Product Description: Precision Engine Coolant Thermostat for BMW Models Optimize Your Vehicles Cooling System with Our High-Performance Engine Thermostat Fitment: This engine coolant thermostat is designed as a perfect replacement for the following BMW models: 1 Series E81 118i 120i N46N (09/2006 12/2011) 3 Series E46 316i 316ti 318Ci 318i 318ti N46 N42 (03/2000 08/2006) 5 Series E60 LCI 520i N46N (04/2006 12/2009) X1 E84 18i N46N (09/2008 06/2015) Verify compatibility with your specific model to ensure optimal performance and fit. OE Number: The reference part numbers for this engine coolant thermostat include 11537510959, 11 53 7 510 959, 11517500597, and 11 51 7 500 597. Please check these numbers against your existing part to ensure correct fitment. Practical Function: The primary function of this thermostat is to regulate the heat dissipation capacity of the cooling system, ensuring that the engine operates within an optimal temperature range. This enhances engine performance and longevity by preventing overheating. Main Advantage: Featuring high sensitivity and precision, this thermostat effectively controls engine temperature, providing reliable performance in various driving conditions. Its precise temperature regulation ensures efficient engine operation. Fine Workmanship: Professionally manufactured with exquisite craftsmanship and a unique design, this thermostat guarantees stable performance and high reliability. Its quality construction ensures durability and long-lasting functionality. Upgrade your BMWs cooling system with this precision-engineered engine coolant thermostat. Combining advanced features, high-quality materials, and easy installation, it is an essential component for maintaining and enhancing your vehicles engine performance.