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Bremmen Parts BMW Cooling System Parts & Accessories

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

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T#:591532

Part#: 11538674895KT1KT

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Coolant Expansion Tank W/O Cap

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T#:639188

Part#: 17137529273

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cable adapter, electro set

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T#:583893

Part#: 12517646145

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Coolant Hose - Upper

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T#:30729014

Part#: 17127604542

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Low Temperature Thermostat - 97C

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T#:33612900

Part#: 11537601159-97C

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Thermostat Adapter

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T#:36913387

Part#: 12518614952

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Coolant Hose

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T#:30729015

Part#: 17127599450

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Water Pipe - M54 E46 E58 E83

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T#:36981061

Part#: 11537502000

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Water pipes play a crucial role in maintaining proper engine cooling. If cracked, they must be replaced immediately to prevent engine overheating. This water pipe runs from the rear of the water pump housing to the expansion tank hose. It comes complete with all necessary seals for a hassle-free installation.

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Coolant Hose

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T#:30729017

Part#: 17127576371

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Bremmen Parts Coolant Hose - F10

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T#:1195929

Part#: 11537593513

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Coolant hose from the water pump

Bremmen Parts Heater Hose - Supply - E83

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T#:1195974

Part#: 64213400415

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Feeds coolant from the engine to the heater valve.

Bav Auto Coolant Expansion Tank - E53 X5, Z3 2.3 2.5i 2.8 3.0i ...

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T#:640497

Part#: 17107514964

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This radiator expansion tank is used on E53 X5 4.4i and 4.6is with M62 engine, and Z3 2.3 2.5i 2.8 3.0i from 1999-2002. It is a common failure item as the plastic weakens over time and stress cracks will lead to coolant leaks. 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. 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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Bremmen Parts Water Pipe Connector - E83, Z4

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T#:1195932

Part#: 17112248409

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Located underneath the expansion tank

Coolant Hose - Upper

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T#:30729016

Part#: 17127596837

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Automatic Transmission Thermostat

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T#:15511829

Part#: 17 111437362

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Heat exchanger for your automatic transmission, usually changed when you replace your expansion tank.

Radiator Hose - Lower

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T#:53008808

Part#: 17127564478

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MINI N14 N18 Radiator Fan

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T#:28138160

Part#: 17422752632

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MINI N14 N18 Radiator Fan

For Mini owners seeking efficient cooling system performance, the MINI N14 N18 Radiator Fan is an essential component. This radiator fan helps maintain optimal engine temperature, preventing overheating and potential damage. With its durable construction and precise engineering, it ensures reliable operation, providing peace of mind to Mini enthusiasts.

Helps maintain optimal engine temperature
Prevents overheating and potential damage
Durable construction for long-lasting use
Ensures reliable operation

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Bremmen Parts Water Pump - E46 M3 S54

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T#:36981065

Part#: 11517838159

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A failing water pump is a recipe for engine overheating and costly internal damage. Keep your coolant flowing and your engine protected by replacing your aging pump with this high-quality OE unit from Bremmen Parts.

Water pump replacement is suggested at 60,000 - 80,000 miles.

This pump includes the alignment dowel, sealing gasket, and thermostat sealing o-ring. We recommend picking up a water pipe sealing o-ring (11537830712) and thermostat (11531318274) for a comprehensive service.

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Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

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T#:640140

Part#: 17111712788

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Plastic bleeder screw for cooling system is used to bleed air that would otherwise create an air pocket and lead to overheating. Includes o-ring seal.

Radiator Fan

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T#:26904930

Part#: 17422754854

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Coolant Expansion Tank Cap

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T#:36032339

Part#: 17117639020

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Coolant Level Sensor

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T#:30728984

Part#: 61311378320

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Cooling Hose

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T#:38688896

Part#: 13541703865

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Radiator Hose - Upper

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T#:38688897

Part#: 11531708499

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N54 Coolant Hose/Elbow - 11537545665

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T#:36100140

Part#: 11537545665

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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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Heat Management Module

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T#:20782215

Part#: 11538631943

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Engine Coolant Hose - Turbo Charger

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T#:36981049

Part#: 17127617377

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Bremmen Parts O-Ring

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T#:399143

Part#: 11537545278

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Seals your cooling system

Heater Hose

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T#:38621424

Part#: 64218363198

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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

Coolant Thermostat Assembly

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T#:50311454

Part#: 11538642560

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Coolant Hose - Lower Rear

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T#:50521421

Part#: 17127535898

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Radiator Hose - Lower

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T#:39768309

Part#: 11531741409

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Thermostat Housing

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T#:15511819

Part#: 11537512733

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Typically referred to as the thermostat neck / housing, this part mounts on the highest point on the head and controls the flow back to the pressure tank. Cracking, which usually occurs around the gasket seal and leaks, are symptoms that it’s worn out. This item does not include the thermostat.

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MINI W10 W11 Bolt And Washer - Priced As Set

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T#:28138103

Part#: 07131486714KT

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MINI W10 W11 Bolt And Washer

Enhance your MINI's engine performance with the MINI W10 W11 Bolt And Washer, designed to secure the thermostat housing to the side of the engine.

Benefits:

Ensures secure attachment of the thermostat housing
Prevents leaks and ensures proper functioning of the thermostat
High-quality construction for durability and reliability
Easy replacement process

Upgrade your MINI's engine with the MINI W10 W11 Bolt And Washer for reliable performance.

