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Home >> BMW >> 2021 >> 430i xDrive >> Repair and Diagnosis >> Electrical >> Gauges >> Engine Electrical System -- Repair (G22, G23 & G26) (1 Of 2) >> 12 31 Alternator >> 12 31 020 Removing and installing/replacing alternator (M440i and M440i xDrive coupe/convertible/Gran Coupe sedan) >> When replacing the alternator: Remounting the belt tensioner of the alternator

When replacing the alternator: Remounting the belt tensioner of the alternator

TIGHTENING TORQUE SPECIFICATION

Belt tensioner to alternator/starter motor generator
M8X30 Tightening torque  28 Nm
G12701016Courtesy of BMW OF NORTH AMERICA, INC.