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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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Performance Thermostat - 90C - N62, N63, S63, N73, S55
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T#:637061
Part#: 11537586885
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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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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
Aluminum Thermostat Housing - E34, E36, Z3
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T#:579865
Part#: 54402
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The plastic thermostat cover in your BMW is a known point of failure. Throughout the years of repeated contact with hot coolant, the plastic can crack and cause massive coolant leaks and potential overheating.
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Thermostat With Housing - 90C
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T#:598978
Part#: 11531436386
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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 help 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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Expansion Tank To Upper Radiator Hose
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T#:33879981
Part#: 17127803838
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Bremmen Thermostat Replacement Kit - Aluminum Metal
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T#:25606667
Part#: 11537534521M
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Thermostat With Aluminum Housing - N20
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T#:30828065
Part#: 11538635689M
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Thermostat Replacement Kit - Aluminum Metal
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T#:26504937
Part#: 11538674895M
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Bavarian Autosport Radiator Hose - Upper - E46 M52 M54
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T#:640204
Part#: 17127510952
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Replacement Upper Radiator Hose for E46 3 series (Non-M3). We recommend replacing the Coolant Temperature Sensor while replacing this hose as the original sensor is often damaged while trying to remove it from the old hose. 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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Expansion Tank Vent Hose
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T#:30729012
Part#: 17127618510
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Lower Radiator Hose
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T#:30729018
Part#: 17127564480
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Upper Radiator Hose
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T#:30729022
Part#: 17127540127
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Electronic Thermostat And Coolant Distribution Module
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T#:26538308
Part#: 11537642854
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Thermostat - B48
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For vehicles with the Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines
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T#:23648673
Part#: 11537644811
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Coolant Hose - Return Line
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T#:30729013
Part#: 17128570061
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Bav Auto Radiator Hose - Lower - E46 M52 M54
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T#:640203
Part#: 11531436408
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OEM Replacement Lower Radiator Hose for E46 3 series (Non-M3). We recommend replacing the Coolant Temperature Sensor while replacing this hose as the original sensor is often damaged while trying to remove it from the old hose. 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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Thermostat With Housing
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T#:26494584
Part#: 11537509227
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Heater Return Line
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T#:27572099
Part#: 17127548230
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Connector - Upgraded Aluminum Metal
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T#:27205374
Part#: 11118511205
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Coolant Hose - Priced Each
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T#:30729023
Part#: 17127540020
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Bremmen Parts Upper radiator hose - F06, F07, F10, F12, F13
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T#:1195936
Part#: 17127580957
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From radiator to filter housing

Coolant Expansion Tank
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T#:36032353
Part#: 17111741167
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B58 Coolant Hose - Auxiliary Water Pump to Turbocharger
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T#:36981057
Part#: 11538611277
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This Bremmen Parts Coolant Hose is designed to connect the turbocharger to the auxiliary water pump, providing a premium replacement for B58-equipped BMW models. Constructed with high-quality, heat-resistant materials, this hose ensures reliable and efficient engine cooling, even under extreme temperatures. Engineered to meet OEM specifications, it offers a precise fit and a secure connection, optimizing coolant flow to maintain the performance and longevity of your BMW’s turbocharged engine.

Key Benefits:

Premium Materials: Crafted from heat-resistant materials to endure high-temperature conditions. OEM-Compatible Fit: Matches BMW’s original specifications for an easy, hassle-free installation. Enhanced Cooling: Designed to support efficient coolant flow in turbocharged engines. Durable Construction: Built to last, minimizing the need for frequent replacements and ensuring long-term reliability.

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Coolant Expansion Tank - 17111436381
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T#:36303285
Part#: 17111436381
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BMW E39 Coolant Expansion Tank is an essential component designed to maintain the proper coolant level in your vehicle's cooling system. Manufactured with high-quality materials, this expansion tank ensures reliable performance and durability, preventing engine overheating by accommodating the expansion of coolant as it heats up. The kit includes a level sensor and cap, providing everything needed for a seamless installation. This expansion tank is specifically engineered to meet the exact specifications of your BMW E39, offering a perfect fit and optimal functionality.

