Features: 1.100% brand new aftermarket Coolant Expansion Bottle Cap with premium quality 2.Made of automotive grade thermoplastic, heat resistance and very durable 3.Helps to prevent the water in the fluid reservoir overflow, ensure your driving safety 4.The replacing OE number for reference: 17107515485 5.Compatible for BMW Mini Specification: Features: 100% brand new aftermarket Coolant Expansion Bottle Cap with premium quality. Made of automotive grade thermoplastic, heat resistance and very durable. Helps to prevent the water in the fluid reservoir overflow, ensure your driving safety. Original standard, direct replacement for your worn or broken one. The replacing OE number for reference: 17107515485. Compatible for BMW Mini. Specifications: Condition: 100% brand new Material: plastic Color: black Replacing OE Number: 17107515485 Diameter: 46mm / 1.8in Package Weight: approx.4g Fitment: for BMW Mini Package List: 1 * Coolant Expansion Bottle Cap Note: 1. This is a high quality aftermarket product but not genuine. 2. Compatibility list is for your reference only. It is advisable to check the OE number before placing an order. PackageList: