Home >> BMW >> 2013 >> Alpina B7 >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Engine - Repair - F01/F02 >> 1128 V-Ribbed Belt W.Tens./Deflect >> 1128050 Replacing A/C compressor drive belt with belt tensioner (N63) >> Necessary preliminary work