BMW Coolant & Radiator Hoses

Bavarian Autosport Water Pipe - E46 E39 Z4 Z3 (M52TU, M54)

10X Entries Into Our F80 M3 Sweepstakes

T#:638085

Part#: 11537502525

In Stock

Sale - Save 20% $ 50.99

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

$ 40.79 USD

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$ 50.99

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

$ 40.79 USD

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This plastic water pipe is positioned directly underneath your intake manifold. Due to its plastic construction, it is notorious for catastrophic failure. Rapid cooling loss and overheating are both direct results of this failure, posing permanent and lasting damage to the engine.

Replace your cracked/broken coolant pipe with this high-quality Bavarian Autosport component to ensure long-term reliability and perfect fitment.

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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Bav Auto Heater Inlet Pipe - E46 E39 E53 E83 E85 Z3

10X Entries Into Our F80 M3 Sweepstakes

T#:638080

Part#: 11531705210

In Stock

Sale - Save 20% $ 40.99

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

$ 32.79 USD

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Sale - Save 20%

$ 40.99

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

$ 32.79 USD

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This is the plastic heater inlet pipe that connects the cylinder head to the heater inlet on cars with the M52 or M54 engine. The plastic on this hose becomes brittle over time and eventually leads to failure. Replace yours with a brand new Bav Auto Heater inlet pipe to prevent catastrophic failure.

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Achilles Motorsport OBD1-to-OBD2 Coolant Hose Adapter - BMW M52 S52 E...

T#:1150775

Part#: 11-AM-CHCAP-OBD1

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$ 54.99 USD

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$ 54.99 USD

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OBD2 to OBD1 Conversion Coolant Hose Adapter for E36 M52 & S52 Engines Replaces the metal pipe from the OBD2 engines with a hose adapter that allows the installation of a normal OBD1 coolant hose. This is useful when converting an OBD2 Engine to OBD1, or when swapping OBD2 engines into a car that is originally OBD1 (like an E30). The simple kit comes complete with the necessary 2 O-rings, extended bolt, Nylon Lock Nut & washers to make this a quick install. No need to wait! It is also completely reversible!

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Bav Auto Radiator Hose - Lower - E46 M52 M54

10X Entries Into Our F80 M3 Sweepstakes

T#:640203

Part#: 11531436408

In Stock

Sale - Save 26% $ 36.99

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

$ 27.49 USD

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Sale - Save 26%

$ 36.99

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

$ 27.49 USD

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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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Race German Coolant Temperature Sender Adapter - 1/8NPT

T#:6827888

Part#: RGCTSA1/8NPT

In Stock

$ 35.99

This product was last offered at the strikethrough price on
10-07-2026

$ 31.99 USD

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$ 35.99

This product was last offered at the strikethrough price on
10-07-2026

$ 31.99 USD

Limited Qty Sale

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Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for 1/8NPT sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor

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Race German Coolant Temperature Sender Adapter - M12x1.5

T#:6827887

Part#: RGCTSAM12

In Stock

$ 35.99 USD

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$ 35.99 USD

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Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for M12x1.5 sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor

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BMW N20 2.0L Turbo Supply Cooling Line

10X Entries Into Our F80 M3 Sweepstakes

T#:17704760

Part#: 11538663516

In Stock

Sale - Save 20% $ 46.99

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

$ 37.59 USD

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Sale - Save 20%

$ 46.99

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

$ 37.59 USD

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BMW N20 2.0L Turbo Supply Cooling Line is a crucial component designed to ensure optimal cooling for the turbocharger in BMW vehicles equipped with the N20 2.0L turbo engine. This high-quality cooling line maintains proper coolant flow to the turbo, preventing overheating and ensuring reliable performance.

Optimal Cooling: Effectively cools the turbocharger to prevent overheating and maintain performance.
Durable Construction: Built with high-quality materials for long-lasting reliability.
Precise Fitment: Designed specifically for BMW N20 2.0L turbo engines.
Enhanced Performance: Helps in sustaining the turbo's efficiency and longevity.
Easy Installation: Direct replacement part for a hassle-free installation.

Maintain the efficiency and longevity of your BMW’s turbocharger with this essential cooling line, designed for superior performance and durability.

