61 42... Removing And Installing/Replacing DC/DC Converter

WARNING: This page is about a different car, the 2013 BMW M3, 2012 BMW M3, and 2011 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

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 Locks

Courtesy 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 (Diesel Engine)

Courtesy 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 (Petrol Engine)

Courtesy 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 Connections

Courtesy of BMW OF NORTH AMERICA, INC.