Model 3 Autopilot recalibration after new windscreen? Lane positioning.

[MrBadger]

I've seen various contradictory comments about whether Model 3 needs a camera recalibration after a new windscreen.

I've done first drive on Autopilot since a new windscreen and the car is now sitting very much off to the left of the lane. Uncomfortably so on a couple of occasions.

I've added it to my follow up mobile service appt, but I'm not sure if this is something to do with windscreen replacement and needs a recalibration, a software update or just me not having driven the car for a while?

Poor quality dashcam screen shot below to show car off to left of lane. From within the car, it feels even further left than the dashcam. Unfortunately left mirror needed too much adjustment too far to see how close I was to the line to see if I was imagining things. However left and right rear views also visible in capture, albeit equally poor as right is partially truncated, and it looks like we were pretty close to the left lane markings.

 

[Pilotpem]

Is it any different in the left hand lane with the solid white line to ‘follow’?

 

[MrBadger]

No. On a dual carriageway nearside lane it felt uncomfortably close at times to the solid white line.

Where it was most marked, and also commented on by wife, was when engaging autopilot. Normally my lane position needs a very slight correction when AP engages. but this time, the car was swerving significantly to the left.

 

[CSTM3]

In short, yes.
Windscreen Calibration - ADAS Calibration

 

[MrBadger]

Well yes, that is one of the contradictory pieces of information previously dismissed as unnecessary in certain circumstances. It is definitely true with some versions, but its more muddled with AP2.x/3 ie Tesla told me it wasn't needed on my model S. The manual only suggests taking it to Tesla for appropriate handling and camera mounting (attached image) so I would like to think that Tesla did the correct process since it was them that did the replacement. And of course, the car can self calibrate its own cameras, for example, when first driven, so its not necessarily a physical process.



So looking for someone who actually had a replacement windscreen and had calibration done. Its still unclear to me whether this preference to stick to the left of the lane/road is change in functionality (by lack of 'my car sticks to left answers' I guess not) or something as a result of windscreen replacement, but not sure exactly what. If it is a camera problem, its not triggering the 'cameras require alignment' message.

I forgot to mention that the driver display showed the car sticking to the left of the lane, so car seems to know where it is in the lane, but chooses to stick to the left.

 

[CSTM3]

I forgot to mention that the driver display showed the car sticking to the left of the lane, so car seems to know where it is in the lane, but chooses to stick to the left.

That seems odd... only time I notice my M3 doing this kind of thing is when it's next to something very large such as a lorry.

 

[MrBadger]

That seems odd... only time I notice my M3 doing this kind of thing is when it's next to something very large such as a lorry.

Absolutely. But nothing around me - I wouldn't normally stick in 2nd lane, but I was doing a test drive having recently got car back from service and wanted to check a few things before ranger appt later this week. Good job I did as this and one other item added to the list.

 

[NorfolkMustard]

I had windscreen replaced last year by Tesla @ weybridge (they actually get a specialist in from West Drayton I think, he had 3 to do in a day )

calibration is part of what they do, it was a separate line in the invoice. They said all they do is drive it around, the same as we all did on collection day

 

[CSTM3]

Go for a long drive then hehe

 

[MrBadger]

calibration is part of what they do, it was a separate line in the invoice. They said all they do is drive it around, the same as we all did on collection day

No mention of a calibration or what their best lap time was...

Only 1/4 mile put on clock during that service centre visit so not enough for a recalibration drive. As I didn't drive car back, don't know if it recalibrated on its way back - if it did, it completed within 16 miles as it was one of the things I checked for when I first got in.

So that suggests it may be something needing to be done. Hopefully ranger or remote diagnostics can sort if needed.

 

[NorfolkMustard]

Interesting. Here’s my invoice

 

[MrBadger]

Nope, nothing like that. But it was a goodwill payment so maybe its (not) recorded differently.

 

[MrBadger]

A few days, a minor software update and a reboot, and everything back to normal. Not sure of the cause nor the resolution, but happy with how its driving. It was on my now postponed service appointment so possible that something tweaked remotely. But still no sign of a recalibration.

Autopilot performance wise, very heavy traffic heading west, a couple of stop starts and cars barging in at junctions, the car behaved excellently. I hadn't realised quite how heavy the traffic was until I came back the other way. It was pretty much 3 lanes nose to tail.

One uneventful phantom brake, probably an overhead footbridge, two disengagements, one of me overreacting to being barged from the left and boxed to the right - I think the car would have sorted the situation itself as it was already braked hard at point I took over. The other disengagement was someone close on my tail as the lane split and the car couldn't make up its mind which one to take - nothing new there.

 

[LukeUK]

Thanks for the follow-up post.

My M3LR is in Digbeth SC overnight, due to have its windscreen replaced tomorrow, as there's a faint line following the arc of the driver's side wiper that appears to be a scratch, rather than a mark.

This post has been interesting reading. It's a 50 mile drive home so it will be interesting to see how AP performs.

 

[AndrewGR]

I’ve recently had.my windscreen replaced by Autoglass. They said they didn’t need to do any recalibration, the car did it itself. I haven’t been aware of the car doing a recalibration but AP is working at least as well as before.

 

[GeorgeSymonds]

My usual go to resource says that its the pitch angle that can be out and needs calibration but they're not suggesting its obligatory

Tesla windscreen replacement

A "drive cycle calibration" sounds a bit like a "reboot the system and give it a test drive for 20 mins and pay for the labour" which you'd probably do to get home

What I've found with the lane positioning is the car often sits nearer to one side or the other of the lane when driving which is annoying, but the car is also shows it sitting close to the lane edge on the screen which implies the car knows its to one side. That would suggest its not a camera calibration issue at all. The one time it got so bad I had to take it in they said it was a steering wheel and steering rack calibration issue.

 

[Joshky]

Sale thing just happened to me. I put 77k miles a year on FSD, so it is a big deal. I had my windshield replaced yesterday, and immediately it started giving the right side of the lane. It actually hit a curb. Have you ever found a solution?