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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Mahle - Corporate Logo
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
Free Shipping on orders $49 and up
$ 61.49 USD
Free Shipping on orders $49 and up
Includes sealing o-ring
Rein Thermostat - 88�C - E30, E34, E36, Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591800
Part#: 11537511580
In Stock at Vendor
$ 37.99 USD
Free Shipping on orders $49 and up
Common point of failure in the cooling system.
Mahle - Corporate Logo
T#:12476
Part#: 11537511083
Ships in 8 Business Days
$ 29.99

This product was last offered at the strikethrough price on
05-22-2026

$ 27.65 USD
Free Shipping on orders $49 and up
$ 27.65 USD
Free Shipping on orders $49 and up
OEM BMW THERMOSTAT:115040

Mahle - Corporate Logo
T#:594727
Part#: 11531713040
Ships on Sep 16, 2026
$ 35.99 USD
Free Shipping on orders $49 and up
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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Rein - Corporate Logo
T#:591144
Part#: 11531265084
In Stock at Vendor
$ 2.05 USD
Free Shipping on orders $49 and up
This O-ring seals the thermostat to the cylinder head.
Rein Thermostat 80C - E30 325e, E28 535i, E24 633CSi
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:34114243
Part#: 11531710953
In Stock
$ 19.99 USD
Free Shipping on orders $49 and up

Thermostat 80C is a crucial component for controlling the temperature in BMW engines, ensuring optimal performance and protection. Designed to open at 80°C, this thermostat helps your engine reach its ideal operating temperature quickly while preventing overheating. Engineered specifically for BMW vehicles, the Thermostat 80C ensures precise temperature regulation, enhancing both engine efficiency and longevity. Available at Turner Motorsport, this direct-fit replacement offers easy installation and reliable performance.

  • Designed for BMW engines for a perfect fit
  • Opens at 80°C to regulate coolant flow and maintain optimal temperature
  • Prevents overheating and improves engine efficiency
  • Manufactured from high-quality, durable materials for long-lasting use
  • Direct-fit replacement ensures hassle-free installation
  • Enhances overall engine performance and longevity

The Thermostat 80C from Turner Motorsport is the perfect choice for BMW owners looking to maintain optimal engine temperature, ensuring smooth operation and extending the life of their vehicle.

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