General description The Coolant Overflow Expansion Tank is designed for BMW E70 and E71 models, specifically for X5 and X6 vehicles manufactured between 2007 and 2018. This essential component helps maintain optimal coolant levels and prevents overflow, ensuring efficient engine performance. Technical specifications Part Number: 17138621092, 17137647290, 17137552546 Interchange Part Numbers: 17 13 5 552 546, 17 13 7 647 290, 17 13 8 621 092 Color: Black Material: Plastic Measurement allowed error: +/- 1-3 cm Compatibility and accessories Fits BMW X5 models from 2007 to 2018 Compatible with X6 models from 2007 to 2018 Applicable for various trims including 3.0SI, 4.8I, XDRIVE30I, XDRIVE35D, XDRIVE40E, and XDRIVE40I Other information Package Contents: 1 x Coolant Overflow Bottle Expansion Tank with Sensor Note: Light reflection and different displays may cause the color of the item to differ slightly from the actual product.