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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

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T#:591492

Part#: 11117530262

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$ 25.99

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

$ 21.99 USD

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$ 21.99 USD

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Replace your missing freeze plug today - 110x13mm

Aluminum Thermostat Housing Kit - M50

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T#:397222

Part#: 14-009

In Stock

$ 56.99

This product was last offered at the strikethrough price on
06-18-2026

$ 52.99 USD

Limited Qty Sale

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$ 56.99

This product was last offered at the strikethrough price on
06-18-2026

$ 52.99 USD

Limited Qty Sale

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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 Sport Fan Clutch - E36 E46

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T#:397219

Part#: 14-010

Ships in 2 Business Days

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

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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

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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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Oil Cooler Gasket Set

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T#:15048412

Part#: 11428583897

In Stock at Vendor

$ 21.25 USD

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$ 21.25 USD

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Avoid leaks and other issues by replacing your oil cooler gaskets upon taking out or replacing the unit itself!

Active Autowerke Thermostat Bypass/Delete Tube - S65

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T#:2302749

Part#: 14-016

Ships in 10 Business Days

$ 141.99 USD

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$ 141.99 USD

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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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BMW Water Pump Gasket

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T#:15247123

Part#: 11518632587

In Stock

$ 20.99

This product was last offered at the strikethrough price on
01-31-2026

$ 13.49 USD

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$ 13.49 USD

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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.

OEM Elring Coolant Pipe Gasket - E90 E70 M57 3.0L

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T#:2706176

Part#: 11122247745

In Stock

$ 12.99

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

$ 8.99 USD

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$ 8.99 USD

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For the water connecting pipe attached to the head.

Radiator Hose Gasket

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T#:22262157

Part#: 11537545302

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$ 12.99 USD

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$ 12.99 USD

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Elring Water Pump Gasket - E70, E71, F01, F02, F10, F12, F13, F15, F1...

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T#:596454

Part#: 11517549445

Ships in 1 Business Day

$ 10.99 USD

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$ 10.99 USD

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Replace this gasket anytime you remove or replace the pump.

BMW Water Pump Gasket

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T#:15213971

Part#: 11511722677

In Stock at Vendor

$ 3.99

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

$ 2.99 USD

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$ 2.99 USD

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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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10,82x1,78 RD HNBR SH65

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T#:15015311

Part#: 17227581147

In Stock at Vendor

$ 3.99

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

$ 2.99 USD

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$ 2.99 USD

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O-ring for oil cooler

Elring Water Pump Gasket

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T#:591724

Part#: 11517793796

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$ 10.99 USD

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Seals the water pump to the engine

Active Autowerke Cnc Aftercooler Cooling Kit - F8x S55

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T#:5886968

Part#: 15-012

Ships in 3 Business Days

$ 2,849.99 USD

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$ 2,849.99 USD

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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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BMW Oil Cooler Gasket

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T#:15213979

Part#: 11428513448

In Stock at Vendor

$ 25.99

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

$ 24.99 USD

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$ 24.99 USD

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Replace your oil cooler gasket whenever you replace your oil cooler! Prevent leaks and help you engine perform to its maximum capacity!

Gasket, Water Pump (Cooling System)

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T#:54852013

Part#: B47.470

Ships in 10 Business Days

$ 11.99 USD

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$ 11.99 USD

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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.

Engine Water Pump Gasket Kit

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T#:54317216

Part#: 359.200

In Stock

$ 12.99 USD

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$ 12.99 USD

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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.

OEM Elring Water Pump Gasket - BMW Gen1 B46/B48 2.0L

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T#:45483624

Part#: B07.530

Ships on Jul 27, 2026

$ 7.99 USD

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$ 7.99 USD

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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 Engine Block Water Pump Gasket - BMW F22/23 F3X G30 G01 G02 B5...

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T#:45483627

Part#: 773.780

Special Order: No Guaranteed ETA

$ 12.99 USD

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$ 12.99 USD

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This gasket seals the connection between the mechanical water pump support bracket and the engine block. Replaces BMW # 11518632586

Elring Coolant Pipe O-Ring Seal - BMW N52 3.0L

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T#:45415209

Part#: 266.480

Special Order: No Guaranteed ETA

$ 2.99 USD

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$ 2.99 USD

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Seals the connection between the water pump hose and the engine inlet Replaces BMW # 11517514942

Elring Thermostat O-Ring - BMW S54 3.2L

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T#:45278657

Part#: 293.300

Special Order: No Guaranteed ETA

$ 3.99 USD

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$ 3.99 USD

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Seals the thermostat and thermostat housing to the water pump Replaces BMW # 11531318402

Elring Thermostat Gasket - BMW M44 1.9L

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T#:45244504

Part#: 743.390

Special Order: No Guaranteed ETA

$ 7.99 USD

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$ 7.99 USD

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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 Gasket - BMW M60 M62 M70 S70

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T#:45005599

Part#: 818.437

Special Order: No Guaranteed ETA

$ 2.99 USD

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$ 2.99 USD

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This rubber gasket seals the junction between the thermostat and water pump Measurements: 4.0x76.5mm

BMW Oil Cooler Gasket Set

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T#:15048422

Part#: 11428580681

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$ 11.99 USD

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$ 11.99 USD

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Replace your oil cooler gaskets whenever you remove and reinstall your oil cooler!

O-Ring - Coolant Pipe - BMW

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T#:14949060

Part#: 11411304178

Back Ordered

$ 3.99

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

$ 2.99 USD

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$ 2.99 USD

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Over time, o-rings will wear and eventually fail, leading to leaks and other issues. Avoid this by replacing them with new examples!

Gasket Ring

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T#:9642130

Part#: 11537577650

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$ 3.99 USD

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$ 3.99 USD

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BMW Thermostat Gasket

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T#:15048409

Part#: 11531250357

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$ 4.99

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

$ 3.99 USD

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$ 3.99 USD

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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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