17 22 010 Removing and installing/replacing heat exchanger for automatic transmission (N52K)

WARNING: This page is about a different car, the 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 oil lines are detached from heat exchanger.

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.

Fig 1: Identifying Transmission Fluid Lines With Coolant Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

Lay the coolant hose (1) to the side if necessary.

Release screw.

Tightening torque 17 10 6AZ .

Remove transmission oil cooler.

Fig 2: Identifying Coolant Hoses With Screw

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Assemble engine.
Check FLUID LEVEL in automatic transmission. If necessary, top up transmission fluid.