Blind Spot Monitor Lights Abnormal

[Bob Taylor]

Thanks for sharing. Honestly that sounds quite odd to me. What were your symptoms?

Mine is triggered most of the time randomly without any corellation to what is around the car, but at the same time also detects real cars as it should.

I remember that original test drive car was not doing this and now this second loaner car just confirmed my suspicion that there must be something wrong with mine.

My 2025 Macan 4 is doing the same - Dealer just installed the latest software update and said the problem was resolved - just returned from a 700 mile trip and found the error is still happening. I'll call soon to report, but figure they'll blame the software again

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[ColdCase]

Try opening and closing the mirrors, that recalibrates the system.

 

[Bob Taylor]

Try opening and closing the mirrors, that recalibrates the system.

I'll give it a try - Thanks

 

[TomekGnomek]

Well I am looking, but I dont see anything being unavailable after selecting PTS.

https://configurator.porsche.com/en-US/mode/model/XABDE1/option/GJ7

Notes: (...) In conjunction with Paint to Sample, the function of initiating a lane change via the indicator is not available.

My local dealer told me paint thickness is very important for these systems to work correctly and hence Porsche does not allow a respray of bumpers, you have to replace them.

In my case it helped with blind spot false positives from being super annoying to just being annoying but did not eliminate the problem.

Overall blind spot monitoring and lake keep assist in Macan are the worst implementations of these features I've seen in any car. In Taycan they work quite well but in case of PPE they failed.

 

[Bob Taylor]

https://configurator.porsche.com/en-US/mode/model/XABDE1/option/GJ7

Notes: (...) In conjunction with Paint to Sample, the function of initiating a lane change via the indicator is not available.

My local dealer told me paint thickness is very important for these systems to work correctly and hence Porsche does not allow a respray of bumpers, you have to replace them.

In my case it helped with blind spot false positives from being super annoying to just being annoying but did not eliminate the problem.

Overall blind spot monitoring and lake keep assist in Macan are the worst implementations of these features I've seen in any car. In Taycan they work quite well but in case of PPE they failed.

Hard to imagine having to replace the whole bumper - the little sensors should be easily removed and replaced, but maybe I'm mistaken, maybe the little round sensors are for something else.

 

[ColdCase]

It is a common misconception that those little sensors are more than parking distance sensors. Blind spot primarily uses the RADARs behind the rear bumper facia which, in theory, could be affected by metallic paint. Lane keep and accident warnings use the cameras, primarily the front facing ones and in the outside mirrors. All the sensors are used in one form or another.

 

[Bob Taylor]

It is a common misconception that those little sensors are more than parking distance sensors. Blind spot primarily uses the RADARs behind the rear bumper facia which, in theory, could be affected by metallic paint. Lane keep and accident warnings use the cameras, primarily the front facing ones and in the outside mirrors. All the sensors are used in one form or another.

Good to know, thanks for the info - I just got back from a trip where the problem was fairly constant, but after washing the car (it wasn't that dirty) the issue seems to have been resolved, at least for now. I took the car for a quick run on the interstate and couldn't make it fail. (Which means it only fails when you don't want it to)

 

[ColdCase]

I've owned a couple cars with side radars and don't recall blind spot false positives or missing a detection short of operator error. And this included plenty of rain or dirt or nasty weather. Those systems that augment with video can be more susceptible. I don't know if the Porsche blind spot algorithms get upset when the cameras are dirty.

I don't recall any of my cars that use RADAR for adaptive cruise to drop out, but then most had heaters in the front radar dome to clear ice/snow. The cars that augmented with cameras would often provide degradation warnings but only the Macan often drops out facing the sun, similar to cars with camera only (LIDAR) detectors. My BMW based Mini is a PITA for this, because when it drops out it applies regen, slowing significantly enough to risk getting run over. So I rarely use it.

Have you noticed one side or another being more fickle?

 

[TomekGnomek]

Good to know, thanks for the info - I just got back from a trip where the problem was fairly constant, but after washing the car (it wasn't that dirty) the issue seems to have been resolved, at least for now. I took the car for a quick run on the interstate and couldn't make it fail. (Which means it only fails when you don't want it to)

Agreed, in my case having even a light dirt on the car contributes a lot to these systems going off the rails. Another case that shows there are some design flaws in this area.

Have you noticed one side or another being more fickle?

Yes, the one with more dirt

 

[Bob Taylor]

Agreed, in my case having even a light dirt on the car contributes a lot to these systems going off the rails. Another case that shows there are some design flaws in this area.



Yes, the one with more dirt

Always the passenger side - (The right side in the US)

 

[Bob Taylor]

I've owned a couple cars with side radars and don't recall blind spot false positives or missing a detection short of operator error. And this included plenty of rain or dirt or nasty weather. Those systems that augment with video can be more susceptible. I don't know if the Porsche blind spot algorithms get upset when the cameras are dirty.

I don't recall any of my cars that use RADAR for adaptive cruise to drop out, but then most had heaters in the front radar dome to clear ice/snow. The cars that augmented with cameras would often provide degradation warnings but only the Macan often drops out facing the sun, similar to cars with camera only (LIDAR) detectors. My BMW based Mini is a PITA for this, because when it drops out it applies regen, slowing significantly enough to risk getting run over. So I rarely use it.

Have you noticed one side or another being more fickle?

The passenger side (The right side in the US)

 

[ColdCase]

Always the passenger side - (The right side in the US)

I would suspect a weak RADAR on the passenger side. Is the video quality of the passenger side curb view video different than the driver's side?

 

[Bob Taylor]

I would suspect a weak RADAR on the passenger side. Is the video quality of the passenger side curb view video different than the driver's side?

No

 

[EVowner]

https://configurator.porsche.com/en-US/mode/model/XABDE1/option/GJ7

Notes: (...) In conjunction with Paint to Sample, the function of initiating a lane change via the indicator is not available.

My local dealer told me paint thickness is very important for these systems to work correctly and hence Porsche does not allow a respray of bumpers, you have to replace them.

In my case it helped with blind spot false positives from being super annoying to just being annoying but did not eliminate the problem.

Overall blind spot monitoring and lake keep assist in Macan are the worst implementations of these features I've seen in any car. In Taycan they work quite well but in case of PPE they failed.

Hm no such thing in EU configurator. I was told by service center that Porsche is currently aware about one specific PTS color that has some thicker consistency that can cause interference with blind spot monitor radar. I have full PPF on my car so factory forced service center to remove PPF from rear bumper to check if it is not causing random ghost detections before even trying to replace radar... To me this makes no sense, because if PPF is causing the issue it should be present all the time and not at completely random unrelated moments while driving.

I had full PPF on my previous cars and it never caused any problems with anything including blind spot monitor. I even asked shop that was installing PPF and they also confirmed that they never heard of it causing any problems on any type of car including Porsche cars...

 

[Bob Taylor]

Sounds like they're grasping at straws. If it doesn't work, will they replace your PPF?

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