BMW owners, if you're seeing coolant issues with your X5 or X6, this BEHR Coolant Reservoir with Level Sensor is exactly what you need! This brand new replacement tank fits BMW E70 and E71 models including 2007-2014 X5 and 2008-2014 X6 vehicles with various engine options. The part number is 17 13 7 552 546, but definitely double-check your specific vehicle compatibility using the Amazon fitment filter to be sure. BEHR is a well-respected OEM supplier, so you're getting quality that matches original equipment standards. The tank comes with the integrated level sensor already installed, making replacement straightforward. Since it's recently manufactured rather than old stock, you don't have to worry about plastic degradation from sitting on shelves for years. Installation is typically pretty straightforward if you're handy with basic tools - just make sure the engine is cool and you have a drain pan ready. This comes with a full 1-year warranty for peace of mind. If your coolant reservoir is cracked, leaking, or the level sensor isn't working properly, replacing it with this BEHR unit will solve those issues and prevent potential overheating problems down the road. The quality is solid, the fit is precise, and having a properly functioning coolant system is crucial for keeping your BMW running smoothly. Whether you're doing the repair yourself or having a shop handle it, this BEHR coolant reservoir is a reliable replacement that won't let you down!