Ensure your BMW X5 (2016-2018) operates at peak efficiency with this genuine OEM thermostat. Positioned within the engine's cooling system, this essential part regulates the flow of coolant, maintaining optimal engine temperatures for enhanced performance and fuel efficiency. The original part number, 7646665, guarantees a perfect fit and function, ensuring you avoid common issues such as overheating or erratic temperature readings caused by a malfunctioning or worn-out thermostat. Trust this factory-original part to resolve potential engine cooling complications, preserving the reliability and longevity of your vehicle’s performance. Compatible with the 3.0L I6 engine in your BMW X5, this thermostat is an excellent choice for proper maintenance.