Mine goes off after approximately twenty minutes. It also goes off on my E60 after approx. twenty minutes also. Wagner, I may be wrong but I don't think that its normal for that light to be constantly on.

Cheers

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-2006 E53 (X5 4.4) Titanium Silver, fully optioned (sports package, premium package, navigation, ride height adjustment, panorama moon roof, rear climate package). Aero kit installed plus set of staggered 20s with Diamaris tyres.