Service bulletin B651016
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10151199 |
| Published by NHTSA | 2018-12-10 |
| Manufacturer's number | B651016 |
| Manufacturer's date | 2016-03-01 |
| NHTSA component | EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC. |
NHTSA's summary
Sporadic Failure of Different Audio Channels. Intermittently, different speakers may be inoperative during an entire drive cycle until the vehicle enters sleep mode and the vehicle is restarted. Shut-down of output circuit(s) from pressure variations caused by door shutting during diagnostic self-test. After unlocking the vehicle the Harman Kardon (HK) Amplifier goes into a speaker self-test mode. If a door is slammed during this self-test vibrating the speaker cone, the HK amplifier may interpret the changing resistance of the speaker as a circuit failure. The HK Amplifier will then go into protection mode and turn off the output transistor(s) for the particular speaker(s) until the next selftest which is performed after the next sleep cycle.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Equipment and accessories
| BMW 228I | 2014, 2015, 2016 |
|---|---|
| BMW 230I | 2017 |
| BMW M235I | 2014, 2015, 2016 |
| BMW M240I | 2017 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
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