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BMW Cooling System Parts & Accessories for BMW 3 Series E91 (2006-2012)

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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

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T#:15511826

Part#: 11537549476

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Overheating your N52 or N54 engine can be detrimental to the longevity of your engine. We also recommend replacing your hardware 07119903851 x2

Expansion Tank Vent Hose

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T#:30729012

Part#: 17127618510

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Bav Auto Spill-Proof Coolant / Antifreeze Funnel

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T#:580395

Part#: B8800082

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Multiple adapters include to fit a variety of vehicles.

Bav Auto Fan Clutch Wrench - 32mm

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T#:580348

Part#: B8800019

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Used to remove your fan clutch

Radiator / Cooling System Pressure Tester- Bavarian Autosport ...

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T#:580397

Part#: B8800084

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Coolant Hose - Priced Each

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T#:30729023

Part#: 17127540020

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Radiator Hose

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T#:5649971

Part#: 64216951946

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Connects from the top side of the radiator to the expansion tank. Often an overlooked maintenance part.

Radiator Hose - Upper

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T#:38621422

Part#: 17127531579

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Radiator Hose - Lower

Lower

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T#:30729025

Part#: 17127531581

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Lower Cooling Hose - 17117524710

For vehicles with automatic transmission only

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T#:36913374

Part#: 17117524710

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This hose connects to the lower coolant pipe on the passenger side of vehicles equipped with automatic transmissions.

Coolant Hose Assembly

For manual transmission models only

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T#:30729020

Part#: 17127548223

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Bav Auto Angled Hose Pinch Plier Set - 2pc

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T#:580379

Part#: B8800058

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Angled jaws close, creating a complete seal every time you use them - the jaws are offset, making it possible to use in hard-to-reach locations. Made of glass-filled nylon for extra strength. These are perfect for use with brake lines, etc.

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Coolant Inlet Pipe

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T#:36032354

Part#: 11537516414

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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

Bremmen Parts O-Ring

Found at the flange end of the upper thermostat hose

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T#:399143

Part#: 11537545278

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Seals your cooling system

Coolant Expansion Tank Cap

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T#:36032339

Part#: 17117639020

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Water Pipe

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T#:39295542

Part#: 11537545890

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Bremmen Parts Coolant Hose - E9X N52

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T#:38621425

Part#: 11537521049

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Over the years and with exposure to extremely hot coolant, the coolant hoses in your vehicle can take a beating. Being made of reinforced rubber, these hoses can fail in a number of ways. Splitting at a hose clamp, swelling, cracking, and breaking are just a few of the ways this hose can leave you stranded. Replace it at the first sign of wear to keep your coolant in your engine.

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Water Pump Bolt

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T#:15478736

Part#: 11 510392553

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Secures the water pump in place.

Radiator Hose - Lower

For N52 engines only

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T#:53008808

Part#: 17127564478

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Coolant Expansion Tank - With Cap

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T#:55497428

Part#: 17137640514

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