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Coolant Inlet Pipe

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T#:36032354

Part#: 11537516414

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MINI W10 W11 Radiator Fan Housing

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T#:637239

Part#: 17117541092

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MINI W10 W11 Radiator Fan Housing is an essential replacement part designed to address issues with a failed radiator fan. This high-quality housing ensures optimal performance of the cooling system, maintaining the engine's temperature within the ideal range.

Direct Replacement: Designed to fit perfectly as a replacement for a failed radiator fan housing.
Optimal Performance: Ensures efficient cooling system operation to prevent engine overheating.
Durable Construction: Built to withstand high temperatures and harsh engine environments.
Easy Installation: Provides a straightforward installation process, restoring your vehicle's cooling system functionality.

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Bremmen Water Pump Bolt - M8x34 - BMW N20 2.0L

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T#:36913363

Part#: 11517602125

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This external torx head screw is a direct replacement for the costly OEM screw, which must be replaced during every water pump service.

Quantity 3 required for complete replacement.

Thermostat W/ Gasket

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T#:36066205

Part#: 11531485847

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Water/Coolant Pump With Support

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T#:49648357

Part#: 11518650988

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Electronic Thermostat And Coolant Distribution Module

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T#:50311455

Part#: 11538843406

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Coolant Hose - Upper Rear

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T#:36811814

Part#: 17127532972

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E39 Upper Radiator Hose - 11531705223

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T#:36100154

Part#: 11531705223

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Over time, prolonged exposure to high-temperature coolant can take a toll on your vehicle's hoses. Made from reinforced rubber, these hoses are prone to wear and failure in various ways, including splitting at hose clamps, swelling, cracking, or breaking. Any of these issues can lead to coolant loss and potentially leave you stranded. Replacing your hoses at the first sign of wear is essential to maintaining a properly functioning cooling system.

This replacement hose is designed with the correct diameter, bends, and length for a precise fit, making it an ideal solution for swelled or damaged hoses. With straightforward installation, this hose provides peace of mind, whether you're embarking on a long road trip or simply commuting to work.

When replacing your radiator hose, some coolant loss is unavoidable. Browse our website to find the exact replacement coolant and other parts for your vehicle, delivered straight to your door. Don’t forget to order a new thermostat housing as well—factory plastic units often crack or warp during removal, and replacing them ensures a complete and reliable repair.

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Flange Screw - Priced Each

10X Entries Into Our F80 M3 Sweepstakes

T#:588766

Part#: 11537565526

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$ 3.99 USD

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Enhance your Mini's thermostat functionality with the Flange Screw, an essential component for proper installation. Designed specifically for use in the thermostat location, this screw ensures secure and reliable operation. Benefits include:

Ensures proper installation of the thermostat.
Provides secure attachment.
Compatible with Mini models.
Enhances engine performance and temperature regulation.

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E39 Lower Radiator Hose - 11531705224

10X Entries Into Our F80 M3 Sweepstakes

T#:36100127

Part#: 11531705224

In Stock

Sale - Save 15% $ 37.99

This product was last offered at the strikethrough price on
09-16-2026

$ 32.29 USD

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This product was last offered at the strikethrough price on
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Over time, and with prolonged exposure to high-temperature coolant, the hoses in your vehicle's cooling system endure significant wear and tear. Made from reinforced rubber, these hoses can fail in various ways, including splitting near hose clamps, swelling, cracking, or even rupturing completely. Any of these failures can lead to coolant loss and leave you stranded. Replace your coolant hoses at the first sign of wear to ensure your engine stays properly cooled and running reliably.

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Bremmen Parts Coolant hose - E83

10X Entries Into Our F80 M3 Sweepstakes

T#:1195976

Part#: 64213400417

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Sale - Save 3% $ 43.85

This product was last offered at the strikethrough price on
05-03-2026

$ 42.53 USD

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This product was last offered at the strikethrough price on
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Connects the expansion tank to the heater core

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

10X Entries Into Our F80 M3 Sweepstakes

T#:1195937

Part#: 17427543282

Ships in 1 day

Sale - Save 5% $ 722.15

This product was last offered at the strikethrough price on
05-03-2026

$ 686.04 USD

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$ 686.04 USD

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Cooling fan with housing

Bremmen Lower Radiator Coolant Hose - E70 E71 F15 F16 N63

10X Entries Into Our F80 M3 Sweepstakes

T#:50381401

Part#: 17127576358

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Sale - Save 3% $ 85.67

This product was last offered at the strikethrough price on
05-03-2026

$ 83.10 USD

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Connects the lower radiator to the water pump Replace leaking hoses to prevent coolant loss and overheating

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

10X Entries Into Our F80 M3 Sweepstakes

T#:1195934

Part#: 17127548203

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Sale - Save 15% $ 57.11

This product was last offered at the strikethrough price on
05-03-2026

$ 48.54 USD

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Low temperature cooling module hose.

Cooling Fan Shroud - E60, E61, E65

10X Entries Into Our F80 M3 Sweepstakes

T#:22525965

Part#: 17427514560

Ships in 1 day

Sale - Save 3% $ 206.03

This product was last offered at the strikethrough price on
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.

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