I successfully added ACC to my 2022 992 Cab S. These steps should be the same for any 992 that has a Triptronic tranny (ACC does not work with manual trans).
Here is the parts list:
I acquired all of the Porsche parts used on eBay, which saved a significant amount of money. If you buy a used ACC sensor on eBay make sure it comes with the mounting bracket. You can’t purchase the bracket separately from Porsche – it only comes with the sensor.
Depending on which options your vehicle already has, you may not need some of these parts. For example, the ZFAS controller (on the rear wall of the frunk) comes in two basic versions: 108 and 117. If you have Lane Change Assist or Surround Vision, you probably already have the 117 Zfas version. The same goes for the ABS pump in the upper front left wheel well. LCA and SV typically include the right versions of the ABS pump for adding ACC. You can read the number printed on the top of the ABS pump. While the part number embossed on the pump is different than the Porsche part number, the letter suffix will match that of the part number. For example, mine was AC, as my car had neither LCA or SV (both of which I also added to the car, but more on that in a separate post). So I had to change my ABS pump to get ACC to work.
Getting the right steering column switch can be quite challenging, as there are dozens of versions depending on which options you 992 came with. The ACC version has a distance switch added to the cruise control stalk arm. I also added a heated wheel to this car, which was also a different version of the column switches.
The most accurate way to identify the correct version of the steering column controls (and other parts as well) is to get a subscription to partslink24.com. It’s the system most Porsche parts departments use. It matches part versions to the vehicle VIN, but also shows the other versions of the same part for different vehicle option combinations grayed out along with the versions for your vehicle in black. I go to online car selling sites like Autotrader, find another 992 that has the options I want to add, enter its VIN into partslink, and start comparing which parts are different. This works most all of the time, but I often missed non-obvious parts differences (like the ABS pump for adding ACC) until I did the install and discovered issues.
You need to remove the front bumper to install the ACC sensor. The sensor installs with two M6 screws into two holes on the lower face of the crash bar. While the holes are there, you will need to install two M6 rivet nuts in the holes for the screws (Amazon has low cost rivnut sets). Once the sensor is installed, you need to cut the plastic away from the sensor location in the center plastic bumper grill. This will involve a bit of trial and error, but the plastic cover for the ACC will cover any small gaps you leave. You can also order a replacement grill designed for ACC (partslink will have the number), but I found that it is easy enough to just trim the existing grill piece as the only difference is the opening for the ACC sensor.
If you have to upgrade your Zfas module from 108 to 117 (which I had to do), you are going to need a new connector for the module. The same connector style is used on multiple modules in the car. Or just buy a used 117 Zfas module on eBay that includes the connector that was cut off by the dismantler. That is the best option as it will include the pins you will need for the wiring changes.
The wiring changes are not that significant for adding ACC (as opposed to LCA and SV, which involve lots of new wiring). The ACC module is wired in series on the flexray bus between the Zfas module and the ABS pump. You also need to add an additional flexray connection between the Zfas module and the Gateway (located in the lump between the rear seats).
Once the wiring changes are done, it's off to you cooperative Porsche dealer who will log into his PIWIS system, go into the section for selecting the options for your vehicle, and change the cruise control setting from 8T1 to 8T3. If you have LCA, he will need to change this to the LCA version that includes “traffic.” He will also need to clear component protection for the parts you changed. Note that both of these functions require a real Porsche dealer subscription – you cannot do either with a clone PIWIS system.
The final step is having the dealer calibrate the ACC sensor. This involves the use of specialized equipment that not all dealers possess. You can't skip this step. The ACC software requires calibration on the car it is installed in.
If you want to go down this route, feel free to reach out to me for details or assistance. Note that I don’t think you will be able to get a Porsche dealer to do the work for you, as having never done it means they won’t want to take the risk. As for whether this violates the vehicle warranty, I don’t know. You are not modifying any factory parts, or adding parts that weren’t made by Porsche. They probably won’t warranty the newly added ACC system, but I don’t think they can deny you the right to modify your car so long as it is not a contributing factor to whatever you are attempting to get warranty coverage for.
Good luck! Ill post details on my other additions as well.
