A postcard size ad ended up falling down the driver's side window frame. I was wondering if it could cause a problem down the road?

 

Probably depends on the what the ad was...

 

Highly unlikely it will cause any issues. Does the window go up & down ok? if so, sit back & relax.

 

If it hopefully falls all the way to the bottom of the door cavity and not in the windows operating mechanism or glass tracks, it will eventually get wet. Then as it deteriorates it will smell bad for a while. After that it will start to decompose and eventually when some service is needed in the door someone will see the decomposed remains of what was once might have been the winning lotto number on that post card. LOL




kidding.... somewhat lol

 

Fascinating.

 

I am sure a few of us have some interesting stories of things found at the bottom of door cavities... LOL