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post #1 of 14 (permalink) Old 02-28-2019, 12:54 PM Thread Starter
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Angry BSM malfunction

Have a 2017 RAV4 that the BSM malfunction light came on while driving. Took to dealer and they said Id been hit in the right rear near sensor, so the warranty wouldnt cover it.
Well I have not been in any accident, nor is there any sign of damage to my car.
They suggested I file a claim, which I did not do.
I purchased an extended warranty when I made the initial purchase that covers electronics for 7/8 years, but they said it wouldnt cover because I had had damage, which is untrue.
And the price to fix was $1400. Ridiculous!
So what suggestions does anyone have. I can just drive without it and never purchase a Toyota again from this dealer or just not purchase a Toyota at all again.
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post #2 of 14 (permalink) Old 02-28-2019, 02:30 PM
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can you see any damage to sensor? I'm kind of curious what they see to say it was hit.
If it was hit and damaged then warranty or extended warranty won't cover.
That would be covered under your car insurance.
If you don't see damage, maybe take it to a different dealer and see what they say.
I know if I didn't see any physical damage I would raise h3ll and call Toyota complaint line.
For some reason I get a lot of rock chips on the back of my RAV which seems strange to me.
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post #3 of 14 (permalink) Old 02-28-2019, 03:07 PM
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Have a body shop look at it?

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post #4 of 14 (permalink) Old 02-28-2019, 03:57 PM Thread Starter
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No visible damage on sensor itself. Way off to side about 8/10” is maybe a scar from a thrown stone in the road. Service said their computer can tell that is was hit. Can they really tell that?
Also if a slight bump can disengage the sensor, it’s very fragile and could happen often.

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post #5 of 14 (permalink) Old 02-28-2019, 04:44 PM
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The BSM sensor is a black box(about 4 inch by 4 inch big) and it sits under the bumper cover on the corners of the rear bumper. You usually can't see it without removing the bumper cover. If there is an impact to the bumper it can shift the postition of the sensor and throw an axis misalignment code. Damage may not always be present. Is this the type of code that your getting for the BSM?
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post #6 of 14 (permalink) Old 02-28-2019, 04:52 PM Thread Starter
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A warning message pops up on my dash and says BSM malfunction see dealer.

Does Toyota’s computer tell them the bumper has been hit with a code or do they just look for a visual scar on my bumper to be able to say it was hit. How can they be sure wether it was hit or it’s just a damaged sensor box like a wire or connection inside?

And why do the have to order a new sensor rather than just re align it?

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post #7 of 14 (permalink) Old 02-28-2019, 05:40 PM
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The computer does give a code that can indicate a hit. It doesn't actually say that it registered an impact. It just says "beam axis misalignment" which tells the technician the sensor was moved from it's original position. They are very sensitive. I can't answer all your questions because I don't physically see the sensor or know exactly what code the dealer received. The sensor can be recalibrated but it's not a quick easy process. The shop I work for charges 2 hours of labor for a recalibrate of the BSM system. If a calibration doesn't work. Then the bumper cover has to be removed and the sensor alignment inspected. If all is good, the code could be an internal failure of the sensor. But this is rare. Everytime I've seen a beam axis misalignment code. It's always been a hit bumper.
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post #8 of 14 (permalink) Old 02-28-2019, 05:42 PM
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Why not ask the dealer of proof of the damage?
What message are they getting and to show you what test they are actually doing.
Somehow sounds like BS to me.

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post #9 of 14 (permalink) Old 02-28-2019, 06:22 PM
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I would think there would be a scuff mark if someone hit the bumper

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Originally Posted by KTooTall View Post
The BSM sensor is a black box(about 4 inch by 4 inch big) and it sits under the bumper cover on the corners of the rear bumper. You usually can't see it without removing the bumper cover. If there is an impact to the bumper it can shift the postition of the sensor and throw an axis misalignment code. Damage may not always be present. Is this the type of code that your getting for the BSM?
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post #10 of 14 (permalink) Old 02-28-2019, 06:53 PM
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Originally Posted by greenpus View Post
I would think there would be a scuff mark if someone hit the bumper
Most of the time yes. But it's not always noticeable. The sensor is big and sits right behind the cover. A small impact right on top of the sensors location could throw it out of alignment and cause little to no damage. Sometimes you can see the paint cracked but you have to look real close. It doesn't take much to upset them.
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