BMW X5: Replacing Exhaust Camshaft Pulse Generator (N52, N52K, N51, N53)

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection).

Necessary preliminary tasks:

• Read out fault memory of DME control unit; if necessary, work through test schedules
• If necessary, remove radiator cover

Unlock plug (1) and remove. Release bolt.

Release bolt.

Fig. 18: Locating Ignition Coil Covers Screws And Holder

Installation:

Fig. 19: Identifying Plug Connector

Replace screw.

Tightening torque 12 14 4AZ.

Remove pulse generator (2).

Fig. 20: Locating Pulse Generator

NOTE: Check stored fault messages.

Now clear the fault memory.

REPLACING PULSE GENERATOR ON EXHAUST CAMSHAFT (N52K)

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection).

Necessary preliminary tasks:

• Read out fault memory of DME control unit.
• Switch off ignition

Lever out expansion rivets (1).

Press lock (2) and raise intake duct (3).

Detach intake duct (3) from air filter housing and remove.

Fig. 21: Locating Ignition Coil Covers Screws And Holder

Installation:

Fig. 22: Identifying Plug Connector

Replace screw.

Tightening torque 12 14 4AZ.

Remove pulse generator (2).

Fig. 23: Locating Pulse Generator

NOTE: Check stored fault messages.

Now clear the fault memory.

REPLACING CONTROL UNIT (DME)

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection).

Necessary preliminary tasks:

• Switch off ignition.
• Disconnect battery negative lead.
• Remove microfilter housing.

IMPORTANT: Follow instructions for removing and installing electronic control units.

Replacement:

• Carry out programming/coding.

IMPORTANT: It is absolutely essential to read out the fault memory with the MoDiC or the BMW DIS and to create a fault memory printout.

Switch off ignition.

Lever out expander rivet.

Remove gasket (1).

Release screws (2).

Feed out partition (3) and remove.

Fig. 24: Identifying Expander Rivet Gasket And Screws

Lever out expander rivet.

Release locks in direction of arrow.

Feed out fresh air duct (1) and remove.

Fig. 25: Removing Fresh Air Duct

Open retainers.

Release lock (1) in direction of arrow.

Remove cover (2).

Fig. 26: Locating Retainers Lock And Cover

Release screws and remove retaining bar (1).

Unlock upper section (2) of partition seal in direction of arrow and remove.

Release grommets (3) for wiring harnesses from lower section of partition seal and from electronics box.

Installation:

Make sure grommets are correctly seated (watertightness).

Fig. 27: Unlocking Upper Section Of Partition Seal

Unlock plugs (1) using slide in direction of arrow and remove. Remove control unit (2).

Installation:

Replacement: Note device identification number and coding.

Fig. 28: Identifying DME Control Unit

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

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