Hey there. The subject of fixing the corroded rear door triangles was discussed on ASN recently. I used advise from another thread and replaced both triangles. I took pictures and decided to write up this short guide. I hope it helps you to save some time and brain power.
You will need:
A trim removal tool
A torx screwdriver and a wrench. Torx T25, T27 and T45
OEM triangles:
Left: 8P4853273CY9B
Right: 8P4853274CY9B
Clips (because you'll break some. I broke half of them): 8P0 868 243A
Remove the door card. Use the torx T25 for the screws. Watch this video if you don't know how to remove the door card:
Undo these four screws. The #4 is just below the edge of the picture but you won't miss it. Use T25.
On a side of hinges, pull the rubber sills out and undo screws 5 and 6. Use T45 and, perhaps, a wrench as these big screws sit fast.
On a side of the lock, pull the rubber sills out and use T45 to undo screws 7 and 8. You may want to remove two plastic trims from inside of the window frame that cover the lower corner. Just use the trim removal tool to pop them out. Than use T27 for the screw #9.
Now, the upper door frame sit loose, though you still cannot pull it up completely because there are still a few screws that hold a window regulator. You don't need to do anything with those screws, same as you don't need to pull the upper frame out. You can just lift the corner in question enough to get more than enough place to reach the last screw, the one that holds the triangle. Lift the corner of the frame and put something under the frame to keep it in this position. I used the trim removal tool as shown on the picture below.
On the outside of the door, undo the last screw (#10) and slide the triangle down. Be carefull undoing the screw: keep a finger below it in order it not to fall down inside the door.
View without the triangle. Remove dirt and residue of corrosion, put a new triangle and slide it up and screw.
Assembly the door. Pay attention to all the rubber sills, ensure they fit properly.
Enjoy the result.
You will need:
A trim removal tool
A torx screwdriver and a wrench. Torx T25, T27 and T45
OEM triangles:
Left: 8P4853273CY9B
Right: 8P4853274CY9B
Clips (because you'll break some. I broke half of them): 8P0 868 243A
Remove the door card. Use the torx T25 for the screws. Watch this video if you don't know how to remove the door card:
Undo these four screws. The #4 is just below the edge of the picture but you won't miss it. Use T25.
On a side of hinges, pull the rubber sills out and undo screws 5 and 6. Use T45 and, perhaps, a wrench as these big screws sit fast.
On a side of the lock, pull the rubber sills out and use T45 to undo screws 7 and 8. You may want to remove two plastic trims from inside of the window frame that cover the lower corner. Just use the trim removal tool to pop them out. Than use T27 for the screw #9.
Now, the upper door frame sit loose, though you still cannot pull it up completely because there are still a few screws that hold a window regulator. You don't need to do anything with those screws, same as you don't need to pull the upper frame out. You can just lift the corner in question enough to get more than enough place to reach the last screw, the one that holds the triangle. Lift the corner of the frame and put something under the frame to keep it in this position. I used the trim removal tool as shown on the picture below.
On the outside of the door, undo the last screw (#10) and slide the triangle down. Be carefull undoing the screw: keep a finger below it in order it not to fall down inside the door.
View without the triangle. Remove dirt and residue of corrosion, put a new triangle and slide it up and screw.
Assembly the door. Pay attention to all the rubber sills, ensure they fit properly.
Enjoy the result.
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