Quote:
Originally Posted by FatRear08
I just had my expansion tank replaced last week as it developed hairline cracks in 3 places on the upper half as well as seepage around the middle seam. Same problem on my former F80. Why there are 2 pieces fused together is beyond me.
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I suspect my M550 upper tank is leaking, 2020. The dealership keeps telling me they pressure checked system and is OK. But i've had 2 low coolant warnings in less than 4 months, 1.000 miles. That is not OK with me.