The silicon rubber un-lock button on my original 2000 buick remote disintegrated and fell apart after years of use exposing the electronic circuit board contact area beneath. With the replacement Dorman Case I managed to salvage a perfectly good key remote for less than 10 bucks. Easy as 1-2-3 and worked perfectly after doing the case switcheroo. If all that's wrong with your old one is a broken case or the silicon rubber button insert and the electronic circuit board inside isn't damaged then save yourself some $$ and get one of these.