[tencate]

Hard to answer because not all of us have gone sequentially through all these version. I jumped from 12.5.x to 12.6 something... I never saw 12.6.1

 

[zroger73]

As far as the 12.x versions, I've used 12.3.6, 12.5.4.2, 12.6.1, and 12.6.3.

12.6.1 was by far the best.

I just had my second drive with 12.6.3. It drove 50 mph in a 55-60 MPH zone then 82 in a 75 and kept varying. The steering has a nervous feel - too many micro corrections on the highway trying to keep the vehicle centered in the lane. Made a couple of unnatural turns. Definitely worse than 12.6.1 for me. Still not nearly as bad as 12.5.4.2, though - those frequent hard brakes for green lights and jackrabbit starts were brutal.

 

[tencate]

After a software update, is there any "calibration" needed or done? (Vehicle dynamics are somewhat different on a car with 18 inch versus 19 inch wheels for example). I ask because the very first drive with the latest release was weird. The car was driving ON the double yellow line around tight corners, the twisties up to Los Alamos proper felt very unsettled, etc. It was a lot like me when I get into a car I haven't driven before and I have to get used to the steering, clutch, etc. But a LOT of that is gone now and the car seems to behave pretty much like before. (So far I very much like this latest, some common FSD fails passed with flying colours.)

 

[Bigriver]

@tencate, I have experienced similar. I first drove my 2018 model 3 with FSD 12.6.3 last week-end, and as I reported above, it had a strong bias to the left and sometimes went over the line. I drove it yesterday and it was much improved but not perfect. I recalibrated the cameras, although my understanding is that we aren’t supposed to need to do that after a software update. I can’t tell that it helped, but it didn’t hurt.

Interestingly I just got FSD 12.6.3 on my 2017 model X and on my first test drive it didn’t have the lane centering issues. But it didn’t have the smoothness - still doing micro hesitations and some 90 degree turns were quite awful.

 

[lancegoddard]

This week-end I got FSD v12.6.3 (2024.45.32.10) on my HW3 model 3. It came from FSD v12.5.4.2. This is its first implementation of the Chill/Standard/Hurry profiles and the different user speed controls since v12 first came out. I have had these options on my HW4 car for over 3 months and have been very anxious to see them in their HW3 manifestation.

I did a 50 mile test drive this afternoon with v12.6.3, and then turned around and did the same drive in my HW4 model S (v13.2.6, also 2024.45.32.10). With both cars I used the Standard profile and max speed set to +10% over the speed limit. The drive included limited access highway, divided highway with traffic lights, and rural 2 lane roads.

The tldr version is that I agree with much of what is being reported, that v12.6 is a huge step forward for HW3. Not surprising, it is not up to the caliber of HW4 v13.2.6.

The best thing is the smoothness of the drive. Both on the main road and during turns, the jerkiness and micro hesitations were gone. Acceleration and stopping are smooth and timed similarly to how I drive. No last minute teeth-clenching stops at stop lights. No pausing at green lights. The main driving and smoothness is very similar to HW4.

The worst thing is that the car never centered itself in the lane. It had a strong bias to the left on straight sections and to the inside of turns. It went over the lines a number of times. These are not problems in the current HW4 version.
View attachment 56816

I like the speed control settings and the ability to change the max speed with the scroll wheel. I think it is a huge improvement over the auto/manual selection of earlier v12. But there are still plenty of issues with the implementation.

• The Chill/Standard/Hurry profile is only displayed on a limited access highway. When the profile is not displayed, it cannot be changed with the right scroll wheel. On HW4, it is always displayed and you can always change the profile setting with the scroll wheel.
• On a limited access highway, the max speed is always displayed, even if below the max speed. On all other roads, the max speed is only displayed if you are going the max speed. You can briefly see the max speed setting by scrolling the right wheel up or down. HW4 is the same.
• Sometimes, the max speed setting works just as you expect, in my case, 10% over the speed limit. There are times, though, that it totally ignores your setting. One example is on a local 4-lane highway, with a speed limit of 45 mph, the car was going over 60 mph. I checked the max speed setting and it was 65 mph. This is a road section where the traffic typically goes over 60 mph. I'm actually fine with what FSD was doing in this particular case, but it gives me pause that it was going significantly over my settings. This behavior is the same as the current HW4 version.
• I can scroll down the max speed, and the car quickly responded in all my tests. Same for HW4.
• If I am at the max speed and scroll up the max speed, the car doesn't necessarily respond at all. Pretty much the same on HW4.

Some other miscellaneous things.

