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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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Elring Freeze Plug
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:591492
Part#: 11117530262
In Stock
$ 25.99

This product was last offered at the strikethrough price on
04-06-2026

$ 21.99 USD
Free Shipping on orders $49 and up
$ 21.99 USD
Free Shipping on orders $49 and up
Replace your missing freeze plug today - 110x13mm
Active Autowerke - Corporate Logo
T#:397222
Part#: 14-009
Ships in 10 Business Days
$ 56.99 USD
Free Shipping on orders $49 and up
Plastic thermostat housing cracked on your M50?

Here are your choices: you can wait for the plastic factory thermostat housing cover to break and cause major overheating. (Even with a new stock cover, it won’t take long.) Or you can install a thoughtfully engineered all-aluminum thermostat housing cover from Active Autowerke and never experience this type of failure again. Currently there is no factory upgraded part to this problem. This is an aluminum extruded part that has all of the openings machine properly to fit like factory; from the mounting bolt holes, the seating of the thermostat to the sealing opening for the ORANGE gasket. Forged to exact factory tolerances, everything fits and this unit is a true easy bolt-on – especially suited for racing or load conditions like heavy traffic, where engine temp can rise rapidly. The housing is guaranteed never to break from overheating or over-tightening, and its CNC machined surface ensures a precise seat.

Unit comes complete with a new ORANGE sealing gasket; a new thermostat is recommended but not included.
For hotter climates, a 71 degree thermostat is recommended over the 82 degree unit.

Anything and everything BMW is the mantra at Active Autowerke. Since 1981 they have been serving the BMW community with custom turbocharger kits to a myriad of other innovative and inspiring performance parts.
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Active Autowerke - Corporate Logo
T#:397219
Part#: 14-010
In Stock
5% off MSRP $ 259.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 246.99 USD
Free Shipping
5% off MSRP
$ 259.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 246.99 USD
Free Shipping

When you push your powerplant, thermodynamics push right back. The toll of high performance is higher heat load – and many stock components begin to complain. But Active Autowerke has you covered - this upgraded fan clutch increases viscous coupling of cooling fan blade speed to water pump speed, yielding increased airflow through the radiator for more efficient cooling. A simple, yet wonderful, thing.

This product fits the following BMWs:
1992-1999 E36 323i 325i 328i 330i M3
1998-2006 E46 323i 325i 328i 330i M3

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Behr - Corporate Logo
T#:1196128
Part#: 17111723784
Ships in 1 day
$ 298.99

This product was last offered at the strikethrough price on
07-15-2026

$ 267.99 USD
$ 267.99 USD
Brand new radiator equivalent to OE

Behr - Corporate Logo
T#:363371
Part#: 17111737760
Ships in 2 Business Days
$ 687.60

This product was last offered at the strikethrough price on
08-13-2026

$ 497.64 USD
$ 497.64 USD
Replace your leaking radiator
Behr - Corporate Logo
T#:591360
Part#: 17111728905
In Stock
$ 399.99

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

$ 314.72 USD
Free Shipping on orders $49 and up
$ 314.72 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.
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Active Autowerke - Corporate Logo
T#:2302749
Part#: 14-016
Ships in 10 Business Days
$ 141.99 USD
Free Shipping
$ 141.99 USD
Free Shipping
CNC machined coolant/water thermostat bypass tube to improve flow on and off the track. Easy plug and play installation and a durable anodized coating make this a simple and reliable temperature control solution.
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Behr - Corporate Logo
T#:579569
Part#: 376755591
Back Ordered
$ 267.99 USD
$ 267.99 USD
Replace your leaking radiator

BMW Water Pump Gasket
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:15247123
Part#: 11518632587
In Stock
$ 16.99

This product was last offered at the strikethrough price on
06-10-2026

$ 13.49 USD
Free Shipping on orders $49 and up
$ 13.49 USD
Free Shipping on orders $49 and up
In order to ensure a leak free driving experience, replace these gaskets whenever you change or work on your water pump. If you are noticing small leaks, these might be to blame.

