BMW Cooling System Parts & Accessories for BMW 4 Series F36 (2015+)

Clear BMW chassis

Please ensure your correct model is selected

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.

Sub-Categories

Sort By:

OEM Style Hose Clamps
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Turner Motorsport - Corporate Logo
T#:338927
Part#: HOSE-CLAMPS
In Stock
Sale - Save 3% $ 3.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 3.87 USD
Free Shipping on orders $49 and up
Sale - Save 3%
$ 3.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 3.87 USD
Free Shipping on orders $49 and up
Hose clamps for radiator hoses, coolant hoses, vacuum hoses, or intake hoses. These hose clamps are the same style as your OEM hoses with a smooth inside band to prevent cutting into the hose material.
Show More Show Less
Turner Motorsport Silicone Radiator Hoses - F2X F3X N20
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Turner Motorsport - Corporate Logo
T#:50311460
Part#: 008745LA01-01
In Stock
New Item
Sale - Save 25% $ 101.99

This product was last offered at the strikethrough price on
06-14-2026

$ 76.49 USD
Free Shipping
Sale - Save 25%
$ 101.99

This product was last offered at the strikethrough price on
06-14-2026

$ 76.49 USD
Free Shipping

Tired of dealing with brittle, dry-rotted rubber hoses? Whether you're refreshing your cooling system or replacing aging components, our Silicone Radiator Coolant Hose Set is the ultimate upgrade. Designed for durability, performance, and a factory-perfect fit, these premium silicone hoses outperform standard rubber in every way.

Why Choose Silicone Over Rubber?

Made from heavy-duty, reinforced 4-ply fluorosilicone, Turner Motorsport hoses withstand extreme temperatures and pressures far beyond OEM rubber hoses. Engineered to resist oil, fuel, and electrochemical degradation, these hoses are tested for continuous operation at 250°F and over 45 psi, delivering superior reliability, reduced turbulence, and improved coolant flow.

Replaces OEM Part Numbers: 17127596837 & 17127596838. Can be used with your factory connectors.

Show More Show Less
Turner Motorsport Silicone Radiator Hoses (With OE Connectors) - F2X ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Turner Motorsport - Corporate Logo
T#:50311459
Part#: 008745LA02
In Stock
New Item
$ 189.99 USD
Free Shipping
$ 189.99 USD
Free Shipping

Tired of dealing with brittle, dry-rotted rubber hoses? Whether you're refreshing your cooling system or replacing aging components, our Silicone Radiator Coolant Hose Set is the ultimate upgrade. Designed for durability, performance, and a factory-perfect fit, these premium silicone hoses outperform standard rubber in every way.

Why Choose Silicone Over Rubber?

Made from heavy-duty, reinforced 4-ply fluorosilicone, Turner Motorsport hoses withstand extreme temperatures and pressures far beyond OEM rubber hoses. Engineered to resist oil, fuel, and electrochemical degradation, these hoses are tested for continuous operation at 250°F and over 45 psi, delivering superior reliability, reduced turbulence, and improved coolant flow.

Replaces OEM Part Numbers: 17127596837 & 17127596838. Pre-assembled with factory "quick-connect" hose ends for easy installation!

Show More Show Less

Thermostat With Aluminum Housing - N20
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:30828065
Part#: 11538635689M
In Stock
Sale - Save 20% $ 125.99

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

$ 100.36 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 125.99

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

$ 100.36 USD
Free Shipping on orders $49 and up

Coolant Hose - Return Line
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:30729013
Part#: 17128570061
In Stock
Sale - Save 19% $ 36.99

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

$ 29.99 USD
Free Shipping on orders $49 and up
Sale - Save 19%
$ 36.99

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

$ 29.99 USD
Free Shipping on orders $49 and up
Thermostat - B48
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with the Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines
Bremmen Parts - Corporate Logo
T#:23648673
Part#: 11537644811
In Stock
Sale - Save 15% $ 223.99

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

$ 190.39 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 223.99

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

$ 190.39 USD
Free Shipping on orders $49 and up

Engine Coolant Expansion Tank
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:30729009
Part#: 17138677649
In Stock
Sale - Save 12% $ 85.99

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

$ 75.59 USD
Free Shipping on orders $49 and up
Sale - Save 12%
$ 85.99

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

$ 75.59 USD
Free Shipping on orders $49 and up
Hose F Engine Inlet-Changeover Valve
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:30729011
Part#: 17128616914
In Stock
Sale - Save 21% $ 70.99

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

$ 56.30 USD
Free Shipping on orders $49 and up
Sale - Save 21%
$ 70.99

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

$ 56.30 USD
Free Shipping on orders $49 and up

Junction Heat Hose - 11538606278
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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
Free Shipping on orders $49 and up
Sale - Save 21%
$ 54.99

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

$ 43.24 USD
Free Shipping on orders $49 and up

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.

Show More Show Less

Cylinder Head Expansion Tank Hose - Priced Each
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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
Free Shipping on orders $49 and up
Sale - Save 21%
$ 30.99

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

$ 24.47 USD
Free Shipping on orders $49 and up
Coolant Hose - Upper
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:30729014
Part#: 17127604542
Ships on Aug 24, 2026
Sale - Save 12% $ 41.99

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

$ 36.89 USD
Free Shipping on orders $49 and up
Sale - Save 12%
$ 41.99

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

$ 36.89 USD
Free Shipping on orders $49 and up
Coolant Hose - Upper
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:30729016
Part#: 17127596837
In Stock
Sale - Save 21% $ 65.99

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

$ 52.22 USD
Free Shipping on orders $49 and up
Sale - Save 21%
$ 65.99

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

$ 52.22 USD
Free Shipping on orders $49 and up


Coolant Expansion Tank Cap
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:36032339
Part#: 17117639020
In Stock
Sale - Save 20% $ 14.99

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

$ 11.99 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 14.99

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

$ 11.99 USD
Free Shipping on orders $49 and up
Bremmen Water Pump Bolt - M8x34 - BMW N20 2.0L
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:36913363
Part#: 11517602125
In Stock
Sale - Save 35% $ 4.99

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

$ 3.26 USD
Free Shipping on orders $49 and up
Sale - Save 35%
$ 4.99

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

$ 3.26 USD
Free Shipping on orders $49 and up

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.

Coolant Hose - Lower
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:48125816
Part#: 17127596838
Ships on Aug 10, 2026
Sale - Save 15% $ 30.99

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

$ 26.34 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 30.99

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

$ 26.34 USD
Free Shipping on orders $49 and up

Connects the radiator to the thermostat.

Maintain optimal cooling performance with this high-quality Lower Radiator Hose (17127596838), built to match OEM dimensions for a seamless fit on your BMW. Designed to handle high heat and constant pressure, it ensures consistent coolant flow from the radiator to the thermostat housing. Perfect for preventative maintenance or replacing a failing hose, this direct-fit component helps safeguard your engine from overheating and keeps your cooling system operating at peak efficiency.

Show More Show Less