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Home >> BMW >> 2021 >> 430i xDrive >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System -- Repair (G22, G23 & G26) (1 Of 2) >> 12 31 Alternator >> 12 31 020 Removing and installing/replacing alternator (430i and 430i xDrive coupe/convertible/Gran Coupe sedan) >> Replacing the alternator

Replacing the alternator

CAUTION: Component with preload. 
Injury hazard! 
  • Reduce preload as far as possible before disassembly. Relieve component.
TIGHTENING TORQUE SPECIFICATION

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