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

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 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 gasoline 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 HOUSINGM3

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

Unlock locks (2) in direction of arrow.

Remove cover (3).

Fig 1: Opening 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: Releasing Lugs (Diesel Engine Vehicles)

Courtesy of BMW OF NORTH AMERICA, INC.

Gasoline 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: Releasing Lugs (Gasoline Engine Vehicles)

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: Releasing Tabs

Courtesy of BMW OF NORTH AMERICA, INC.