BMW X3 Service & Repair Manual: Removing/replacing knock sensors (N55)

Necessary preliminary tasks:

  • Read out the fault memory of the DME control unit.
  • Switch off ignition.
  • Remove INTAKE PLENUM .
  • Vehicles with the Bosch high pressure pump only :

Remove HIGH PRESSURE PUMP .

Unlock connector (1) and remove.

Feed out connector (1) behind feed line, remove FEED LINE if necessary.

Electrical

Release screws on both knock sensors (1) and remove knock sensors (1).

Electrical

Installation note:

Clean contact surface of knock sensors on engine block.

Electrical

NOTE: Reassemble the vehicle.

Check stored error/fault messages.

Clear diagnostic fault entries from fault memory.

    Removing/replacing knock sensors (N52T)
    IMPORTANT: Aluminum-magnesium materials. No steel screws/bolts may be used due to the threat of electrochemical corrosion. A magnesium cr ...

    Replacing (dde) control unit (N47 D20 O1)
    IMPORTANT: Read and comply with NOTES on protection against electrostatic damage (ESD protection). Necessary preliminary work: Read out t ...

    Other materials:

    BMW X3 Service & Repair Manual > Rear axle: Nut
    Nut Minimum set: Mechanical tools AM NOTE: (Nut TR20) Nut AM Nut AM NOTE: Liquidation of existing inventory and then available only as a complete tool set 33 2 120 = 83 30 0 492 179 - as of 09.12.2011 Nut Minimum set: Mechanical tools AM NOTE: (Nut M12x1.5) discontinued, can only be o ...

    BMW X3 Owners Manual

    BMW X3 Service & Repair Manual

    © 2017-2021 Copyright www.bmwx3tech.com - 0.0302