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Home >> BMW >> 2013 >> Z4 28i, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 23 (Engine Electrical System - Repair (N54)) >> 1214 Electronic Switching Or Control Units >> 12 14 521 Replacing crankshaft pulse generator (N54)

12 14 521 Replacing crankshaft pulse generator (N54)

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: Read and comply with notes on ESD PROTECTION (ELECTRO STATIC DISCHARGE) .
IMPORTANT: Aluminum screws/bolts must be replaced each time they are released. 

Aluminum screws/bolts are permitted with and without color coding (blue).

For reliable identification:

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

Necessary preliminary tasks 

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

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

Release screw.

Installation: 

Replace aluminum screws. 

Tightening torque 13 62 4AZ .

Fig 1: Locating Crankshaft Pulse Generator With Plug
G04751285Courtesy of BMW OF NORTH AMERICA, INC.

Withdraw pulse generator (2) from crankcase.

Installation: 

Replace sealing ring.

NOTE: Check stored fault messages.
Now clear the fault memory.