The lid latch broke on my wife's 2019 Flex. After reviewing some other BTDT repair threads here and elsewhere, I decided to fix ours to hopefully have a more permanent solution (rather than buying a replacement only to have it eventually fail in the same way).
My solution uses M4 jack nuts and an M4 rivet nut. The lid failed in two ways that have been documented in other threads: one of the screw bosses on either side of the latch broke off, and the arms that hold the pivot for the latch also broke.
I removed the upholstery staples and peeled back the leading edge of the lid's covering and padding (the jack nuts are seen in place in this image).I removed what was left of the broken screw boss and also removed the other boss on the other side of the latch just to make an even solution. Then I drilled the holes for the M4 Jack Nuts to match the position of the original screw bosses. Those bosses are about 12mm tall, so I positioned the jack nuts to match that height.I used hot-melt glue to secure the jack nuts and keep them from deflecting over time. I had first thought about using JB Weld, but that seems overkill in this application with the jack nuts.Then I added a rivet nut that is used to hold the latch tension spring in place.I decided to flip the latch spring around. The original position provides a lot of tension - and it may be part of what contributes to the eventual failure. Re-orienting the spring to this position allows for enough tension to hold the lid closed and provide a good spring action to the latch, but puts less strain on the lid.
My solution uses M4 jack nuts and an M4 rivet nut. The lid failed in two ways that have been documented in other threads: one of the screw bosses on either side of the latch broke off, and the arms that hold the pivot for the latch also broke.
I removed the upholstery staples and peeled back the leading edge of the lid's covering and padding (the jack nuts are seen in place in this image).