Find Parts That Fit Your Vehicle

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.

Sub-Categories

Sort By:

Aftermarket Thermostat Housing - E30 325e 325i, E34 525i - M20 engine...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
MTC - Corporate Logo
T#:359592
Part#: 11531730470
Ships in 6 Business Days
$ 33.99 USD
Free Shipping on orders $49 and up

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

Show More Show Less
BMW E30 Auxiliary Fan Assembly
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
MTC - Corporate Logo
T#:371530
Part#: 64541381395
Back Ordered
$ 151.99 USD
Free Shipping
$ 151.99 USD
Free Shipping

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.

Show More Show Less
Behr Radiator - E36
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:1196128
Part#: 17111723784
In Stock at Vendor
$ 298.35 USD
$ 298.35 USD
Brand new radiator equivalent to OE

Radiator
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:591360
Part#: 17111728905
In Stock at Vendor
$ 399.99

This product was last offered at the strikethrough price on
05-07-2026

$ 388.99 USD
Free Shipping on orders $49 and up
$ 388.99 USD
Free Shipping on orders $49 and up
Behr Replacement Radiator - More than likely, you are going to replace the radiator in your vehicle at least once. The joints where the cores meet the end tanks tend to get weak and are the first place to spring a leak. Impacts to the fins themselves can cause holes to form. Corrosion and clogging from the inside can make cooling less than effective and compromise coolant flow.
Show More Show Less

Hella Radiator - Manual - E34
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:363371
Part#: 17111737760
In Stock at Vendor
$ 687.60 USD
$ 687.60 USD
Replace your leaking radiator
Expansion Tank Mount
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
MTC - Corporate Logo
T#:362947
Part#: 17111438819
Ships in 9 Business Days
$ 41.99 USD
Free Shipping on orders $49 and up
$ 41.99 USD
Free Shipping on orders $49 and up
Found on the left side of the radiator

Behr Radiator - E60, E61, E63, E64
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:579569
Part#: 376755591
Back Ordered
$ 267.99 USD
$ 267.99 USD
Replace your leaking radiator
Rubber Bushing Insert for Upper Radiator Bracket - E36 E34
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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.

Show More Show Less

Radiator Support Bracket
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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
Free Shipping on orders $49 and up

REMOTE RADIATOR
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:33047035
Part#: 17117634565
In Stock at Vendor
$ 156.99

This product was last offered at the strikethrough price on
05-07-2026

$ 151.99 USD
Free Shipping on orders $49 and up
$ 151.99 USD
Free Shipping on orders $49 and up
E46 323/325/328/330 Manual, Z4 OEM Behr Radiator
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:338021
Part#: 17119071518
In Stock at Vendor
Starting at $ 249.99 USD
Starting at $ 249.99 USD
This is a BEHR brand (OEM supplier to BMW) replacement radiator for all 1999-2006 E46 3 series (non-M), including 323i, 323Ci, 328i, 328Ci, 325i, 325Ci, 330i, 330Ci, and Z4 2.5 and 3.0. Compare to BMW list price of $318! Save big, while still getting the highest quality radiator available for your BMW.

This radiator fits the follow BMWs: :
Only for Manual Transmission
1999-5/2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi - Not for cars with M56 engine

2003-2006 E85 BMW Z4 2.5i Z4 3.0i - M54 engine
2006-2008 E85 BMW Z4 M Roadster M Coupe
Show More Show Less
Behr Radiator Replacement
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For Automatic Vehicles only
Behr - Corporate Logo
T#:591355
Part#: 17117519211
In Stock at Vendor
$ 454.11 USD
$ 454.11 USD
Replace your faulty or worn radiator with this factory replacement


Radiator
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:594798
Part#: 17117576827
Ships in 1-2 days
$ 415.99 USD
Free Shipping on orders $49 and up
Replacement Radiator from Behr Hella
MTC Charge Air Cooler Expansion Tank - BMW F22/23 F3X B48/B46 B58 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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.
Show More Show Less
Expansion Tank Cap
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
MTC - Corporate Logo
T#:371228
Part#: 17111742232
Ships in 9 Business Days
$ 6.99 USD
Free Shipping on orders $49 and up
$ 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.

Radiator
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:594801
Part#: 17117570094
Ships on Jul 28, 2026
$ 374.99 USD
$ 374.99 USD
More than likely, you are going to replace the radiator in your vehicle at least once. The joints at where the cores meet the ends tend to get weak and are the first place to spring a leak. Impacts to the fins themselves can cause holes to form. Corrosion and clogging from the inside can make it less than effective. Replace your leaking unit with a factory replacement and get that jug of coolant out of your back seat.
Show More Show Less

Radiator
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:594800
Part#: 17117605644
Ships on Jul 28, 2026
$ 362.99 USD
$ 362.99 USD
Replacement Radiator from Behr
Lower Radiator Mount - Priced Each
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
MTC - Corporate Logo
T#:361005
Part#: 17111178412
Back Ordered
$ 2.03 USD
Free Shipping on orders $49 and up
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

Behr Radiator - E34
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Behr - Corporate Logo
T#:1195792
Part#: 17111723467
Back Ordered
$ 273.99

This product was last offered at the strikethrough price on
05-07-2026

$ 265.99 USD
$ 265.99 USD
OE replacement radiator