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BMW Cooling System Parts & Accessories for BMW 3 Series E36 (1992-1998)

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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Facet Coolant Temperature Sensor - E36, Z3

For vehicles with production date from 03/1997

T#:12824

Part#: 61318376440

Ships in 1-2 days

$ 41.49

This product was last offered at the strikethrough price on
10-13-2026

$ 37.99 USD

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$ 37.99 USD

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Engine radiator double temperature fan switch, 80/88 degree celsius. This switch is designed to activate the auxiliary fan at the specified temperatures.

This item fits the following BMWs:
1996-1998 E36 BMW 318i 318is 318ti 318ic
1996-1998 Z3 BMW Z3 1.9

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Facet Auxiliary Fan Switch – 80-88°C - E36, Z3

For vehicles with production date up to 03/1997

T#:374929

Part#: 61318361787

Ships in 5 Business Days

$ 38.20

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

$ 35.60 USD

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$ 35.60 USD

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Restore the function of your fans.

Facet Radiator Fan Switch - E36 1996-1999, Z3 1997-2002

T#:641875

Part#: 61318363677

In Stock

$ 39.38

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

$ 35.61 USD

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$ 35.61 USD

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This is the E36, Z3 engine radiator double temperature fan switch, 91/99 degree Celsius. This switch is designed to activate the auxiliary fan at the specified temperatures. A faulty switch can lead to the auxiliary fan not activating, causing overheating. This item fits the following BMWs: 1996-1998 E36 BMW 323is 323ic 328i 328is 328ic M3 5/1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe

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Aluminum Thermostat Housing Kit - M50

T#:397222

Part#: 14-009

Ships in 10 Business Days

$ 56.99 USD

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$ 56.99 USD

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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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Facet Radiator Fan Switch - E24, E28, E30, E31, E32, E34, E36, Z3 ...

For vehicles with production date up to 09/1995

T#:375144

Part#: 61311378073

Ships in 1 Business Day

$ 44.99 USD

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$ 44.99 USD

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Measures radiator air temperature enabling the fan to turn off or on

Active Autowerke Sport Fan Clutch - E36 E46

T#:397219

Part#: 14-010

Ships in 1 Business Day

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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Coolant Temperature Sender

T#:586992

Part#: 12621747281

Ships in 1 Business Day

$ 23.99

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

$ 20.99 USD

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$ 20.99 USD

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BMW Cooling System Parts & Accessories for BMW 3 Series E36 (1992-1998)

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Facet Coolant Temperature Sensor - E36, Z3

Facet Auxiliary Fan Switch – 80-88°C - E36, Z3

Facet Radiator Fan Switch - E36 1996-1999, Z3 1997-2002

Aluminum Thermostat Housing Kit - M50

Facet Radiator Fan Switch - E24, E28, E30, E31, E32, E34, E36, Z3 ...

Active Autowerke Sport Fan Clutch - E36 E46

Coolant Temperature Sender

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