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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Aluminum Thermostat Housing - E34, E36, Z3

10X Entries Into Our F80 M3 Sweepstakes

T#:579865

Part#: 54402

In Stock

Sale - Save 22% $ 25.99

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

$ 20.39 USD

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Qty

Sale - Save 22%

$ 25.99

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

$ 20.39 USD

Add to Wish List

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.

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Thermostat Housing

2X Entries Into Our F80 M3 Sweepstakes

T#:392721

Part#: 11531730470

Ships in 1 Business Day

$ 39.99 USD

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Qty

$ 39.99 USD

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This is a quality aftermarket replacement 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.

If you're looking for a Genuine BMW factory replacement part, Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

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Mahle-Behr Thermostat - 79Âº C - E34, E39, E52

T#:341209

Part#: 11537835558

Ships in 1 Business Day

$ 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

Thermostat Housing Cover

2X Entries Into Our F80 M3 Sweepstakes

T#:367144

Part#: 11531265059

Ships in 1 Business Day

$ 25.99 USD

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$ 25.99 USD

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Replace your old or cracked thermostat cover

Mahle-Behr Thermostat - 92C - E34, E36, E39

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

T#:594727

Part#: 11531713040

Ships on Oct 23, 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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