64 12 535 Removing and installing / replacing burner insert (Thermo Top S)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 BMW 540i, 2002 BMW 540i, 2001 BMW 540i, 2000 BMW 540i, and 1999 BMW 540i. However, it is still accessible from the selected car via links, so may be relevant.

Remove retaining plate with glow element and flame detector. See 64 12 505 Removing And Installing / Replacing Glow Element (Thermo Top S) .

Unscrew grub screw (1) until air duct (2) and burner support bracket (3) can be pulled out of the heater together with the burner insert.

Fig 1: Releasing Grub Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Lightly lever out tabs (5) with screwdriver. Pull apart burner support bracket and burner insert.

Grub screw
Air duct
Burner bracket
Burner insert
Tabs
Guide for glow element
Guide for flame detector

Fig 2: Identifying Burner Support Bracket And Burner Insert Components
Courtesy of BMW OF NORTH AMERICA, INC.