BMW 540I 1998 — technical service bulletin
Bulletin 121999 · NHTSA communication 606694 · issued Jun 1, 1999
Technical service bulletin
communication type
Electrical System
component
1998
model years
5
vehicle entries
Official summary
Information on programming me7.2 engine control modules with cd 18. *tt
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.