• There were no random, inappropriate lane changes. It actually erred on the side of staying in the slower lane, making me double-check that I was in Standard, not Chill. HW4 Standard is a bit more aggressive (but still appropriate) with its lane change choices.
• I could turn off automatic wipers while in FSD. I did this after one dry wipe. This is not one of my pet peeve issues, so do not know if maybe they implemented this capability a while ago.
• Once it got in the left turn lane when it needed to get in the right turn lane. This has been a sporadic problem with various versions of FSD, trying to turn the opposite direction as what the navigation shows. I don't know if it would have repeated this at the same intersection. The HW4 test drive got it right.
• It tried to turn right at a red light on a NO TURN ON RED location. HW4 made the same mistake.
• It set the max speed to 42 mph on a rural road that it showed the speed limit as 25 mph. I didn't see any signs and doubt 25 mph was the correct limit. I thought 42 mph was a fine max speed but note the discrepancy if the road was actually 25 mph. HW4 was the same.
• It made a few overly dramatic swerves when on rural roads. One was to avoid a large puddle that was actually off the road, and one was an off-road limb (at least that is my theory for the swerve). HW4 did not do these things, appropriately ignoring things that should be ignored.

Tried it out yesterday and note that it continues to ride on the yellow line on blind curves on my usual two-lane highway ride. Fun to play with occasionally, but this to me is a continuing fatal flaw - and has been for a long time. I report it when it gives me the opportunity but this has obviously been ignored for a long time.

 

[ggreen4077]

Since the most recent FSD update (moderator edit: M3LR Update 12.6.3), the set speed display has disappeared when on non-interstate roads. Anyone else experience this? It has been a long standing issue that the right scroll wheel does not work to adjust speed up or down on these roads, but the set speed display was visible. Now it's gone.

 

[Bigriver]

the set speed display has disappeared when on non-interstate roads. Anyone else experience this?

Yes...

On a limited access highway, the max speed is always displayed, even if below the max speed. On all other roads, the max speed is only displayed if you are going the max speed. You can briefly see the max speed setting by scrolling the right wheel up or down.

It has been a long standing issue that the right scroll wheel does not work to adjust speed up or down on these roads

Prior to HW3 FSD 12.6.*, that was true. Now with these latest versions, you can adjust the max speed up or down with the right scroll wheel on all roads. It may or may not respect your setting. Actually, I have been finding it to mostly respect my maximum, but not always.

 

[Greg Smith]

There is still a corner near me I don't trust it yet so I always dissengage there and don't count it against FSD. One day when it isn't busy I'll let it try that.

I've since tried this corner 3 times. The corner is a T intersection and is blind from behind the crosswalk. The correct way is to stop behind the crosswalk then creep up until you can see both directions. I need to turn left. There is room for cars turning right to get on the right side of left turning cars and turn right when clear. The first try, no cars behind me or turning right, car was flawless. Second time, car somehow got impatient and decided to go when car was coming from right. I had to step on brakes to not cause an accident. Third time, car came next to me and went to turn right. Once it was done, my car decided to go, except cars were coming from both directions. Had to slam on brakes to keep from accident. Won't be trying this corner again on this version.

 

[dan27125]

FSD 12.6.3 Serious problem with lane centering and swerving.
Tesla 2018 Model S Software 2024.45.32.10 FSD 12.6.3 HW 3.0
Infotainment upgrade w/Intel CPU

Lane centering problem. Now Left justified
Feb 11, 2025 Greetings from St Louis,

MO, USA. My wife and I have two (his and hers) 2018 Model S. Recently both cars updated to FSD 12.6.3
I have initiated camera calibration multiple times on both cars. Makes no difference. We both observed the following problems:

1) Lane centering is gone. It is now left justified most of the time. Attached are pictures. Highway 270, 10:56a, light traffic, visualization display and windshield showing left justification. This picture is mild. There have been many times where the car was even more to the left side. Even crossed over into the left lane. The quantity of painted lines seems to have an effect. If there are double painted lines it puts the car over to the left even more. At night on two lane roads (one lane for each direction) with double yellow lines it pus the car body right at the 2nd line to the left. I had to disengage several times to avoid collision from car coming towards me in other lane. Sometimes a low minority of the time lane centering will be fine. Not sure why.

2) Phantom right turns. In light traffic on the highway occasionally for no reason the turn signal will come on and the car will start to change lanes then then switch back. A few times the car has swerved for no good reason.

3) When auto pilot is set to Full screen visualization the FSD Speed limit is no longer shown. When disabled it the FSD Speed limit (and now mode chill vs standard) is shown but randomly disappears. I think it is a very bad idea not to show FSD's allowed maximum speed limit.

The previous version of FSD did not do any of this. I'm wondering if this left justification just happening to legacy model S ?
Is it happening to model x or 3 cars as well ?

Dan
C/C++ Software Engineer
St louis, MO, USA

 

[Bigriver]

The previous version of FSD did not do any of this. I'm wondering if this left justification just happening to legacy model S ?
Is it happening to model x or 3 cars as well

Yes, others including me have reported the same centering issue, above. I find it worse in my 2018 model 3 than my 2017 model X.

As far back as I remember, full screen visualization in legacy S/X has taken away key information in FSD. So I have not used full screen visualization for awhile.

 

[bwilson4web]

We need mi/kWh and elapsed time benchmarks of at least 20 miles in:

• Chill + City
• Chill + Interstate
• Standard + City
• Standard + Interstate
• Hurry + City
• Hurry + Interstate

Try to include weather and traffic conditions along with anything else that might impact the results. The reason is for my future, 1,200 mi trips to witness the Starship launches.

