Same thing here after checking mine just now. Mine is from the middle to the passenger side rear seat where the bottom is coming off and the softex is not latched to the seat itself. Any chance posting this TSB so it will be easier for us to talk to the dealers?
I went to a Canadian Dealership (Open Road) they fixed it and it's messed up again. They claim there is no CDN TSB for this.
I Go through open road too. This is not good...hopefully enough of us coming in for this issue will allow them to make a TSB for it.
Port Moody?
Richmond. But ill reference your case.
We have had the same problem with our trail, they ordered an entirely new seat cover and it did the same thing the first day the kids got got off of it. They want to take it to a local upholsterer so he could put c-clips on it & personally when I think of c-clips I think to my 1966 Truck that had c-clips holding burlap to the springs... I told them no sir not yet that will tear quickly over time. The dealership recognized it's a problem, just no solution yet.
Did your dealer open a case with Toyota? If they did not, you should have them do so, and keep taking it back every time it comes loose so they can document it for the case.
I've had my new seat cover and different clips on for close to 8 weeks and have had no problems. Have had both adults and squirmy kids on the seat. It really feels fastened down tight now.
I struggled when I bought my TE because I really wanted a sunroof but was really not smitten with the required SofTex. Thus I own a TE not a TEP.
I have a long experience with Toyota cloth seats and I know they hold up forever if given even a modicum of care.
I'll be curious to see how the SofTex seats hold up over the long haul. No offense to those who like them/own them, but I just don't see them having the longevity of cloth and I am certain the brass rivets on my beloved 501's would destroy the bolster on the side when I get in and out of the truck.
I love my 2015 trail cloth seats more and more. I never had a problem with the cloth seats in my 1990 4Runner and I took that thing all over Colorado for all kinds of activities.
Softex just seems kind of poorly implemented. I'd consider leather down the road if I really trash my seats, but for now I have no regrets.