Description
Mosselman Oil Thermostat N55, Red
The Mosselman N55 Oil Thermostat in Red is a performance oil-temperature management upgrade for BMW N55 engines. Its thermostatic valve is designed to begin oil-cooler circulation earlier than the factory thermostat while retaining controlled warm-up. This can help reduce excessive oil temperatures during spirited driving and repeated high-load operation.
CHOOSE YOUR CONFIGURATION
Select the correct version for your vehicle. Each option opens its dedicated product page. Confirm fitment before ordering.
Key features
- Earlier oil cooler activation than the original BMW thermostat.
- Temperature-controlled oil flow, unlike a permanently open bypass.
- Precision-machined aluminium housing with red finish.
- Designed for compatible BMW N55 oil-filter-housing assemblies.
- Suitable for performance road builds and demanding driving conditions.
Specifications
| Brand | Mosselman Turbo Systems |
|---|---|
| Engine | BMW N55 |
| Finish | Red |
| Component | Oil thermostat |
| TSHK SKU | TSHK-MSL-018 |
BMW fitment
Compatible F-series BMW N55 models; confirm whether your vehicle requires the F-series N55 or E-series N54-style thermostat. Always check the exact vehicle and thermostat configuration before ordering.
Installation notes
This is a thermostat component, not a complete oil cooler kit. Inspect sealing surfaces and use appropriate replacement seals during installation. Actual oil temperature changes depend on the cooling system, ambient conditions and driving style.





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