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The B58 engine on your X5/X6/X7 has 2 separate coolant reservoir tanks. This is the larger of the 2 bottles, which holds antifreeze-coolant for the engine main cooling system on G05 X5 40i (2019+), G06 X6 40i (2019+), G07 X7 40i (2018+), and G09 XM 50e (2024+). This part is listed by BMW as BMW part number 17135A6A031 (17-13-5-A6A-031) and is described as Genuine BMW Coolant Reservoir Tank, B58C/B58N/B58X. Cap sold separately. Please see below for BimmerWorld recommended related items.
BMW Fitments:
X5 Series
G05 X5 (2019+) > X5 xDrive40i B58C (2019-2023)
X6 Series
G06 X6 (2020+) > X6 sDrive 40i B58C (2020-2023)
G06 X6 (2020+) > X6 xDrive 40i B58C (2020-2023)
X7 Series
G07 X7 (2019+) > X7 xDrive40i B58C (2019-2022)
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$163.38
Engine Coolant Expansion Tank, BMW - G05 X5 G06 X6 G07 X7 40i
Original BMW coolant reservoir tank for the main cooling system on B58-powered X5/X6/X7 models.
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