Finally got around to installing the Helix sub and amp. Install was very straight forward. Took me a total of 2 hours. My first impression is it sounds great! At least for radio and bluetooth. Way more mids and lows. You can really feel the bass but not in an obnoxious way. Overall volume is also louder. I'm very impressed. Audio through my phone vis Apple Carplay while louder sounds worse than stock. I haven't programed it with the dongle yet but it sounds like that should fix it. Here are everything I've used. The instructions that came from VW was super confusing. I didn't even touch it.
- VW head unit removal tool (amazon)
- Trim removal tool (amazon)
- Connector pin removal tool (amazon)
- Trim removal instructions:
https://www.youtube.com/watch?v=6dKJtnaV9CU&t=318s
- Wiring instructions:
https://www.youtube.com/watch?v=59bKOruoJys
- Instructions on how to mount the sub w/ the spare:
https://www.golfmk7.com/forums/showthread.php?t=31070
- Dongle rental thread:
https://www.golfmk7.com/forums/showthread.php?t=45767
A few notes of my own. All the tools are definitely helpful. The head unit removal tool and pin removal tool is a must. Trim removal tool is not necessary but nice to have.
In the video, it showed removing the entire rear seat bottom. That is not necessary. I did not do that. Just popped it up high enough so I can access the rear passenger door sill and feed the harness to the trunk.
Disconnecting the battery is not necessary but recommended. I didn't do it because I knew what I needed to avoid doing. If you watch the video I linked, you will see why disconnecting the battery is a nice safety net.
When running the harness, start with the amp connector and feed it through the glove box and then from the front of the car to the rear. Don't go from rear to front. Also when feeding the harness through the glove box, make sure to go up and over the head unit railing. If you go through the side, the head unit will not fit back into the glove box. It will pinch the wiring harness and the head unit won't go back in all the way.
Photo of all the passenger trim pieces pulled apart.
Photo of using the head unit removal tool to pull the head unit out. Glove box is dropped downed.
Head unit is out!
Harness wired to the head unit.
You can see here the wiring harness runs back and up over the head unit railing.
From the side of the glove box. You can see the harness running over the head unit railing.
When putting the trim pieces back together, start with the passenger L shape floor piece you see here.
Then the thin wavy side trim piece.
And finally the side glove box panel.
Then you can do the front passenger and rear passenger door sill trims.
Helix sub sitting on top of the spare.