How to remove and install the thermostat in the engine cooling system on BMW 335i?

Take off splasher shield located under the engine and also drain the cooling system. Above the engine coolant pump, both the hose clamps should be unscrewed to let the hoses detach. Open the fasteners and take off the hoses, and thereafter, remove the electrical connection. Bolt and thermostat should then be removed by the user. For installation what is required is a reversal of the removal process with the addition of refilling and bleeding of the cooling system, and a check for any traces of leaks.

Genuine BMW 335i Thermostat

Engine Coolant Thermostat

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4 Thermostats found

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BMW 335i Thermostat
Part Number: 11537549476
$216.45 MSRP: $316.79
You Save: $100.34 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat Housing, Thermostat Unit
- Replaces: 11-53-7-544-788, 11-53-7-536-655
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2007-2010 BMW 335i | Convertible(E93), Coupe(E92), Sedan(E90)
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BMW 335i Engine Coolant Thermostat
Part Number: 11532394968
$133.20 MSRP: $194.95
You Save: $61.75 (32%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Thermostat
- Replaced by: 11537598865
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2012-2015 BMW 335i | Sedan(F30)
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BMW 335i Engine Thermostat
Part Number: 11537601158
$222.34 MSRP: $325.41
You Save: $103.07 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat; Thermostat Housing, Thermostat Unit
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2011-2013 BMW 335i | Convertible(E93), Coupe(E92), Sedan(E90)
View related parts
BMW 335i Engine Coolant Thermostat
Part Number: 11537598865
Product Specifications
- Other Name: Thermostat; Thermostat Unit
- Replaces: 11-53-2-394-968
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2012-2015 BMW 335i | Sedan(F30)

BMW 335i Thermostat

The Thermostat of your BMW 335i controls the heat of your engine. It opens at a certain temperature. When it does, the hot coolant from the larger circuit can flow into your engine. This prevents your engine from overheating. Every BMW 335i has a Thermostat designed to sit close to the radiator where it senses water temperature in the inner loop. The Thermostat will wait until the temperature rises sufficiently for safe circulation. It's a simple action and ensures that the car's aluminum block operates within ideal performance parameters. Similarly, it prevents expensive damage that can potentially occur if the block is allowed to overheat. The early models of the BMW 335i applied a purely mechanical wax pellet Thermostat that expands when heated and operates a valve, while later cars still use the same wax principle but pair it with an electric heater. This allows for much faster response under high load, with the added benefit of quicker warm-up of the engine and tighter emissions control on BMW vehicles. If this Thermostat is stuck closed, coolant flow will cease and head temperatures will rise. Therefore, it is essential to choose the right Thermostat and replace it if faulty. With regular attention and care, this small component can help every BMW 335i keep cool during long drives, spirited accelerations, and everyday commutes in all weather.

If you are looking for OEM BMW 335i Thermostat, we highly recommend to shop with us. Not only do we offer budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW 335i Thermostat that come backed by the manufacturer's warranty.

BMW 335i Thermostat Parts Questions & Experts Answers

Thermostat
11537549476
Q:
How to remove and install the thermostat in the engine cooling system on BMW 335i?
Posted by Clay J.
A:
Take off splasher shield located under the engine and also drain the cooling system. Above the engine coolant pump, both the hose clamps should be unscrewed to let the hoses detach. Open the fasteners and take off the hoses, and thereafter, remove the electrical connection. Bolt and thermostat should then be removed by the user. For installation what is required is a reversal of the removal process with the addition of refilling and bleeding of the cooling system, and a check for any traces of leaks.
Answered by BMW Parts Specialist Brad / Apr 16, 2026