BMW Thermostats for BMW 5 Series E34 (1987-1995)

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BMW thermostats are known to fail, but luckily they typically fail wide open - meaning that your car can still cool. We offer thermostats from various OE suppliers we trust along with upgraded motorsport specific thermostats where applicable to make sure your BMW stays cool on track.
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URO Aluminum Thermostat Housing - E34 E36 Z3 M50/52 S50/52
URO Aluminum Thermostat Housing - E34 E36 Z3 M50/52 S50/52
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:14587
Part#: 11531722531
In Stock
$ 21.99 USD
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$ 21.99 USD
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The plastic thermostat cover in your BMW is a known point of failure. Throughout the years of repeated contact with hot coolant, the plastic can crack and cause massive coolant leaks and potential overheating. Eliminate one of the weak links in your cooling system with a replacement aluminum thermostat housing. By installing this aluminum unit, you have no worries as far as plastic housing cracks go. This is the last thermostat housing you will need to put on your vehicle.
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Mahle-Behr Thermostat - 79º C - E34, E39, E52
Mahle-Behr Thermostat - 79º C - E34, E39, E52
Mahle - Corporate Logo
T#:341209
Part#: 11537835558
Ships in 2 Business Days
$ 74.00

This product was last offered at the strikethrough price on
06-05-2026

$ 61.49 USD
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$ 61.49 USD
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Includes sealing o-ring
Aluminum Thermostat Housing Kit - M50
Aluminum Thermostat Housing Kit - M50
Active Autowerke - Corporate Logo
T#:397222
Part#: 14-009
Ships on Oct 23, 2026
$ 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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Mahle-Behr Thermostat - 92C - E34, E36, E39
Mahle-Behr Thermostat - 92C - E34, E36, E39
Mahle - Corporate Logo
T#:12476
Part#: 11537511083
In Stock
$ 30.99 USD
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$ 30.99 USD
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OEM BMW THERMOSTAT:115040
Thermostat - 80°C
Thermostat - 80°C
Mahle - Corporate Logo
T#:594727
Part#: 11531713040
Ships on Oct 26, 2026
$ 35.99 USD
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$ 35.99 USD
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The thermostat on your vehicle controls the flow of coolant based on temperature. When you just start your engine, the thermostat remains closed to accelerate the warm up process. After a few minutes, it opens up to allow the warm fluid to flow. If your vehicle is overheating but not blowing warm air from the heater, the problem is more than likely your thermostat.
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Aluminum Thermostat Housing Cover - E32 E34 E38 E31 with M60 V8 engine
Aluminum Thermostat Housing Cover - E32 E34 E38 E31 with M60 V8 engin...
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:2369
Part#: 11531720173
Ships in 2 Business Days
$ 11.00 USD
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$ 11.00 USD
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This aluminum thermostat housing cover is a direct replacement for the factory unit. It fits BMW E32 740i 740il E34 530i 540i E38 740i 740il 1995, E31 840i thru 1995.

With more than 4,000 European vehicle replacement parts, URO is no stranger to the market. Superior metal stock and extremely strict quality control are at the forefront of URO’s agenda and it shows as they become the OE supplier for more and more car companies every single day.


This item fits the following BMWs:
1993-1995 E34 BMW 530i 540i
1988-1994 E32 BMW 740i 740il
1995-2001 E38 BMW 740i 740il
1990-1999 E31 BMW 840i 840ci

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