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  1. 7 Series - E65 / E66 (2002 - 2008)
    Hello all, I am trying to help my friend with this car he bought recently, 02 E65. Check engine light has returned. First time had smae codes, We started by replacing the thermostat and the cleard the codes and after about a week the CEL came back, same codes 279D - Output stage, Electric fan...