Hi thomas,

If its not the GPS antenna.

The nav computer will need to calibrate itself to the cars wheel sensors, get on a motorway and travel at a constant speed (60kph) for 10-15 minutes and this should sort it out.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.