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BMW N20 Turbo Cooling Return Line

10X Entries Into Our F80 M3 Sweepstakes

T#:17704762

Part#: 11538663517

In Stock

$ 68.99 USD

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$ 68.99 USD

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BMW N20 Turbo Cooling Return Line

The BMW N20 Turbo Cooling Return Line is an essential component designed to optimize the performance and longevity of your turbocharger. Turner Motorsport offers this high-quality coolant return line, ensuring efficient cooling and preventing overheating of the turbo system. Engineered for a precise fit, this cooling return line integrates seamlessly with your BMW N20 engine, providing reliable and long-lasting performance.

Benefits:

Enhances cooling efficiency to prevent turbocharger overheating
Constructed from durable materials for extended reliability
Precisely engineered for a perfect fit on BMW N20 engines
Easy to install with minimal modifications required
Helps maintain consistent turbocharger performance by managing coolant flow effectively

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MINI Cooper S Intercooler Resonator Delete Hose - Blue

T#:27871802

Part#: FMR56RDH-B

Ships in 6 Business Days

$ 171.99 USD

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$ 171.99 USD

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Rogue Engineering Silicone Radiator Hose Kit - E9X M3

T#:13694122

Part#: RADE9X-M3-ONLY

Ships in 9 Business Days

$ 79.00 USD

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$ 79.00 USD

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Benefits of Rogue Engineering Silicone Radiator Hoses More resistant to high temperatures, solvents and oil, when compared to OEM rubber hoses. Temperature ranges from -149° F to 500° F, much larger range than OEM (typical range for OEM is -40o F to +275o F) Our hoses can handle more pressure, with a maximum pressure of 350psi. Our silicone hoses stay flexible, whereas rubber can harden and crack over time. Available only in BLACK color, with discrete RE logo. All Rogue Engineering Silicone Radiator Hose kits come complete with new, replacement hose clamps as the factory ones are not suitable for reuse after long years of service. Application Notes The E9X M3 kit replaces 11537838214 and 11537840661 and fits the following: 2008-2013 E9X M3 (US and Euro) Notes: The E9X M3 hose kit requires the use of OEM connectors from the original hoses.

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MINI Cooper S Intercooler Resonator Delete Hose - Red - R55 / R56 / R...

T#:23383280

Part#: FMR56RDH-R

In Stock

$ 171.99 USD

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$ 171.99 USD

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Elevate your BMW MINI Cooper S's performance with the Intercooler Resonator Delete Hose designed to replace two OEM hoses and a sound resonator. Crafted for improved airflow and engine dynamics, this hose is a game-changer.

Key Benefits:

Enhanced Performance: Witness torque improvements of 10 to 15 ft/lbs on Forge's test car, potentially boosting horsepower when combined with other performance modifications.
Reduced Resistance: The smooth bore hose minimizes resistance by replacing the OEM resonator, ensuring improved airflow.
Engine Responsiveness: Experience noticeable changes in engine acceleration, attributed to enhanced torque and potential horsepower gains.
Customizable Options: Available in red, blue, or black, enabling a stealthy installation while adding a personalized touch.
Durability: Engineered to withstand higher temperatures and pressures compared to the original hose, ensuring long-lasting performance.

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Water Connection Pipe

10X Entries Into Our F80 M3 Sweepstakes

T#:15511839

Part#: 17111707817

In Stock

Sale - Save 20% $ 18.99

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

$ 15.19 USD

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$ 18.99

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

$ 15.19 USD

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Connects the radiator to the expansion tank

Project Cars

SELECT YOUR BMW

Bavarian Autosport Water Pipe - E46 E39 Z4 Z3 (M52TU, M54)

Bav Auto Heater Inlet Pipe - E46 E39 E53 E83 E85 Z3

Achilles Motorsport OBD1-to-OBD2 Coolant Hose Adapter - BMW M52 S52 E...

Bav Auto Radiator Hose - Lower - E46 M52 M54

Race German Coolant Temperature Sender Adapter - 1/8NPT

Race German Coolant Temperature Sender Adapter - M12x1.5

BMW N20 2.0L Turbo Supply Cooling Line

BMW N20 Turbo Cooling Return Line

BMW N20 Turbo Cooling Return Line

Benefits:

MINI Cooper S Intercooler Resonator Delete Hose - Blue

Rogue Engineering Silicone Radiator Hose Kit - E9X M3

MINI Cooper S Intercooler Resonator Delete Hose - Red - R55 / R56 / R...

Key Benefits:

Water Connection Pipe

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