LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> BMW >> 2021 >> M2 Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Electrical System - Tightening Torques (F87) >> 12 42 Starter Line
April 5, 2026: LEMON Manuals is launched! Read the announcement.

12 42 Starter Line

N55 ENGINE (2016-2018): 

12 42 ALTERNATOR LEAD - TIGHTENING TORQUE SPECIFICATION

  Type Thread Tightening specifications Dimension
1AZ Alternator lead to alternator N55/N55 Hybrid M8   19 Nm
2AZ Alternator lead to starter N55/N55 Hybrid M8   13 Nm
3AZ Alternator lead to battery positive terminal N55/N55 Hybrid M8   15 Nm
M6   8 Nm

S55 ENGINE (2019-2022): 

12 42 ALTERNATOR LEAD - TIGHTENING TORQUE SPECIFICATION

  Type Thread Tightening specifications Dimension
1AZ Alternator lead to alternator S55 M8   19 Nm
2AZ Alternator lead to starter S55 M8   19 Nm
3AZ Alternator lead to battery positive terminal S55 M8   15 Nm