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Home >> BMW >> 2012 >> M3 2D Convertible, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Memory Modules >> General Electrical System - Repair -- M3 Convertible >> Switches, Horn, Small Devices >> 61 42... Removing and installing/replacing DC/DC converter

61 42... Removing and installing/replacing DC/DC converter

NOTE: DC/DC converter in vehicles with automatic start-stop function.
There are two versions:
  • Without additional bracket for diesel engine vehicles
  • With additional bracket for petrol engine vehicles

Depending on the equipment, one or both versions are installed in the M3
IMPORTANT: Read and comply with INFORMATION ON PROTECTION AGAINST DAMAGE FROM ELECTROSTATIC DISCHARGE .

Necessary preliminary work:

Remove LOWER SECTION OF MICROFILTER HOUSING (all except M3)

Remove RIGHT UPPER SECTION OF MICROFILTER HOUSING M3

Unlock fasteners (1) from below and slide upwards approx. 10 mm.

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 1: Removing Cover
G09895839Courtesy of BMW OF NORTH AMERICA, INC.

Diesel engine vehicles (without additional bracket): 

Release lugs in direction of arrow.

Remove DC/DC converter (1) by pulling upward. Disconnect plug connection (2).

Fig 2: Removing DC/DC Converter - Without Additional Bracket (Diesel Engine Vehicles)
G09895840Courtesy of BMW OF NORTH AMERICA, INC.

Petrol engine vehicles (with additional bracket): 

Release lugs in direction of arrow.

Remove DC/DC converter (1) by pulling upward. Disconnect plug connection (2).

Fig 3: Removing DC/DC Converter - With Additional Bracket (Petrol Engine Vehicles)
G09895841Courtesy of BMW OF NORTH AMERICA, INC.

M3: 

Release tabs in direction of arrow and remove DC/DC converter with additional bracket (1) upward. Disconnect plug connection (2).

Release tabs in direction of arrow and remove DC/DC converter without additional bracket (3) upward. Disconnect plug connection (4).

IMPORTANT: Do not mix up plug connections (2, 4)!
Fig 4: Disconnecting Plug Connection
G09895842Courtesy of BMW OF NORTH AMERICA, INC.
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