Radiator Hose Gasket
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:22262157
Part#: 11537545302
In Stock
$ 12.99 USD
Free Shipping on orders $49 and up
Oil Cooler Gasket Set
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:15048412
Part#: 11428583897
Ships in 2 Business Days
$ 21.25

This product was last offered at the strikethrough price on
08-26-2026

$ 19.10 USD
Free Shipping on orders $49 and up
$ 19.10 USD
Free Shipping on orders $49 and up
Avoid leaks and other issues by replacing your oil cooler gaskets upon taking out or replacing the unit itself!
OEM Elring Coolant Pipe Gasket - E90 E70 M57 3.0L
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:2706176
Part#: 11122247745
In Stock
$ 12.99

This product was last offered at the strikethrough price on
04-22-2026

$ 8.99 USD
Free Shipping on orders $49 and up
$ 8.99 USD
Free Shipping on orders $49 and up
For the water connecting pipe attached to the head.


Elring - Corporate Logo
T#:596454
Part#: 11517549445
Ships in 1 Business Day
$ 10.99 USD
Free Shipping on orders $49 and up
Replace this gasket anytime you remove or replace the pump.
BMW Water Pump Gasket
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:15213971
Part#: 11511722677
Ships in 1 Business Day
$ 3.99

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

$ 2.99 USD
Free Shipping on orders $49 and up
$ 2.99 USD
Free Shipping on orders $49 and up
When it comes time to replace the water pump, be sure to replace all the associated gaskets and o-rings to ensure a leak free installation. This gasket seals the water pump to the engine block to keep your engine free from coolant loss, preventing overheating issues.
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Behr - Corporate Logo
T#:33047035
Part#: 17117634565
Ships in 1 day
$ 156.99

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

$ 122.99 USD
Free Shipping on orders $49 and up
$ 122.99 USD
Free Shipping on orders $49 and up

10,82x1,78 RD HNBR SH65
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:15015311
Part#: 17227581147
Ships in 2 Business Days
$ 3.99

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

$ 2.99 USD
Free Shipping on orders $49 and up
$ 2.99 USD
Free Shipping on orders $49 and up
O-ring for oil cooler

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
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Active Autowerke - Corporate Logo
T#:5886968
Part#: 15-012
Ships in 3 Business Days
$ 2,849.99 USD
Free Shipping
$ 2,849.99 USD
Free Shipping
BMW's S55 motor is a modern marvel but one weak point, which Active identified is the entire cooling system for the intake which comprises the charge pipe, the aftercooler and the heat exchanger (or radiator). Finally there is a S55 aftercooler kit upgrade that is good enough to carry the Active Autowerke brand. Years of success in developing cars for motorsport has allowed Active to leverage its expertise to the top-mount charge air cooler on the F80 M3, F82 M4 and F87 M2 Competition. This aftercooler was made for the S55 and crafted using only high-grade aluminum to outperform the factory aftercooler in all situations from everyday driving to the toughest racing. The factory cooler was built to support a specific power target and environment. Many of you have increased the performance of the S55 which quickly overwhelms the stock cooler leading to heat soak and higher intake air temperatures which triggers the ECU to downgrade the performance until cooler air returns. Active's focus was not on a mass-market aesthetic add-on but a properly engineered improvement over the existing hardware. Active uses a tube-and-fin core designed specifically for the S55 and included turbulators to maximize the cooling efficiency in as small a package as possible. The end tanks are billet machined aluminum, not cast, folded, or bonded and ensure even distribution of the water throughout the internal aftercooler cores. High precision fittings, CNC machining, and TIG welding throughout ensures the highest quality construction to prevent pressure loss, and the lowest weight, in a bolt-on replacement. But Active also didn’t leave the aesthetics by the wayside as we dip the visible top of the aftercooler in a carbon fiber coating giving your installed cooling system a decidedly top market look to match the improved cooling performance. The Active silicone charge pipes for the F80 M3, F82/F83 M4 and the F87 M2 Competition improve the flow over the stock, compressed plastic pipes. The Active Silicone Charge Pipes allow you to maximize power on your F8X by securing all the boost that your S55 is making. These pipes replace the hot-side pipes leaving the turbos and into the top-mount aftercooler. The stock S55 charge pipes are notorious for developing hairline fractures at their plastic seams. These fractures or cracks are unnoticeable to the naked eye, but under boost pressure they open up leaking the desired charged air into the engine bay, and consequently can rob your S55 of it's full power potential. In addition, these leaks can trigger your S55's turbochargers to work harder to hit and maintain target boost pressure, potentially wearing them out sooner. Active uses silicone in this area because it will not contribute to heat soak and it's easier to mold for the correct clearances. Active uses a 5-layer silicone hose with all needed adapters and stainless hose clamps included. It fits perfectly with our CNC’d top-mount cooler.
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Elring Water Pump Gasket
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:591724
Part#: 11517793796
Ships in 2 Business Days
$ 10.99

