Oil Thermostat for BMW N54/N55/S55

The Mosselman Oil Thermostat offers advanced temperature control for BMW N54, N55, and S55 engines, addressing common oil cooling issues. Unlike the stock thermostat which opens at 105°C (220°F), this unit activates at 85°C (185°F), leading to operational oil temperatures up to 20°C (68°F) lower than OEM specifications. This enhanced cooling capability ensures more stable performance and significantly improves engine reliability, making it a highly recommended upgrade for these BMW powerplants, particularly when tuned. Constructed from a solid block of high-grade aluminum, the Mosselman Oil Thermostat features a CNC-machined housing and a genuine thermostat, ensuring effective operation in both hot and cold climates. It is designed as a plug-and-play component, with an installation time of approximately 30 minutes. While it ensures oil reaches operating temperature at the same rate as a stock thermostat, its primary benefit lies in maintaining a cooler and more consistent oil temperature range during spirited driving, which is crucial for sustained performance and engine longevity. For more extreme applications, Mosselman also offers dedicated oil cooler kits. **Important Considerations:** * This product is specifically designed for BMW N54, N55, and S55 engines. * Hardware and gasket kits are sold separately (Hardware Kit: T#27338727, Gasket Kit: T#4799665).