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

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Read and comply with Notes On Protection Against Electrostatic Damage (ESD Protection).

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 Air Manifold

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

Release screw.

Installation:

Replace aluminium screws.

For tightening torque refer to 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.