12 Removing and installing engine compartment suppression lines (grounding cables) (N62/TU)

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Read out fault memory of DME control unit; if necessary, work through test schedules
Switch off ignition
battery negative lead
If necessary, remove acoustic cover

Fig 1: Identifying Acoustic Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Remove intake hose . See 13 54 250 REPLACING AIR INTAKE HOSE (BETWEEN AIR-MASS FLOW SENSOR AND THROTTLE VALVE ASSEMBLY) (N62, N62TU) .
Remove intake filter housing . See 13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING .

Release screw connection (1) of intake filter mounting.

Pull ignition coil covers (2) out of rubber grommets.

Fig 2: Identifying Ignition Coil Covers And Screw Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Release front screw connection of fuel injector wiring harness, screw down grounding strap with crimp connection again in upward direction.

Release ignition coil ground screw connection and screw other end of grounding strap to ignition coil ground again.

Installation:

Tightening torque 12 52 3AZ . See 12 52 PLUG CONNECTIONS, TERMINALS, LOOSE PARTS .

The picture shows the right cylinder bank, the procedure for the left cylinder bank is identical.

Add final details to vehicle, read out fault memory.

Fig 3: Locating Fuel Injector Wiring Harness

Courtesy of BMW OF NORTH AMERICA, INC.