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MTC 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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Aftermarket Thermostat Housing - E30 325e 325i, E34 525i - M20 engine...
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T#:359592
Part#: 11531730470
In Stock
$ 33.99 USD
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This is the stock aluminum thermostat housing for cars with the M20 6 cylinder engine - 325e, 325i, 528e, 525i. This is the side of the housing that mounts to the cylinder head and has openings for the various coolant / engine temperature sensors. There are 4 ports for sensors so check your existing housing for the sensor layout.

Mission Trading Company is a worldwide leader in the manufacturing of European, Japanese and domestic auto parts. With factories around the world producing parts to the most stringent of standards MTC is there with the parts for your next project.


This item fits the following BMWs:
1984-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
5/1982-1988 E28 BMW 528e
1989-1990 E34 BMW 525i

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BMW E30 Auxiliary Fan Assembly
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MTC - Corporate Logo
T#:371530
Part#: 64541381395
Ships in 7 Business Days
$ 151.99 USD
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$ 151.99 USD
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Turner Motorsport presents a high-quality replacement solution for your BMW's electrical fan assembly. If your electric fans have ceased to function, suffered damage, or were impacted by a front-end collision, this product is the answer you've been looking for.

This electric fan assembly comprises both the fan motor and fan blade, delivering a comprehensive replacement that seamlessly fits and operates without a hitch. The wiring connections are identical to the stock unit, ensuring a straightforward installation process. You can rely on this factory replacement part from Turner Motorsport to keep your vehicle's temperature gauge within the "Normal" range throughout your drives.

Prior to placing your order, it's advisable to conduct an inspection of all hoses, connections, and flanges within your cooling system to confirm their condition and rule out any damage or wear. If you require further upgrades or replacements, Turner Motorsport offers a diverse range of factory coolant system components to ensure your vehicle remains in optimal condition.

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Expansion Tank Mount
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MTC - Corporate Logo
T#:362947
Part#: 17111438819
Ships in 9 Business Days
$ 41.99 USD
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$ 41.99 USD
Free Shipping on orders $49 and up
Found on the left side of the radiator

Rubber Bushing Insert for Upper Radiator Bracket - E36 E34
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MTC - Corporate Logo
T#:7464
Part#: 17201719414
In Stock
$ 3.05

This product was last offered at the strikethrough price on
05-11-2026

$ 2.03 USD
Free Shipping on orders $49 and up
$ 2.03 USD
Free Shipping on orders $49 and up

BMW RADIATOR RUBBER MOUNTING 17201719414

Mission Trading Company is a worldwide leader in the manufacturing of European, Japanese and domestic auto parts. With factories around the world producing parts to the most stringent of standards, MTC is there with the parts for your next project.

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Radiator Support Bracket
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MTC - Corporate Logo
T#:371231
Part#: 17117514402
In Stock
$ 8.99

This product was last offered at the strikethrough price on
03-17-2026

$ 5.09 USD
Free Shipping on orders $49 and up
$ 5.09 USD
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MTC Charge Air Cooler Expansion Tank - BMW F22/23 F3X B48/B46 B58 ...
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MTC - Corporate Logo
T#:27405534
Part#: 17138617045
Ships in 9 Business Days
$ 64.46 USD
Free Shipping on orders $49 and up
Your charge air cooler's coolant expansion tank acts as a reservoir, housing extra coolant, and gives fluid a place to go after expansion and contraction from temperature change. Because the plastic tank is subjected to regular temperature changes, the plastic can become brittle over time and will often crack or break. If your tank is leaking and you lose too much coolant, your charge air cooler will not function properly and your air intake temperatures will begin to rise, reducing horsepower and efficiency. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it.
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Expansion Tank Cap
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MTC - Corporate Logo
T#:371228
Part#: 17111742232
Ships in 9 Business Days
$ 6.99 USD
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$ 6.99 USD
Free Shipping on orders $49 and up
1.4 Bar pressure. Older radiator caps being to lose their ability to hold pressure over time. Resulting in a lower boiling point for the coolant system.
Lower Radiator Mount - Priced Each
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MTC - Corporate Logo
T#:361005
Part#: 17111178412
Back Ordered
$ 2.03 USD
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This is the small lower rubber mount that goes on the bottom of the radiator. These mounts sit down into mount 17111723337. Fits left or right side - priced each