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  1. Splitting roof seams near back window, water leaking into rear quarter panels

    Ford agreed to pay for most of the repair to my car. Out of pocket will be around $250. I'm not sure if they will do anything to prevent it from recurring though....whether they will be using a better seam sealer, placing tack welds or injecting panel adhesive between the moving seams. I plan...
  2. Splitting roof seams near back window, water leaking into rear quarter panels

    Next time you wash the car, stand there and spray water at the cracks for a few minutes on each side, then look for water in the trunk quarters/saddles. Mine doesnt look much worse, but leaks like a seive.
  3. Splitting roof seams near back window, water leaking into rear quarter panels

    Im still waiting to hear from ford. I opened a case using their 1-800 number (sorry, dont have it on hand). Then I had to take it to the dealer and have them "find" the leak for 100 bucks, even though I had already found it myself; a necessary step to document the issue for the case. If ford...
  4. Splitting roof seams near back window, water leaking into rear quarter panels

    I didnt find much online either, other than a rare mention here or there, mostly from people who didnt even see or know about it, but only knew the dealer pulled the glass to fix seams. Thats why I started this thread, because it wasn't mentioned much or even known. Once I knew what to look for...
  5. Splitting roof seams near back window, water leaking into rear quarter panels

    I'm pretty disappointed too. I saved up a long time to buy this car, and kept my last mustang for 13 years. I was not expecting this issue at all. Ford messed up in this area. Definately not something we should have to deal with on newer cars. Im afraid even if they do repair it, it will just...
  6. Splitting roof seams near back window, water leaking into rear quarter panels

    Heres the 2017 ecoboost....looks like a long crack spreading up the drip-rail.
  7. Splitting roof seams near back window, water leaking into rear quarter panels

    I think all s550 mustangs will have this at some point in their life, just a matter of when. Poor design or poor execution, either way I'd call it a defect. Ive owned 6 mustangs and never had an issue like this before, and I'm talking about 10-30+ year old cars.
  8. Splitting roof seams near back window, water leaking into rear quarter panels

    I didnt even realize they split at the bottom too, but yeah...your car definately has it. I would get it to the dealer while still under warranty.
  9. Splitting roof seams near back window, water leaking into rear quarter panels

    Im starting to wonder if they even weld these panels together or if it is all just panel adhesive....letting everything move around and split apart.
  10. Splitting roof seams near back window, water leaking into rear quarter panels

    This is the white 2017 ecoboost I mentioned earlier. Has split seams like mine and cracking on the painted body surface, outside of the seam sealer. Will get more pics once its cleaned up. Ive seen a gt350 that had this continue up into the drip rail 1/4-1/2 inch on each side on the actual...
  11. Splitting roof seams near back window, water leaking into rear quarter panels

    And as far as the best test, you would want to pull the trunk panels to look in the sides, just behind the wheel wells. This means pulling off the rearmost plastic panel, followed by the carpeted side panels. The side dont have to be fully removed, just pull two of the plastic clips and swing...
  12. Splitting roof seams near back window, water leaking into rear quarter panels

    To clarify, my car has not been garaged. It is my daily driver in sunny south florida. No snow, but plenty of heat...especially on a black car. Still waiting to hear back from ford (foMoCo, not the dealer). If ford covers it, the dealer will perform the repair.
  13. Splitting roof seams near back window, water leaking into rear quarter panels

    Also...anyone checking, water won't necessarily be in the spare wheel well. It runs down the c pillars and fill the areas behind the side trunk trim panels.
  14. Splitting roof seams near back window, water leaking into rear quarter panels

    Thank you both. I did check the third brake light. The headliner is held on in the back with magnets, pops down a few inches to access the antenna and brake light. Both are dry. I found the cracks myself by blowing compressed air around inside with someone spraying soapy water outside and...
  15. Splitting roof seams near back window, water leaking into rear quarter panels

    It's not the glass, it's the body seams. I haven't seen it on a 2018-20 car, but I also haven't looked yet. I'm not sure if there was a materials change or if it simply takes time and many cycles of the sheet metal expanding and contracting with the sun. Being black, mine gets pretty hot. I...
  16. How many mustangs have you owned?

    Every car I've ever owned: 87 gt hatch w/ t-tops 89 lx hatch 93 lx hatch 99 gt coupe 00 gt coupe 16 gt coupe Honorable mention: The only car I've owned that wasnt a mustang and also the only car that had an automatic transmission. The eventual teksid block donor for my 00 gt; 93 lincoln Mark viii
  17. Splitting roof seams near back window, water leaking into rear quarter panels

    Sorry, I realize the pictures can be hard to place. Bikeman315 is correct, and thank you for helping to clarify. The repair is removing the rear glass to remove and replace the existing seam sealer and repaint the area. It is problem area obviously, and I want everyone to know about it. I...


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