This product was last offered at the strikethrough price on
08-26-2026

$ 9.99 USD
Free Shipping on orders $49 and up
$ 9.99 USD
Free Shipping on orders $49 and up
Seals the water pump to the engine
BMW Oil Cooler Gasket
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:15213979
Part#: 11428513448
Ships in 1 Business Day
$ 25.99

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

$ 24.99 USD
Free Shipping on orders $49 and up
$ 24.99 USD
Free Shipping on orders $49 and up
Replace your oil cooler gasket whenever you replace your oil cooler! Prevent leaks and help you engine perform to its maximum capacity!

M7 Speed - Corporate Logo
T#:386325
Part#: 53-3M7104
Ships in 3 Business Days
Sale - Save 6% $ 49.99

This product was last offered at the strikethrough price on
08-31-2026

$ 47.03 USD
Free Shipping on orders $49 and up
Sale - Save 6%
$ 49.99

This product was last offered at the strikethrough price on
08-31-2026

$ 47.03 USD
Free Shipping on orders $49 and up

Have you ever noticed how crisp and responsive your MINI was after that initial warm-up period, and wanted to keep that feeling for the rest of the day? This 180° F Thermostat is the solution. Not only does the engine maintain its fresh-start power, but also the under-hood temperatures are greatly diminished (see comparison table below). Now when your car sits after a hard run it won't cook and dry out everything under the hood as bad as it did in the stock configuration. This is great for the MINI owner that lives in a hot climate, or those that push their cars hard at the track or local twisty road.

Please Note: This thermostat does not include a replacement gasket. Reuse the gasket from the OEM thermostat.

Cold Weather Alert: If you encounter weather below 50º F or 10º C, please be aware that the ECU could throw a “check engine” light. This is no cause for alarm as the sensors are registering an anomaly and the thermostat is not harming the engine. The “check engine” light can be reset with a diagnostic tool or left as is. Please call if you have questions.
 

Test ParametersThermostat Temp OriginalThermostat Temp M7180Delta (°F)

Intercooler Manifold9870-28

Upper Coolant Hose190179-11

Supercharger at Pulley Shaft Housing178160-18

Head at Thermostat174153-21

Idle w A/C on214185-29

Coolant Temp During Hard Driving212180-32

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Behr Radiator Replacement
For Automatic Vehicles only
Behr - Corporate Logo
T#:591355
Part#: 17117519211
Ships in 1 Business Day
$ 454.11

This product was last offered at the strikethrough price on
08-17-2026

$ 388.67 USD
$ 388.67 USD
Replace your faulty or worn radiator with this factory replacement
Behr - Corporate Logo
T#:594798
Part#: 17117576827
Ships in 1 day
$ 415.99 USD
Free Shipping on orders $49 and up
Replacement Radiator from Behr Hella
Gasket, Water Pump (Cooling System)
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:54852013
Part#: B47.470
Ships in 5 Business Days
New Item
$ 11.99 USD
Free Shipping on orders $49 and up
Upgrade your worn components with this high-quality piece and drive with the confidence that your engine is sealed tight and performing at its absolute best.