It typically takes me 24 hours to drive 1,200 miles. I have to pay for charging, so CHEAP is good. But at age 75, FAST is appealing too. Full Self Driving handles GOOD.

Bob Wilson

 

[bwilson4web]

Ran two, round trip, 40 mi benchmarks at 52-53 F, 10:30 PM to 11:47 PM:

• Chill - baseline
  • 40 minutes
  • 256 Wh/mi
  • 10 kWh
• Hurry - 90% quicker time, 10% higher kWh/mi
  • 36 minutes (36/40 = 90% of baseline)
  • 281 Wh/mi (281/256 = 110% of baseline)
  • 11 kWh

Chill:

Hurry:

NOTES:

• Speed limit signs are often read but ignored to follow the "stale" map data.
• "Hurry" seems to respond to passing traffic by increasing speed to the MAX. When the traffic gets far enough ahead, it rolls back to the previous cruise speed.

Bob Wilson

 

[bwilson4web]

It sill has the lane shift into an ending merge lane ... irritation. The only new thing I found:

The stale map, speed zone remains but the 'coast through' fix continues to work.

Bob Wilson

 

[ken98045]

I HATE the fact that 12.6.3 removed the large max speed display and put it up in a tiny, hard to read font that isn't even displayed all the time! You now have to look over there a half dozen times to read what speed Tesla has chosen. But, FIRST you have to adjust the max speed in order to see it at all. And, while I'm at it why do I need the driving mode "standard" constantly displayed? I set this once and never change it (unless Tesla randomly changes it on a software update which it FREQUENTLY/RANDOMLY does).

There are 2 circumstances where this is a HUGE problem. First, FSD may decide to speed dramatically over the speed limit. This is particularly bad with the default 40% over the speed limit. Where did THAT come from. So, if the speed limit is 35 it decides to go 50???? Yes I know I can change it to something more sane, but I think 5% is the minimum.

Second: Due to wet pavement or other circumstances it may decide to travel 10mph below the speed limit. BTW, it is particularly bad about make those decisions. Regardless, suddenly traffic is passing you on the left and right! It used to at least ding and let you know it was reducing the speed, and what it was reducing it to. And, no it doesn't keep up with traffic under this circumstance.

 

[ken98045]

For the last year FSD has been handling roundabouts pretty well. However, today it entered the roundabout at the end of a freeway exit (going too fast IMO) It was on the inside lane where it should have been. Suddenly, and VERY violently it jerked me into the rightmost lane and attempted to (I think) force me into a lane that was re-entering the freeway. At the same time the "Take Immediate Control" tune played. I think that that merry little sound played because I was forced to grab the wheel and fight hard against FSD, NOT because it realized it didn't know what it was doing.

So, watch those roundabouts!

BTW, why is the Take Immediate Control tune/display started because you have ALREADY taken steering control. It has been doing this for the last 3 probably many more updates. This makes no sense, except, I guess, that sometimes the amount of force to take steering control can be very low in many cases, and maybe FSD wants to be sure you were serious. Still, some other display/sound might be more appropriate.

 

[ken98045]

FSD 12.6.3 is driving too close to the left lane line when you are driving in the middle or right lane. I think that it is about 2 feet closer to those lines than in previous releases. I don't think it is drifting over (judged by looking at other Teslas in front of me), but it is very close (6 inches to a foot). At the very least this is making me super uncomfortable relying on FSD. This seems particularly pronounced on a left curving road.

 

[zroger73]

I HATE the fact that 12.6.3 removed the large max speed display and put it up in a tiny, hard to read font that isn't even displayed all the time!

ME, TOO. Tesla's HMI isn't friendly to eyes over the age of 40 - even with the "larger text" option selected. And, this blue-on-white maximum speed display is particularly difficult to impossible to read.

 

[bwilson4web]

Here is the FSD, dead end, merge lane incursion:

It existed in previous versions with more exciting behavior if there were a concrete wall on the passenger side.

WORKAROUND:

Use turn signal to abort the incursion and return to the correct route lane.

Bob Wilson

ps. Now that I've figured out how badly the dash cam recording to USB stick works, I'll be able to bring more of these.

 

[canux]

For those wondering, I have a 2025 (old version) Model Y and with the recent software update have noticed it driving too far left. My biggest problem with FSD where I am is how it handles disappearing right lanes. It will often merge into a lane that’s about to disappear and then have to merge back. I know this is partly because I have it in Chill mode where it favors that lane, but it really shouldn’t do the merge right before the lane expires.

 

[Your Blueness]

FSD 12.6.3 is driving too close to the left lane line when you are driving in the middle or right lane. I think that it is about 2 feet closer to those lines than in previous releases. I don't think it is drifting over (judged by looking at other Teslas in front of me), but it is very close (6 inches to a foot). At the very least this is making me super uncomfortable relying on FSD. This seems particularly pronounced on a left curving road.

Try recalibrating your cameras.The last 2 updates required this to correct this and many other anomolies.