BMW 8 Series 2018–2019 — technical service bulletin
Bulletin B090318 · NHTSA communication 10152656 · issued Nov 1, 2018
Technical service bulletin
communication type
Equipment
component
2018–2019
model years
2
vehicle entries
Official summary
RAM CONTROL UNIT: CANNOT BE ENCODED / NO SOUND OUTPUT. After programming the RAM (audio amplifier) one of the following errors may occur: 1. Coding of the RAM-01 audio amplifier fails repeatedly. 2. The RAM-01 audio amplifier was successfully programmed and encoded with ISTA. However after the vehicle goes to sleep, the sound output no longer works. The root cause for this error is still under investigation.
Vehicles covered
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.