Behr - Corporate Logo
T#:594800
Part#: 17117605644
Ships on Sep 22, 2026
$ 362.99 USD
$ 362.99 USD
Replacement Radiator from Behr
Behr - Corporate Logo
T#:594801
Part#: 17117570094
Ships on Sep 22, 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.
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Engine Water Pump Gasket Kit
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:54317216
Part#: 359.200
In Stock
New Item
$ 12.99 USD
Free Shipping on orders $49 and up
This Elring water pump gasket set is the perfect solution for refreshing your BMW's cooling circuit during a water pump service or cooling system overhaul.

Elring Coolant Pipe O-Ring Seal - BMW N52 3.0L
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:45415209
Part#: 266.480
In Stock
$ 2.99 USD
Free Shipping on orders $49 and up
Seals the connection between the water pump hose and the engine inlet Replaces BMW # 11517514942

OEM Elring Water Pump Gasket - BMW Gen1 B46/B48 2.0L
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:45483624
Part#: B07.530
Ships on Sep 23, 2026
$ 7.99 USD
Free Shipping on orders $49 and up
$ 7.99 USD
Free Shipping on orders $49 and up
If your water pump has to be removed or is already leaking coolant, it is important to replace the gaskets to prevent coolant loss and overheating.
Elring - Corporate Logo
T#:45483627
Part#: 773.780
Special Order: No Guaranteed ETA
$ 12.99 USD
Free Shipping on orders $49 and up
$ 12.99 USD
Free Shipping on orders $49 and up
This gasket seals the connection between the mechanical water pump support bracket and the engine block. Replaces BMW # 11518632586

Elring Thermostat Gasket - BMW M44 1.9L
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:45244504
Part#: 743.390
Special Order: No Guaranteed ETA
$ 7.99 USD
Free Shipping on orders $49 and up
This gasket prevents the coolant from leaking between the thermostat housing and the engine connection. If your gasket is cracked, replace it with this Elring gasket to prevent further coolant leaks.
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Elring Thermostat O-Ring - BMW S54 3.2L
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:45278657
Part#: 293.300
Special Order: No Guaranteed ETA
$ 3.99 USD
Free Shipping on orders $49 and up
Seals the thermostat and thermostat housing to the water pump Replaces BMW # 11531318402

Elring Thermostat Gasket - BMW M60 M62 M70 S70
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:45005599
Part#: 818.437
Special Order: No Guaranteed ETA
$ 2.99 USD
Free Shipping on orders $49 and up
This rubber gasket seals the junction between the thermostat and water pump Measurements: 4.0x76.5mm

BMW Oil Cooler Gasket Set
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:15048422
Part#: 11428580681
Special Order: No Guaranteed ETA
$ 11.99 USD
Free Shipping on orders $49 and up
Replace your oil cooler gaskets whenever you remove and reinstall your oil cooler!
Gasket Ring
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:9642130
Part#: 11537577650
Back Ordered
$ 3.99 USD
Free Shipping on orders $49 and up
BMW Thermostat Gasket
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:15048409
Part#: 11531250357
Back Ordered
$ 4.99

This product was last offered at the strikethrough price on
05-08-2026

$ 3.99 USD
Free Shipping on orders $49 and up
$ 3.99 USD
Free Shipping on orders $49 and up
Whether you are just doing general maintenance or noticing some symptoms of a failing gasket, it's always a good idea to replace your gaskets anytime your engine components are removed. Get your replacement gasket here today!
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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
O-Ring - Coolant Pipe - BMW
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:14949060
Part#: 11411304178
Back Ordered
$ 3.99

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

$ 2.99 USD
Free Shipping on orders $49 and up
$ 2.99 USD
Free Shipping on orders $49 and up
Over time, o-rings will wear and eventually fail, leading to leaks and other issues. Avoid this by replacing them with new examples!