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.
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HOMESERVICE MANUALSBMW2004320I (E46) (CANADA) L6-2.2L M54REPAIR AND DIAGNOSISSTARTING AND CHARGINGCHARGING SYSTEMALTERNATORSERVICE AND REPAIR
2004 BMW 320i (E46) (CANADA) L6-2.2L M54
Alternator: Service and Repair
2004 BMW 320i (E46) (CANADA) L6-2.2L M54SECTION Service and Repair
Removing And Installing Or Replacing Alternator (M52, M52TU, S50US, S52, M54)
Read out fault memories of control units. Turn off ignition.
Follow instructions for disconnecting and connecting battery.
Instructions For Disconnecting and Connecting Battery
Disconnect and cover battery negative terminal.
Remove intake filter housing.
Remove fan clutch.
Remove alternator drive belt.
Remove supply tank for power steering pump with bracket and place to one side.
NOTE: Lines on supply tank for power steering pump remain connected.
If fitted:
Disconnect air hose.
Disconnect plug connection (1).
Remove cover cap of connections.
Release nut (2) and remove battery positive lead.
Release alternator screws in succession while holding alternator firmly.
Remove alternator.
Version with tensioning roller:
Follow installation instruction.
Installation Note: Turning lock of tensioning roller must engage in alternator groove.
RENDER: 1.0x
NO RELATED
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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.