Window molding disingrating on Toyota Corolla

Problem Data
Average mileage: 99,980 (50,000–165,000)
3 model years affected: 2001, 2004, 2009
15 people reported this problem
Viewing 1 - 10 of 10 comments
Same issue here. It's happening on the passenger side of the car on both the front and back door windows. I pulled the cracked, broken, sticky strip off and cleaned the area with a small flat head screw driver, alcohol and a rag. I'm considering not replacing it due to the cost. My questions is whether this strip of molding is merely cosmetic or does it serve a purpose? Even if a little water gets into the door, it should just drain right out through the holes on the bottom of the door.
Passenger rear window molding is cracking, and falling inside the door. It has not been replaced yet.
The side molding on all window either cracked or broke off.
On January 2016 I have replaced all the side molding it cost $204 in part and $46 for 1 hour of labor (it took less than 15 min for the actual work) at Service King.
Parts required for the repair:
Front Right : 7571002210
Front Left: 7572002210
Rear Right: 7573002190
Rear Left: 7574002190
The plastic material of the original side molding didn't last more than 7 years of exposure to the sun and rain of south Texas.
I put some Armour on all the rubber along windows and doors.
Seems to have extended their life for a while anyways.
Noticed one morning when opening my door that the molding at the base of the driver's side window was cracked in half on the front and rear door, allowing rain to get inside the door. This is not covered by the extended warranty, and cost $150/window for the dealer to replace.