12 14 521 Replacing crankshaft pulse generator (N52, N52K, N51, N53)

WARNING: This page is about a different car, the 2010 BMW X3, 2009 BMW X3, 2008 BMW X3, and 2007 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Read and comply with .61 35 ... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE)

IMPORTANT: Aluminium-magnesium materials.

No 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.

The end faces of aluminium screws/bolts are painted blue for the purposes of reliable identification.

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

Necessary preliminary tasks:

Read out fault memory of DME control unit
Switch off ignition

NOTE: Installation location of pulse generator for crankshaft is underneath starter motor.

Preparatory tasks:

Remove INTAKE MANIFOLD

Detach plug (1) from crankshaft pulse generator (2).

Release screw.

Installation:

Replace aluminium screws.

For tightening torque refer to 12 14 2AZ in 12 14 ELECTRONIC SHIFT UNITS OR CONTROL UNITS .

Withdraw pulse generator (2) from crankcase.

Installation:

Replace sealing ring.

Fig 1: Identifying Plug, Screw And Crankshaft Pulse Generator

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check stored fault messages.

Now clear the fault memory.