17 21 020 Removing and installing/replacing transmission oil cooler (DKG) (N54)

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Danger of scalding!

Only perform this work after engine has cooled down.

Necessary preliminary tasks

Drain COOLANT
Remove UNDERBODY PROTECTION

Recycling

Catch and dispose of drained coolant in a suitable container.

Transmission fluid emerges when fluid lines are detached from transmission fluid cooler.

Catch and dispose of escaping transmission fluid in a suitable container.

Observe country-specific waste-disposal regulations.

Release and disconnect coolant hoses (1).

Unlock transmission fluid lines (2) and detach.

Release screw (3).

Tightening torque 17 10 6AZ .

Remove transmission fluid cooler (4).

Fig 1: Identifying Coolant Hoses And Transmission Fluid Lines With Heat Exchanger

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Assemble engine.

CHECKING OIL LEVEL in twin clutch gearbox. If necessary, fill with transmission oil.