Advanced Auto Key Door Handle Sensor Not Working on S4B8

[bernstma]

The door unlock lock feature when come up to my vehicle and run my hand behind the door handle is not working. I just ran the VAGCOM on the car using Ross/Tech.. it says there is an open circuit in the rear left door handle sensor G417 error. Does anyone know the part number for this sensor? Also, if one of the sensors is faulty will it cause none of the other 3 doors to work?

[02insight]

I have the same issue. My rear right handle sensor is bad and stopped all of them from working. If i clear the code, the rest of the doors work fine for one time until it detects the bad sensor and disables all of them again.


Sent from my iPhone using Audizine Forum

[LYKUNO]

There is a proximity sensor that is part of the door handle in each door. Should be part 4G8 927 753 B. Fits both right and left handles.


ECS Tuning carries them, though the Audi/VW OEM version is $215.93 versus the generic Vemo brand for $114.70.

Would not be surprised that an issue with one sensor would defeat the other 3 from working, but someone on here should be able to verify.

Edit to add a link to a DIY on removing the handle and replacing the sensor: https://www.audizine.com/forum/showt...eplacement-DIY

Edit #2 to add a couple of DIY videos!

[bernstma]

Thanks so much so helpful. I checked ECS and its crazy how expensive it is. I found the part at an Audi Dealer not too far from me for 160.00 so I would get the OEM part. I'll check tomorrow...

[Smac770]

Get a chinese knockoff on eBay for $20 or so. Look for one that's location USA for faster shipping. That's what I've used to fix two of them so far. A third one is now fritzing. Sometimes the lock/unlock works, but not the first time after the car has been sitting a while. Which is different from the others, where one would let the others work fine, and the other stopped them all from working. So depends on how the sensor has failed as to how it impacts the overall system operation.

[3.0ss]

^This. Please don't spend that much. I installed these in Jan of 2021 when mine stopped working and they've been perfect ever since. I would replace all 4 since it's pretty easy to pop the door handles off. Guarantee yours look just like mine did, they were all cracked and filled with water.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

[bernstma]

Thanks so much for this link. I will check these out. I did notice non of the videos out there address replacing the rear ones. They address the drivers or passenger side with the cylinder lock. I see in the video there is a T20 or T25 bolt that has to be loosened to remove the lock cylinder first. I couldn't find it on the rear door. I did notice a long piece of plastic on my drivers side rear door and I carefully using plastic tools pried it off. It actually was the cover for two holes. In the bottom hole I see the torx screw which is much farther back than on other models. I am going to attempt to take it off tomorrow. I am afraid because if the T20 bolt falls out inside the door I am screwed and would have to get a new screw.

[3.0ss]

Thanks so much for this link. I will check these out. I did notice non of the videos out there address replacing the rear ones. They address the drivers or passenger side with the cylinder lock. I see in the video there is a T20 or T25 bolt that has to be loosened to remove the lock cylinder first. I couldn't find it on the rear door. I did notice a long piece of plastic on my drivers side rear door and I carefully using plastic tools pried it off. It actually was the cover for two holes. In the bottom hole I see the torx screw which is much farther back than on other models. I am going to attempt to take it off tomorrow. I am afraid because if the T20 bolt falls out inside the door I am screwed and would have to get a new screw.

Yep rear is the same as the front. When you pop the torx with a screwdriver just give it a gentle tap. I hit one too hard and had to take the door apart to fish it out lol, not fun.

[Smac770]

The torx bolt should be captive in the slider. Notice the pics of the assembly: https://www.ebay.com/itm/173577155580

[Thugmeet]

i picked up a set of 4 off amazon for like 50 bucks

[bernstma]

I installed the replacement in the rear...fairly easy. I did notice a few things. I had to pry back the lock mechanism and it was a bit tricky getting it to stay so that I could get the handle back into place . I had to move the slider back and then slide it until it kept the lock in the unlock position. Finally, I had to reset the DTC codes for all the locks to unlock. Also, I did notice it is not as sensitive to unlock any of the doors. I have to put my hand on any of my doors vs just sliding my hand behind it to have any of the sensors trigger. Not sure if the other 3 units are getting old and need to be replaced also?