Complete Kit: Includes level sensor and cap for easy installation. High-Quality Construction: Built with durable materials for long-lasting performance. Prevents Overheating: Helps manage coolant expansion, ensuring engine protection. Exact Fit: Designed to meet the precise specifications of your BMW E39. Enhanced Reliability: Ensures proper coolant level maintenance for optimal cooling system function.

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MINI R5X R6X Thermostat Housing W/ Thermostat Kit - Priced As Kit ...
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T#:588457
Part#: 115375345211KT
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MINI R5X R6X Thermostat Housing W/ Thermostat Kit

Upgrade your MINI's cooling system with the MINI R5X R6X Thermostat Housing W/ Thermostat Kit. Commonly known as the thermostat neck or housing, this crucial part is responsible for regulating coolant flow to the pressure tank from the highest point on the head. Symptoms of a worn-out thermostat housing include cracking around the gasket seal, leading to leaks.

This comprehensive kit includes:

  • Profile gasket
  • Temp sensor
  • Two O-rings
  • Clip and bleeder screw

Additionally, this kit comes with a generous 3-year warranty, providing peace of mind for your MINI's cooling system.

Ensure optimal cooling system performance and prevent leaks with the MINI R5X R6X Thermostat Housing W/ Thermostat Kit.

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Engine Coolant Expansion Tank
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T#:30729009
Part#: 17138677649
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Water Heater Control Valve
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T#:3018052
Part#: 64116910544
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Keep your HVAC system running properly with a new Water Heater Control Valve.

Radiator Hose - Lower
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T#:38655188
Part#: 11537830715
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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.
Return Hose
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T#:36811811
Part#: 11537600674
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Hose F Engine Inlet-Changeover Valve
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T#:30729011
Part#: 17128616914
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Thermostat
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T#:26538316
Part#: 11537601158
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Expansion Tank Hose
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T#:27572101
Part#: 64218376153
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Radiator Hose - Upper
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T#:38621426
Part#: 11537830716
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Coolant Outlet Connector - B58A (F3X, G30, G01/G02)
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T#:36913371
Part#: 11118619408
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The Coolant Outlet Connector connects the engine block coolant outlet to the upper radiator hose.

Due to fragile plastic construction and consistent exposure to hot, chemical-rich engine coolant, this piece is prone to degradation and (potentially) complete failure.

Whether you're fixing a failed connector or preemptively replacing this failure-prone component, choose this quality replacement from Bremmen Parts for a lasting repair.

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Coolant return line
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T#:30729019
Part#: 17127548229
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Radiator Hose - Upper
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T#:38621422
Part#: 17127531579
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Coolant Expansion Tank
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T#:30728965
Part#: 17137823626
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Auxiliary Cooling Fan Assembly - 17117561757
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T#:36913373
Part#: 17117561757
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05-03-2026

$ 165.59 USD

The auxiliary fan in your vehicle serves an extremely important role. When your car reaches temperatures that may be hazardous to your engine, the auxiliary fan moves air through the radiator to provide better cooling. Usually activated during times of stationary vehicle operation, it supplements the air usually driven through the radiator by driving down the road.

If your vehicle is getting too hot during traffic or at stop lights, your auxiliary fans are probably faulty. Replace yours with this piece from Bremmen Parts to restore the factory cooling in your vehicle and prevent catastrophic damage to your engine. Even if your fans are still operational but the blades are damaged or cracked, replacement is the only solution.

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Junction Heat Hose - 11538606278
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Bremmen Parts - Corporate Logo
T#:36913362
Part#: 11538606278
In Stock
Sale - Save 21% $ 54.99

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

$ 43.24 USD
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Sale - Save 21%
$ 54.99

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

$ 43.24 USD
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This junction heat hose, made from rubber, is prone to cracking, dry rot, and brittleness over time, often leading to coolant leaks at the front of the engine. Such leaks pose a significant risk to your engine’s health, as rapid coolant loss can cause overheating and severe damage.

Replace your worn or leaking heat hose with this high-quality OE replacement from Bremmen Parts. Engineered for a precise fit and long-lasting performance, this hose ensures a reliable repair and helps protect your engine from potential overheating.

