Coolant Temperature Sensor. We are an authorised distributor for Lemark parts. Equivalent to Part Numbers: BMW: 1710535, 12621710535, 12621747281 Beru: ST…. If you order before 12PM we'll dispatch same day from our UK warehouse. For guaranteed next day delivery please select this option at checkout. This product comes with free 365-day no quibble returns (UK only).