Here is the parts list:
| 992907561D | Radar Sensor | |
| 992907225A OK1 | Sensor Cover | |
| 992953502FE HUO | Steering column switches ACC Heated wheel | |
| PAD907117H / 4K4 | Zfas control module for ACC | |
| eBay | Zfas cable | |
| Aliexpress | Radar sensor cable | |
| 992698517 AE, AN, R | ABS pump for ACC |
I acquired all of the Porsche parts used on eBay, which saved a significant amount of money. If you buy a used ACC sensor on eBay make sure it comes with the mounting bracket. You can’t purchase the bracket separately from Porsche – it only comes with the sensor.
Depending on which options your vehicle already has, you may not need some of these parts. For example, the ZFAS controller (on the rear wall of the frunk) comes in two basic versions: 108 and 117. If you have Lane Change Assist or Surround Vision, you probably already have the 117 Zfas version. The same goes for the ABS pump in the upper front left wheel well. LCA and SV typically include the right versions of the ABS pump for adding ACC. You can read the number printed on the top of the ABS pump. While the part number embossed on the pump is different than the Porsche part number, the letter suffix will match that of the part number. For example, mine was AC, as my car had neither LCA or SV (both of which I also added to the car, but more on that in a separate post). So I had to change my ABS pump to get ACC to work.
Getting the right steering column switch can be quite challenging, as there are dozens of versions depending on which options you 992 came with. The ACC version has a distance switch added to the cruise control stalk arm. I also added a heated wheel to this car, which was also a different version of the column switches.
The most accurate way to identify the correct version of the steering column controls (and other parts as well) is to get a subscription to partslink24.com. It’s the system most Porsche parts departments use. It matches part versions to the vehicle VIN, but also shows the other versions of the same part for different vehicle option combinations grayed out along with the versions for your vehicle in black. I go to online car selling sites like Autotrader, find another 992 that has the options I want to add, enter its VIN into partslink, and start comparing which parts are different. This works most all of the time, but I often missed non-obvious parts differences (like the ABS pump for adding ACC) until I did the install and discovered issues.
You need to remove the front bumper to install the ACC sensor. The sensor installs with two M6 screws into two holes on the lower face of the crash bar. While the holes are there, you will need to install two M6 rivet nuts in the holes for the screws (Amazon has low cost rivnut sets). Once the sensor is installed, you need to cut the plastic away from the sensor location in the center plastic bumper grill. This will involve a bit of trial and error, but the plastic cover for the ACC will cover any small gaps you leave. You can also order a replacement grill designed for ACC (partslink will have the number), but I found that it is easy enough to just trim the existing grill piece as the only difference is the opening for the ACC sensor.
If you have to upgrade your Zfas module from 108 to 117 (which I had to do), you are going to need a new connector for the module. The same connector style is used on multiple modules in the car. Or just buy a used 117 Zfas module on eBay that includes the connector that was cut off by the dismantler. That is the best option as it will include the pins you will need for the wiring changes.
The wiring changes are not that significant for adding ACC (as opposed to LCA and SV, which involve lots of new wiring). The ACC module is wired in series on the flexray bus between the Zfas module and the ABS pump. You also need to add an additional flexray connection between the Zfas module and the Gateway (located in the lump between the rear seats).
Once the wiring changes are done, it's off to you cooperative Porsche dealer who will log into his PIWIS system, go into the section for selecting the options for your vehicle, and change the cruise control setting from 8T1 to 8T3. If you have LCA, he will need to change this to the LCA version that includes “traffic.” He will also need to clear component protection for the parts you changed. Note that both of these functions require a real Porsche dealer subscription – you cannot do either with a clone PIWIS system.
The final step is having the dealer calibrate the ACC sensor. This involves the use of specialized equipment that not all dealers possess. You can't skip this step. The ACC software requires calibration on the car it is installed in.
If you want to go down this route, feel free to reach out to me for details or assistance. Note that I don’t think you will be able to get a Porsche dealer to do the work for you, as having never done it means they won’t want to take the risk. As for whether this violates the vehicle warranty, I don’t know. You are not modifying any factory parts, or adding parts that weren’t made by Porsche. They probably won’t warranty the newly added ACC system, but I don’t think they can deny you the right to modify your car so long as it is not a contributing factor to whatever you are attempting to get warranty coverage for.
Good luck! Ill post details on my other additions as well.
