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BMW Cooling System Parts & Accessories for BMW 3 Series E92 (2007-2013)

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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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Water Pump And Thermostat Kit - BMW N52 3.0L

T#:17073598

Part#: 11537549476KT

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$ 318.83 USD

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$ 424.99

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Includes everything you may need to replace your water pump and thermostat.

BMW N54 N55 S55 Mosselman Thermostat Installation Kit

T#:4799665

Part#: THERMINSTALLKT

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$ 21.64 USD

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BMW N54 N55 S55 Mosselman Thermostat Installation Kit is designed to ensure a seamless installation of the Mosselman thermostat on BMW engines. This comprehensive kit from Turner Motorsport includes all necessary gaskets and components, guaranteeing a reliable and precise installation for optimal engine performance.

Complete Kit: Includes all essential gaskets and components required for a hassle-free thermostat installation.
Optimal Performance: Ensures proper installation of the Mosselman thermostat, leading to improved engine cooling efficiency and performance.
High-Quality Components: Gaskets and parts are manufactured to meet high standards of durability and reliability.
Precision Fit: Engineered to match OEM specifications, providing a perfect fit and reliable performance.
Ease of Installation: All necessary parts are included, simplifying the installation process and reducing the need for additional purchases.

Upgrade your BMW's cooling system with the Mosselman Thermostat Installation Kit from Turner Motorsport, ensuring a top-quality, reliable setup for your engine.

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Cooling System Hose Kit

T#:24212306

Part#: E9XN52CHKT

Ships on Sep 28, 2026

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$ 174.22 USD

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$ 174.22 USD

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Replace your cooling system hoses with this complete kit including coolant

Performance Water Pump And Thermostat Kit

T#:15710799

Part#: 11517632426-KT

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$ 410.34 USD

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$ 514.99

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$ 410.34 USD

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The stock thermostat is designed to open at 97C. This leaves your engine running fairly hot, and running for quite awhile before your thermostat will begin operation. With the Mishimoto Racing thermostat, the activation temperature becomes 74C. That's 23C cooler, meaning you can rest easy knowing your engine will stay cooler to help avoid all the problems that can be associated with an engine running hot. The water pumps in these BMW models are known for failure near 80,000 miles is a very common issue often times leaving the owner stranded. This kit provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road. Mishimoto Racing thermostat Bavarian Autosport water pump Genuine BMW coolant Mounting hardware required for both the thermostat and water pump

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Thermostat Installation Kit with Thermostat - N54, N55, S55

T#:55353595

Part#: OTN54.T85KT3

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$ 390.23 USD

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High oil temperatures are the ultimate enemy of your engine's longevity and performance. If you want to keep pushing your BMW to the limit you need to manage the heat.

Cooling System Refresh Kit - Level 2 - E9x, E82, E88, Z4

T#:42099868

Part#: 11537558523TKT

Back Ordered

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$ 671.10 USD

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$ 829.99

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$ 671.10 USD

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Keep your BMW running at the proper temperature and avoid costly engine repairs with the Cooling System Refresh Kit, the complete maintenance solution trusted by enthusiasts and professionals alike.

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Thermostat

T#:15511826

Part#: 11537549476

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$ 69.99 USD

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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

T#:30729012

Part#: 17127618510

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$ 29.99 USD

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$ 29.99 USD

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Upper Radiator Hose

T#:30729022

Part#: 17127540127

Ships on Aug 20, 2026

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$ 34.26 USD

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$ 42.99

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$ 34.26 USD

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Lower Radiator Hose

T#:30729018

Part#: 17127564480

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$ 34.26 USD

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$ 34.26 USD

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Heater Return Line

T#:27572099

Part#: 17127548230

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$ 86.69 USD

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$ 101.99

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$ 86.69 USD

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Coolant Hose - Priced Each

T#:30729023

Part#: 17127540020

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$ 29.37 USD

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N54 Coolant Outlet Hose - 11537541992

T#:36981059

Part#: 11537541992

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$ 26.92 USD

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This coolant outlet hose connects the cylinder head to the thermostat housing and is a critical component of the cooling system. For many N54 owners, the "Mickey Mouse" flange is a common failure point. This plastic connector is vulnerable to degradation from heat, exposure to chemicals, and wear over time.

If your outlet hose has failed or the cylinder head flange is leaking, it’s best to replace the entire assembly for a reliable and long-lasting repair.

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Coolant return line

T#:30729019

Part#: 17127548229

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$ 79.14 USD

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$ 98.99

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Thermostat

T#:26538316

Part#: 11537601158

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$ 76.70 USD

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$ 95.99

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Radiator Hose

T#:5649971

Part#: 64216951946

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$ 27.12 USD

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

Radiator Hose - Upper

T#:38621422

Part#: 17127531579

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$ 34.99 USD

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Radiator Hose - Lower

Lower

T#:30729025

Part#: 17127531581

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$ 24.27 USD

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Lower Cooling Hose - 17117524710

For vehicles with automatic transmission only

T#:36913374

Part#: 17117524710

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$ 29.37 USD

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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

T#:30729020

Part#: 17127548223

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$ 102.81 USD

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Low Temperature Thermostat - 97C

T#:33612901

Part#: 11537601158-97C

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$ 76.70 USD

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Coolant Hose

T#:30729015

Part#: 17127599450

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$ 40.79 USD

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Coolant Expansion Tank Cap

T#:36032339

Part#: 17117639020

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$ 11.99 USD

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N54 Coolant Hose/Elbow - 11537545665

T#:36100140

Part#: 11537545665

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$ 13.05 USD

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This Coolant Hose is located behind the thermostat on N54-equipped BMW models. Due to weak rubber construction and its close proximity to the bank one turbocharger, this hose is a common failure item on high-mileage vehicles.

Whether you are replacing a failed hose or preemptively servicing your cooling system, choose this high-quality replacement from Bremmen Parts for a lasting repair.

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Coolant Inlet Pipe

T#:36032354

Part#: 11537516414

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$ 14.68 USD

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

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

Bremmen Parts O-Ring

Found at the flange end of the upper thermostat hose

T#:399143

Part#: 11537545278

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$ 4.07 USD

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Seals your cooling system

Bremmen Parts Coolant Hose - E82, E88, E90, E92, E93, Z4

T#:1195934

Part#: 17127548203

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$ 48.54 USD

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Low temperature cooling module hose.

Water Pipe

T#:39295542

Part#: 11537545890

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$ 17.33 USD

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$ 20.99

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Bremmen Parts Coolant Hose - E9X N52

T#:38621425

Part#: 11537521049

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$ 14.68 USD

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$ 18.99

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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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