The N54, N55 and S55 engines are no strangers to oil cooling problems, that’s why we recommend installing the MSL Oil Thermostat. The standard oil thermostat will reach around 120 degrees Celsius with a normal driving style. The MSL Oil Thermostat will open at a lower temperature than the standard oil thermostat (at 85 degrees Celsius) and will keep the temperature stable between 95 and 105 degrees Celsius, depending on the car model.

Installing the MSL thermostat ensures a cooler oil temperature which will result in more stable performance, but above all this improves the reliability of the engine. It is highly recommended to install the thermostat, especially for cars that are tuned.

The N54 engine is no stranger to oil cooling problems, that’s why we recommend installing the MSL Oil Thermostat. The standard oil thermostat will reach around 120 degrees Celsius with a normal driving style. The MSL Oil Thermostat will open at a lower temperature than the standard oil thermostat (at 85 degrees Celsius) and will keep the temperature stable between 95 and 105 degrees Celsius, depending on the car model. Installing the MSL thermostat ensures a cooler oil temperature which will result in more stable performance, but above all this improves the reliability of the engine. It is recommended to install the thermostat, especially for cars that are tuned.

The Thermostat is plug-and-play and made out of a solid block of high-grade aluminum at our own facility. It is equipped with a real thermostat, not an always open solution. The oil will still reach the operating temperature at the same time as a stock thermostat.

We highly recommend purchasing the MSL Installation Kit & the MSL Titanium GR5 Hex-Race Bolt Set with this MSL Oil Thermostat as they are not included in this listing. 

Note: 

• The Oil Thermostat Installation kit prevents the Oil Thermostat from leaking and is highly recommended when installing the MSL Oil Thermostat. The kit includes 2 x O-ring for the oil hose and 1x rubber oil filter housing gasket. We advise to add it to your order. 
• When installing this thermostat, you will need to have an oil change done at the same time. 

• 20°C Lower Than Stock
• Operating temperature 20°C lower than stock.
• Real Thermostat
• Equipped with a real thermostat, not an always open solution. (for use in hot and cold climates)
• Rock Solid Housing
• Made out of a solid block of high-grade aluminum.
• Quick Installation
• Takes only 30 minutes to install.

• 1 x Mosselman N54 Oil Thermostat

 MSL Titanium GR5 Hex-Race Bolt Set Includes

• 3 x M8x25 Bolts 

• BMW 135i/is E82 N54
• BMW 135i E82 N55
• This is an N55 engine, but it needs the N54 thermostat to make it fit into the car!
• BMW 1M E82 N54
• BMW 335i E90/E91/E92/E93 N54
• BMW 335i E90/E91/E92/E93 N55
• This is an N55 engine, but it needs the N54 thermostat to make it fit into the car!
• BMW Z4 35i E89 N54
• BMW Z4 LCI 35i E89 N54
• BMW Z4 35is E89 N54

To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number or the last 7 digits of your VIN. Simply enter your car details prior to checkout.

OTN54.T85

Manufactured by

Mosselman