I have 2003 Z4 when fueling the tank will only take approximately 7 gallons (14.2 gal tank) and the fuel gauge is at one half. I've tried to put more gas in but the tank seems to be full. Any suggestions?
Optional Information: 2003 BMW Z4 3.0 Already Tried: I haven't tried anything. I'm hoping each time I get gas it will take more than a half tank. The low fuel gauge does work the warning light has come on when fuel is low.
Good morning- SOunds like one of the level sensors is not working.The design of the fuel tank is called a saddle tank.It basically has two sections that hold fuel,so it needs two sensors.When one sensor fails the gauge only sees one sensor therefore,1/2 tank,even when both sides are full.There are ways to confirm this using test steps in the instrument cluster,also removing the suspect sensor and checking the resistance.Hope this helps.