Necessary preliminary tasks

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 BMW 328xi, 2012 BMW 328i, 2011 BMW 328xi, 2011 BMW 328i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Read out fault memory of DME control unit
Switch off ignition
Disconnect BATTERY NEGATIVE LEAD
Remove ignition coil cover See REMOVING AND INSTALLING/REPLACING ACOUSTIC COVER (N52/N52K) or REMOVING AND INSTALLING/REPLACING IGNITION COIL COVER (N52K)
Remove intake duct

Fig 1: Identifying Intake Hose, Duct, Mounting Screws And Removal Direction
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Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 2: Unlocking Locks

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Unlock plug (1) and remove.

Unlock control unit (2) and raise approx. 5 cm.

Release grommet (3) from electronics box.

Installation:

Make sure grommet (3) is correctly seated in electronics box (watertightness).

Fig 3: Identifying Plug, Control Unit And Grommet

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Unlock tab (1). Pull contact carrier (2) in direction of arrow out of housing.

Unlock and disconnect all plug connections of ignition coil wiring harness section in electronics box.

Fig 4: Pulling Contact Carrier

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Press locking tabs (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 5: Pressing Locking Tab

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Press locking tab (1) in direction of arrow and pull contact carrier (2) out of housing.

Fig 6: Pressing Locking Tab

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WORK STEP REFERENCE CHART

Work step	Note:
Disconnect positive lead from battery positive terminal
Disconnect ground cables
Unlock plug connections on ignition coils and disconnect
Unlock cable duct on cylinder head cover and detach
Unlock plug on eccentric shaft sensor and disconnect
Unlock plug on positioning motor for eccentric shaft and disconnect
Unlock plug on both solenoid valves and disconnect
Unlock plug on inlet and exhaust camshaft sensors and disconnect
Unlock plug on air-conditioning compressor and disconnect
Unlock plug on oil pressure switch and disconnect
Unlock plug on coolant temperature sensor and disconnect
Disconnect connector strip from fuel rail
Remove front UNDERBODY PROTECTION
Unlock plug on electric coolant pump and disconnect
Unlock plug on coolant thermostat and disconnect
Disconnect engine ground connection	Tightening torque 12 52 3AZ .
	Replace screw.

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