Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 BMW 323is AutomaticFACTORY OEM SERVICE PROCEDURE
Torque Specifications
ALTERNATOR WITH DRIVE AND MOUNTING PARTS
| Type | Thread | Measure | ||
| 1AZ | Wires to alternator | |||
| Terminal D+ | M10 / M20 | 5 Nm | ||
| All / others | M6 | 7 Nm | ||
| Terminal B+ | S38 / B38 | 8 Nm | ||
| All / others | M8 | 13 Nm | ||
| 2AZ | Pulley | All | 45 Nm | |
| 3AZ | Pulley (ribbed drive belt) | Alternator with cooling jacket | 80 Nm | |
| all others | 70 Nm | |||
| N42, N46 Valeo | 75 Nm | |||
| N42, N46 Bosch | 65 Nm | |||
| 4AZ | Rear holder | All | 3.5 Nm | |
| 5AZ | Fillister head screw for wire holder | All | 3.5 Nm | |
| 6AZ | Alternator on bearing block | M40/M42 / M43 / M44 | 43 Nm | |
| 7AZ | Alternator to crankcase | N42, N46, N62 | M8 | 21 Nm |
| 8AZ | Belt pulley (ribbed V-belt) with freewheel (Ina) fitted to Bosch and Valeo alternators | N42, N43 | 80 Nm | |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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