaranteed ETA

$ 199.99 USD

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This valve controls the flow of the coolant into the heater core, which allows warm air to be pushed through the HVAC system.

Spirolox Clip

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T#:55821687

Part#: 111414399753

Ships in 2 Business Days

$ 9.99 USD

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The ÜRO Parts Spirolox Clip provides the heavy-duty reliability your European vehicle demands, eliminating the structural weak links caused by fatigued or distorted factory hardware.

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