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Cylinder Head Expansion Tank Hose - Priced Each
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Bremmen Parts - Corporate Logo
T#:30729010
Part#: 17129845173
In Stock
Sale - Save 21% $ 30.99

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

$ 24.47 USD
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$ 30.99

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

$ 24.47 USD
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Upper Radiator Hose - M54
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Bremmen Parts - Corporate Logo
T#:36066204
Part#: 11533400207
In Stock
Sale - Save 20% $ 39.99

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

$ 31.82 USD
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$ 39.99

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

$ 31.82 USD
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This Upper Radiator Hose connects the thermostat housing to the radiator, playing a critical role in the cooling system. Due to constant exposure to high temperatures and chemical-rich engine coolant, it is prone to failure over time. If the hose fails, coolant will escape rapidly, potentially leading to engine overheating.

This high-quality replacement hose from Bremmen Parts features a precision-molded rubber section and two "Quick-Connect" connectors, ensuring a secure and reliable fit for a seamless installation.

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Coolant Hose Assembly
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Bremmen Parts - Corporate Logo
T#:30729020
Part#: 17127548223
In Stock
Sale - Save 20% $ 128.99

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

$ 102.81 USD
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$ 128.99

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

$ 102.81 USD
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Hose - Radiator-Engine
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Bremmen Parts - Corporate Logo
T#:30729024
Part#: 17127535529
In Stock
Sale - Save 20% $ 95.99

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

$ 76.70 USD
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$ 95.99

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

$ 76.70 USD
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Upper Radiator Hose - E38 E39 M62
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Bremmen Parts - Corporate Logo
T#:36100134
Part#: 11537505228
In Stock
$ 52.99

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

$ 38.99 USD
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$ 52.99

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

$ 38.99 USD
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This OEM-style upper radiator hose connects the upper radiator outlet to the thermostat housing.

If you're experiencing a leak or wear in your radiator hose, replace it with this high-quality, cost-effective replacement from Bremmen Parts to restore optimal cooling system performance.

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Thermostat Replacement Kit
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Bremmen Parts - Corporate Logo
T#:591532
Part#: 11538674895KT1KT
In Stock
Sale - Save 36% $ 93.99

This product was last offered at the strikethrough price on
12-11-2025

$ 59.79 USD
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$ 93.99

This product was last offered at the strikethrough price on
12-11-2025

$ 59.79 USD
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cable adapter, electro set
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Bremmen Parts - Corporate Logo
T#:583893
Part#: 12517646145
In Stock
Sale - Save 6% $ 30.99

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05-03-2026

$ 29.06 USD
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This product was last offered at the strikethrough price on
05-03-2026

$ 29.06 USD
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Vent Hose for N14 N18 1.6L Engine
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Bremmen Parts - Corporate Logo
T#:26238478
Part#: 11157605186
In Stock
Sale - Save 11% $ 30.99

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

$ 27.53 USD
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This product was last offered at the strikethrough price on
05-03-2026

$ 27.53 USD
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Upgrade your N14 N18 1.6L Engine with the Vent Hose. This hose connects to the top valve cover with a special hose clip end and extends to the bottom side of the intake manifold, ensuring optimal performance of your Mini. It's a crucial component of the intake system, designed to enhance engine efficiency and longevity.

  • Ensures proper ventilation of the engine
  • Connects securely to the valve cover and intake manifold
  • Facilitates efficient airflow within the engine compartment
  • Compatible with N14 N18 1.6L Engine models
  • Easy to install and replace as needed
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Thermostat Housing W/ Thermostat Kit - Bremmen
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Bremmen Parts - Corporate Logo
T#:582479
Part#: 11538674895
In Stock
Sale - Save 36% $ 80.99

This product was last offered at the strikethrough price on
12-11-2025

$ 52.01 USD
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Sale - Save 36%
$ 80.99

This product was last offered at the strikethrough price on
12-11-2025

$ 52.01 USD
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Radiator Hose - Lower
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Bremmen Parts - Corporate Logo
T#:30729026
Part#: 17123413819
In Stock
$ 46.99

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

$ 34.99 USD
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$ 46.99

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

$ 34.99 USD
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Free Shipping on orders $49 and up