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Old 03-13-2019, 10:04 PM
jessicarnelson jessicarnelson is offline
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Join Date: Mar 2019
Posts: 5
Mein Auto:
Active Blind Spot Malfunction


I have a 2013 335i with X Drive, M Sport. It has under 15K miles on it.

The triangles on the driver's side mirror flash every five seconds, regardless of any other cars being on the road. I work nights, so I drive to / from work while it is dark out (this time of year). I have tried turning off the the feature - and the LED light is out indicating it is off. I have tried updating the software (it says it is current). I've run the system diagnostics and it says that everything is good wit the vehicle. But it even happens while it is in park.

I don't think it is working at all. I have never seen the light activate on either side while I'm driving anywhere - with the exception of the every-five-second-flash.

I've spoken to the dealership, and they're baffled. I've called the BMW Genius line, and they have no answers.

Has anyone had a similar problem and, if so, how did you solve it. I would really prefer to not go to my dealership since I've had such bad experiences with them and my last two cars.

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Old 03-15-2019, 08:44 PM
BMWtechN63 BMWtechN63 is offline
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Location: not sure
Join Date: Jul 2017
Posts: 92
Mein Auto: Not a BMW
sounds likes you have a bad radar lane detection sensor or your cameras need calibration. I would say it is 99% your radar and probably the rear bumper one. the bumper would need to come off and replace the sensor.
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Old 03-16-2019, 02:31 PM
quackbury's Avatar
quackbury quackbury is offline
///Monkeyazz Duck
Location: Not In Kansas Any More
Join Date: Dec 2005
Posts: 6,983
Mein Auto: 540i; 428 GC; 340i 6MT
Try the old school approach: Turn the system off and adjust your mirrors properly?

I'm guessing you are out of warranty and are looking at a $1,000 to $1,500 bill if you have your dealer do the work. If you absolutely MUST have the system work properly, join BMWCCA and ask your local chapter to recommend a reputable indy in your area.
Current BMW's:

2017 540i MSport
2016 428 GC MSport

Prior BMW's
2018 340i RWD 6MT MSport
2015 X1 35i xDrive
2015 X1 28i xDrive
2014 535i MSport
2014 328i SportWagon
2011 535ix MSport
2011 X5 35D
2008 ///M3 Vert
2008 X5 3.0
2007 X5 3.0
2006 X5 3.0
2006 550iA SP
2003 540iA M-Technic
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