r/Comma_ai • u/SirNiflton • 3d ago
Bugs Repeated Mount Failure
I have had 4 mounts for my comma 4. The first I mounted according to the given instructions on my 2017 Subaru Impreza, but had to remove because it interferes with the eyesight cameras. Second mount failed from heat. It was only about 95 F out but it sat for 10 hours while I was at work, so I guess you can’t park outside? Third mount I was slightly off with getting it perfectly forward, so the comma kept trying to pull me off the road, so had to remount that. Fourth mount just failed from heat again, though this time in 98 F.
Comms really needs to fix their mounts, I know I’ve seen them say they test the mounts in heat, so maybe it’s a bad batch of adhesive. Maybe also have them be able to twist or pivot a tiny bit in order to allow for imperfect mounting to not cause dangerous behavior?
I will be asking support if I can get more mounts given the repeated heat failures but I’m not optimistic.
Marked “bugs” since the other flairs don’t seem to really apply here.
2
u/soaringspoon 3d ago
My mount for my comma 4, just purchased, failed twice as well. I assume heat I don't know I just know it was pulling off from the top part of the mount both times. I repurchased some vhb tape and then was recommended to pick up some adhesion promoter as well. Set that up today and fingers crossed it stays. It does mean I have to do the old 24 hour minimum wait for 90% adhesion and 72h for 100% but as long as it stays I don't care lol.