BMW Thermostats for BMW 5 Series E39 (1996-2003)

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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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Thermostat Replacement Kit - E39 540i 1996-1998
Thermostat Replacement Kit - E39 540i 1996-1998
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:554083
Part#: 11531437526KT2
Ships in 2 Business Days
Sale - Save 2% $ 189.99

This product was last offered at the strikethrough price on
05-29-2026

$ 186.20 USD
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Sale - Save 2%
$ 189.99

This product was last offered at the strikethrough price on
05-29-2026

$ 186.20 USD
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When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

  • Behr thermostat with O-ring
  • Thermostat mounting hardware
  • 1 Gallon BMW coolant

 

This item fits the following BMWs: 

1997-1998  E39 BMW  540i

 

 

When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

  • Behr thermostat with O-ring
  • Thermostat mounting hardware
  • 1 Gallon BMW coolant
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Thermostat Replacement Kit - E39 540i 1999-2003
Thermostat Replacement Kit - E39 540i 1999-2003
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:554085
Part#: 11531436386KT3
In Stock
Sale - Save 24% $ 119.99

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

$ 91.11 USD
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Sale - Save 24%
$ 119.99

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

$ 91.11 USD
Free Shipping
Add to Wish List

When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

  • Rein thermostat
  • Thermostat mounting hardware
  • 1 liter of coolant

 

This item fits the following BMWs: 
1999-2003  E39 BMW  540i 
 

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Bav Auto Thermostat With Aluminum Housing - M52TU M54
Bav Auto Thermostat With Aluminum Housing - M52TU M54
For vehicles with production date from 09/1998
10X Entries Into Our F80 M3 Sweepstakes
Bavarian Autosport - Corporate Logo
T#:12544802
Part#: 11531437040
In Stock
Sale - Save 19% $ 104.99

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

$ 84.99 USD
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Sale - Save 19%
$ 104.99

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

$ 84.99 USD
Free Shipping on orders $49 and up
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The plastic thermostat cover in your BMW is a known point of failure. Throughout 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
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Thermostat With Housing - 90C
Thermostat With Housing - 90C
For vehicles with a production date from 09/1998
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:598978
Part#: 11531436386
In Stock
Sale - Save 20% $ 93.99

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

$ 75.06 USD
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Sale - Save 20%
$ 93.99

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

$ 75.06 USD
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A thermostat that opens sooner promotes better cooling in your vehicle. Running a lower temperature thermostat will keep everything much cooler. Keeping the engine cooler will help reduce and improve the life of the seals in your engine, saving you time and money, while also help increase engine performance. A tune might be required to gain the most from this modification, as well as to get your car's ECU accustomed to seeing lower temperatures.
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Thermostat With Housing
Thermostat With Housing
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:26494584
Part#: 11537509227
In Stock
Sale - Save 25% $ 60.99

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

$ 45.99 USD
Free Shipping on orders $49 and up
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Sale - Save 25%
$ 60.99

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

$ 45.99 USD
Free Shipping on orders $49 and up
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Thermostat With Housing - 105C
Thermostat With Housing - 105C
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:15511816
Part#: 11531436386
Ships in 9 Business Days
Sale - Save 4% $ 30.99

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

$ 29.67 USD
Free Shipping on orders $49 and up
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Sale - Save 4%
$ 30.99

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

$ 29.67 USD
Free Shipping on orders $49 and up
Add to Wish List
A thermostat that opens sooner promotes better cooling in your vehicle. Running a lower temperature thermostat will keep everything much cooler. Keeping the engine cooler will help reduce and improve the life of the seals in your engine, saving you time and money, while also help increase engine performance. A tune might be required to gain the most from this modification, as well as to get your car's ECU accustomed to seeing lower temperatures.
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