07-21-2017, 04:09 PM | #1 |
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Seatbelt warning light comes on randomly.
Hey everyone. About a month ago my seatbelt warning light started coming on in my 2014 m235i seemingly at random. After a few times I pulled over and pulled out my phone to try to take a video I could show to the service tech, and when I turned the phone on the light stopped. I thought it was random bad luck and finished my drive in to work. The next morning the same thing happened. As soon as I unlocked my phone the alarm stopped. I experimented with this several more times and concluded that if I unlocked the phone, the alarm would go away. This only seemed to happen if I had there phone connected to charge via USB. I chalked this up to a weird bug that I'll address the next time I go in for service, then today the arm went off and I had to pull over and stop to get it silenced.
I have checked the seatbelt buckle and emergency stop and they appear to be working fine, so I'm not concerned for my safety, but the alarm is annoying as hell. Has anyone else experienced this? If it matters I have a Google Nexus 5x phone. Last edited by pounc007; 07-21-2017 at 08:45 PM.. |
07-21-2017, 08:17 PM | #3 |
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That happens if you have your phone in the passenger seat
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07-21-2017, 08:43 PM | #4 |
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I'll try to keep the phone out of the seat and see if that helps. I am pretty sure the alarm has been tripping with the phone in my lap. Is the sensor that sensitive that a phone will set it off? I've definitely left other things larger than my phone in the seat and it hasn't went off.
I'll update in a few days. |
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07-23-2017, 09:33 AM | #6 |
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08-12-2018, 07:57 PM | #7 | |
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Quote:
So maybe the phone via USB is causing this? |
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08-12-2018, 07:58 PM | #8 |
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I have read other similar reports. Apparently, the occupant sensing system reacts to the cell phone. Just place it elsewhere and issue should be gone.
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08-12-2018, 08:46 PM | #9 |
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Sounds plausible. But it only seems to react to the cellphone when it's on the passenger seat AND plugged in via USB. Just placing it on the seat doesn't seem to be enough ...
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08-13-2018, 12:56 AM | #11 |
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From the owners manual, ‘Automatic Deactivation of the Front-Seat Passenger Airbags’:
“The system reads if the front passenger seat is occupied by measuring the human body’s resistance” ....... “Do not place any electronic devices on the passenger seat if a child restraint system is to be installed on it.” |
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08-13-2018, 05:51 AM | #12 |
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