BMW 528I 1996–1997 — technical service bulletin
Bulletin 65 04 98 · NHTSA communication 600879 · issued Mar 1, 1998
Technical service bulletin
communication type
Electrical System
component
1996–1997
model years
6
vehicle entries
Official summary
Condition with dsp amplifier drains battery.*yc
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.