I have had a few issues with my fuel gauge - had both sending units and fuel pump replaced a few years ago. Ended up in an accident (got rear-ended) and then my fuel gauge would stop at a half-tank. One of the new sending units was repalced under warranty and everything seemed to be working fine until I took my first road trip. ONLY when I take a long trip to where the fuel level goes to a half tank it will stop there, even if I turn it off and back on. Seems to reset itself once a refuel. Day-to-day driving it works just fine.

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2001 X5 3.0i (PP/WP/AP) Traded at 213K miles
RARE White on Black - Why does everyone get Tan??
First E53 with 215s on XOutpost!!