Carry out function check as described in DIS

WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.

Remove front left wheel. See 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL

Remove trim panel from front left wheelhouse. See 51 71 040 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT WHEEL ARCH COVER

Release screws (2) and turn over heater.

Fig 1: Releasing Screws & Hose Clamp

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws and remove central cover.

Fig 2: Removing Central Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Connect V adapter cable 64 1 230 between wiring harness and heater and connect to 26-pin peripherals box 61 1 459.

Reinstall heater.

Observe installation notes:

refer to 64 12 500 REMOVING AND INSTALLING / REPLACING COMPLETE HEATER (THERMO TOP S)

Fig 3: Connecting V Adapter Cable Between Wiring Harness & Heater

Courtesy of BMW OF NORTH AMERICA, INC.