Hereís what I learned when replacing the drivers side door check device on my 2015 Fiat Cinquecento Abarth. It will probably apply to other models, but I canít be sure of that. The posted instructions on the Internet are pretty good, but leave out a couple of steps which might be helpful. Hereís what I did.
I removed the door card in accordance to previously published instructions. My speaker is riveted in so I had to drill out the rivets and remove the speaker. After removing the one bolt and two nuts, I was able to work through the speaker hole and wiggle the old door check out and into the interior of the door, but I could not get it completely out. Raising the window glass was the key and after 30 more minutes of wiggling and cursing I got the old unit out. It suffered a bearing failure and was in very bad shape and, as it turns out, thatís why I could extract it.
I wiggled the new unit around trying in vain to get it into position without success. Unlike the old unit, the new one was not flopping around, so I had trouble getting it into position. Cursing did not help. Eventually I had an ah-ha moment and realized that the forward track of the window mechanism was causing the problem.
I took a knife and carefully cut away the adhesive holding the door insulation free from the door frame along the leading edge. I used a long snap-knife fully extended and great care not to damage the insulation. When I was done, I was able to press it back into place and the adhesive I cut, resealed nicely.
Above the speaker hole there are two nuts securing the forward glass guide. I backed them off but I did NOT remove them. That gave me enough slack to immediately wiggle the new part into position without difficulty. I re-tightened the window guide nuts as well as the door check nuts and bolt.
I used pop rivets to reinstall the speaker. Youíll need fairly long, large diameter ones. I suppose you could use some sheet metal screws to secure the speaker.
Re-installing the door card was straight forward until I tried to connect the window adjustment connector. I pushed up too hard and the adjustment module popped out, hit the floor, came apart, and tiny parts flew all over the floor. I was able to find all of them, re-construct the switch, and get everything back together. Before closing everything up, I tested the mirror adjust switch module and was relieved to see that it worked OK. The second time I used more care with the electrical connector and was able to finish the job without further drama.
Bottom line: Right away after getting the door card off, carefully peel back the leading edge of the door insulation and loosen the two nuts holding the forward glass guide without removing them completely. That step will save an hour of wasted time and several hundred curse words. When you re-connect the mirror adjust electrical connector, use some care not to push too hard. Otherwise, changing the door check device is easy following these tips along with several DIY posts you can find on the Internet.