2009 BMW 323i AutomaticFACTORY OEM SERVICE PROCEDURE

11 00 Removing and installing/replacing acoustic cover (N52/N52K): Notes

IMPORTANT: Aluminium-magnesium materials.

NoΒ  steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminium screws/bolts exclusively.

Aluminium screws/bolts must be replaced each time they are released.Β 

Aluminium screws/bolts are permitted with and without

color coding (blue).

For reliable identification:

Aluminium screws/bolts are not magnetic.Β 

Jointing torque and angle of rotation must be observed without fail (risk of damage)Β  .

Unfasten screws (1 and 3).

If necessary, release oil cap (2) in direction of arrow.

Lift off acoustic cover (4)

Fig 1: Removing Oil Cap
G04725330Courtesy of BMW OF NORTH AMERICA, INC.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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