[LYKUNO]

That behavior seems a bit odd. I wouldn't have thought replacing a single sensor would cause a difference in the way the other 3 doors respond. Did you end up going generic or OEM on the sensor purchase? A couple of tips I noticed in the owner's manual:

If your vehicle has been standing for an extended period, please note the following :
• The proximity sensors are deactivated after a few days to save power. You then have to pull on the door hand le once to unlock the vehicle and a second time to open the vehicle.
• To prevent the battery from being discharged and to preserve your vehicle's ability to start for as long as possible, the energy management system gradually switches off unnecessary convenience functions. It is possible that you will not be able to unlock your vehicle using these convenience functions.

That said, I am curious to know whether you've recently replaced the 2032C battery in your key fobs. It's an easy thing to overlook -- I can't remember the last time I changed my fob's battery! If I recall, you might see an MMI message saying when the key's battery needs to be replaced. It doesn't take much effort or expense to install a new 2032 battery -- worth trying to see if that makes any difference in the door sensors' behavior.

[bernstma]

So I replaced the drivers side rear sensor and all was working fine up until today. I did another VAGCOM scan. and it looks like the front passenger right is now going? Is this the same code you guys are used to seeing? I might as well replace the other 3 and buy what you guys recommended in the earlier thread.. Otherwise they are going to go one at a time..

Here is my VAGCOM Scan...
Subsystem 1 - Part No SW: 8K0 905 852 D HW: 8K0 905 852 D
Component: J764 ELV MLB H37 0042
Serial number: 2310000022470009

2 Faults Found:
03286 - Sensor for Contact with Door Handle; Front Right
008 - Implausible Signal
Freeze Frame:
Fault Status: 01101011
Fault Priority: 2
Fault Frequency: 1
Reset counter: 2
Mileage: 172195 km
Time Indication: 0
Date: 2022.06.11
Time: 18:03:50

03286 - Sensor for Contact with Door Handle; Front Right
011 - Open Circuit
Freeze Frame:
Raw, Index/Key Err.: 228 079 127
Resistance: 2.3 mOhm
(no units): 166.32
Raw, Index/Key Err.: 234 127 255
Mass/Weight: 1461.5 kg

[3.0ss]

So I replaced the drivers side rear sensor and all was working fine up until today. I did another VAGCOM scan. and it looks like the front passenger right is now going? Is this the same code you guys are used to seeing? I might as well replace the other 3 and buy what you guys recommended in the earlier thread.. Otherwise they are going to go one at a time..

Here is my VAGCOM Scan...
Subsystem 1 - Part No SW: 8K0 905 852 D HW: 8K0 905 852 D
Component: J764 ELV MLB H37 0042
Serial number: 2310000022470009

2 Faults Found:
03286 - Sensor for Contact with Door Handle; Front Right
008 - Implausible Signal
Freeze Frame:
Fault Status: 01101011
Fault Priority: 2
Fault Frequency: 1
Reset counter: 2
Mileage: 172195 km
Time Indication: 0
Date: 2022.06.11
Time: 18:03:50

03286 - Sensor for Contact with Door Handle; Front Right
011 - Open Circuit
Freeze Frame:
Raw, Index/Key Err.: 228 079 127
Resistance: 2.3 mOhm
(no units): 166.32
Raw, Index/Key Err.: 234 127 255
Mass/Weight: 1461.5 kg

Yep replace them all at the same time. Mine did the same thing. At least it’s only $40 for all 4 so might as well swap them all out.

[reecheemun]

Yep rear is the same as the front. When you pop the torx with a screwdriver just give it a gentle tap. I hit one too hard and had to take the door apart to fish it out lol, not fun.

hey i had to take apart the door panel as the bolt/plastic piece fell into the door. how do you get that back into place in the plastic bracket behind the handle? do I need to take off the bracket? ( how do i do that, dont see any bolts). Thanks!!!

[3.0ss]

hey i had to take apart the door panel as the bolt/plastic piece fell into the door. how do you get that back into place in the plastic bracket behind the handle? do I need to take off the bracket? ( how do i do that, dont see any bolts). Thanks!!!

If you mean that little round bolt looking thing with multiple splines on the outside yes you have to remove the whole handle assembly or whatever to press it back in. Once you have the door panel off there's a big black plastic cover on the door, remove that and you'll see the interior skeleton of the door. From there you should see the latch assembly is held in with a few torx I believe.

[NikolaZ]

These sensors tend to fail over time. They are similar for all the cars with keyless entry. I got mine for 25$ from a guy and installed it pretty easy. Aliexpress is full with them.