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:_x000D_ _x000D_ 100% brand new aftermarket Coolant Expansion Bottle Cap with premium quality. _x000D_ Made of automotive grade thermoplastic, heat resistance and very durable. _x000D_ Helps to prevent the water in the fluid reservoir overflow, ensure your driving safety. _x000D_ Original standard, direct replacement for your worn or broken one. _x000D_ The replacing OE number for reference: 17107515485. _x000D_ Compatible for BMW Mini. _x000D_ _x000D_ Specifications:_x000D_ Condition: 100% brand new_x000D_ Material: plastic_x000D_ Color: black_x000D_ Replacing OE Number: 17107515485_x000D_ Diameter: 46mm / 1.8in _x000D_ Package Weight: approx.4g_x000D_ Fitment: for BMW Mini_x000D_ _x000D_ Package List:_x000D_ 1 * Coolant Expansion Bottle Cap_x000D_ _x000D_ Note:_x000D_ 1. This is a high quality aftermarket product but not genuine._x000D_ 2. Compatibility list is for your reference only. It is advisable to check the OE number before placing an order. PackageList: