The New Engine Oil Thermostat O-Ring #11511705408 for BMW is a high-quality replacement part made in Germany. Specifically designed for BMW vehicles, this O-ring is a genuine manufacturer part with the interchange part numbers 11511705408 and 11 51 1 705 408. Ideal for the engine compartment, this product ensures a proper seal for engine oil, providing a secure fit and optimal performance. It comes in a sealed bag, guaranteeing its authenticity and quality.