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Faulty head gasket, brakes and self driving features...

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1.5K views 14 replies 5 participants last post by  atc98092  
#1 ·
Here’s a quick update that might help others: After replacing a faulty head gasket and rear brake pads at 16K miles, my vehicle’s media console stopped working and the radio would not turn on. I also received road sign recognition alerts, and the car could not read traffic signs. I figured out that a long press on the radio button resets it. During this issue, the car drove smoothly with no jerking and good acceleration.

Since then, I’ve turned off all possible self-driving features, which has improved things, but I still face occasional issues. Unfortunately, these features need to be disabled every time the vehicle is turned on, which is frustrating!

I used to rely on the speed sign feature for monitoring speed, but now I worry it might interfere by slowing down the car unexpectedly and eating my brakes. I hope turning off these features helps. It’s worth noting that my previous VW's brakes lasted well over 60K miles before needing any replacement.
 
#2 ·
I used to rely on the speed sign feature for monitoring speed, but now I worry it might interfere by slowing down the car unexpectedly and eating my brakes.
The excessive brake wear was not due to that. VW uses soft friction material in their brake pads, and they simply don't have a long life. They replaced my rear pads last month at around 13k simply because they wore out. People who have replaced the pads themselves with higher quality (usually ceramic) pads are getting the pad life that is more expected from a car today.
 
#3 ·
The brake wear is partially related to the drive assistance features, it does use rear brakes but it's also the material


We had infotainment issues and there was a tsb update for a new version and it's been great ever since. I posted the version someplace in infotainment threads.

The infotainment houses the computer that does the backup camera, prox sensors, road signs and instrument display and probably a lot more that isn't infotainment.
 
#4 ·
Thank you for your feedback. After driving it for a bit, I have noticed that the vehicle still revs when I try to accelerate, as if the gas and brakes are being applied simultaneously. I am curious if anyone has tried covering all the sensors to address this issue. Does anyone have a map of where all the sensors are located?
 
#6 ·
I am not sure what I could have missed. Maybe ESC (Electronic Stability Control System)? Turning ASR off? Or putting it into ESC sport mode? I am thinking they do not allow you to fully disable some of these options and the only way to correct this would be to cover up the sensors.
 
#7 ·
I found this on ASR:

Here are some cons of ASR:
  • It may reduce the acceleration as well as the performance of the vehicle.
  • It may interfere with your driving preference or style of driving.
  • It may fail or malfunction sometimes.
When the system detects that the wheel is slipping, it adjusts engine power and braking system to ensure maximum traction. The sensors work on the wheel, brake, and engine of the vehicle.

source: What Is the Difference Between ASR And ESP? Explained - Pro AutoSafety

I’ll give this a try and see how it works out, but I find it quite cumbersome to turn off these options. Unlike other vehicles with a simple button, this one involves extensive scrolling, clicking, and confirming, and it has to be done while the car is parked each time the vehicle is started. When I’m in a hurry or dealing with multiple tasks, it is easy to forget to do it. I’m wondering if there might be a quicker way to manage this, possibly through an app.
 
#8 ·
I'd be more concerned that it was a problem with the transmission or clutches. I don't see any undo reving when I'm driving. I do notice that starting on a hill the autohold will keep the car stationary until there's enough throttle input for the car to being moving. The only time I've seen the computer interfering with the throttle is brake application on a wheel moving too fast in slippery conditions (which certainly hasn't been the case here for 6 months).
 
#9 ·
Just to provide an update, I attempted to turn off ASR, but it did not make a difference.

Troglite, I understand your perspective, but when I initially received my car back after the repair, the infotainment system was not operational and could not recognize signs, yet the vehicle drove perfectly. I was able to achieve full acceleration whether in a crowded parking lot, sitting in traffic, or on an open road. I felt as though I had complete control. There was no hesitation and the RPMs did not increase without a corresponding acceleration.

It is difficult for me to believe that I am the only one experiencing this issue. I am wondering if covering up all the sensors would alleviate the problem. Does anyone know where all the sensors are located?
 
#10 · (Edited by Moderator)
I still think you're chasing a different solution than what is going on. I have no issues with mine and I have updated the throttle via Carista to change from time based to linear throttle. there are many other settings in Carista.

the infotainment system is a core computer in the car function who knows what is or isn't working with that non-functional. transmission, throttle, auto-braking, etc
 
#11 ·
I have not had a chance to check into the Carista yet. I did explain the issue to the dealership, but they claim that the car performs as expected every time they drive it. They also mentioned that the shifting behavior of this car is different—it sometimes skips from 1st to 3rd or from 2nd to 4th. Perhaps this is causing the lag?

My previous VW did not have this issue, so I was expecting the same performance from this one. I want a car that responds immediately when I press the gas pedal. I find this lag to be somewhat dangerous. Recently, while trying to pull out onto a busy street, a car sped up suddenly, forcing me to brake hard with oncoming traffic. When I tried to accelerate again, the lag caused me to be stuck in the middle of the road with traffic approaching.

I am considering trading this car in, but I am not sure what to get. I liked the first generation Tiguans, but they do not make them anymore.
 
#12 ·
They also mentioned that the shifting behavior of this car is different—it sometimes skips from 1st to 3rd or from 2nd to 4th.
I'm not certain that's accurate. I've always been under the impression that a DSG cannot skip gears, since the same clutch pack is used for every other gear. It would not be able to smoothly shift while skipping a gear.
 
#14 ·
I got a new engine head gasket at 24k, now at 42 k I noticed decreasing coolant level again....I bet I got the old designed head gasket which failed again ....also I got new rear brake pads at 28k now at 42k it is down to 5mm...did I get the same batch of faulty brake pads? Or is it a design flaw os braking system...the front braking pads are at 7mm....it is frustrating....
 
#15 ·
also I got new rear brake pads at 28k now at 42k it is down to 5mm...did I get the same batch of faulty brake pads?
They aren't exactly faulty. It's just that VW is using a very soft spec brake pad (probably because it's cheaper). Owners are replacing the pads themselves with ceramic pad and brake pad life is far better.