64 99... Fault 08 Burner insert
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.
Instruction:
Check exhaust pipe and muffler for soot deposits and damage and replace if necessary,
refer to 64 12 590 REMOVING AND INSTALLING OR REPLACING MUFFLER
Check intake pipe for damage and replace if necessary.
Remove burner insert,
refer to 64 12 535 REMOVING AND INSTALLING / REPLACING BURNER INSERT (THERMO TOP S)
Clean or replace burner insert and then measure CO2 content.
Specified value:
11.0 to 11.5 % CO2