Bought mine new with 31 miles on it, now after 13 years back driver side leaks when it rains. Tried black rtv in the roof division fissure but it didn’t work. What is the culprit? How much to fix? Anyone else have this problem?

 

Does it have a sunroof? Might be dirt/debris accumulation in the sunroof drains.

Easiest way to find it is to either sit it in and watch when it's raining - or to pour water on it when it's dry and try to watch where the water comes in from.

 

it does have a sunroof, but the leak is hard to find, somewhere behind the plastic wall on your left if you're sitting in the rear driver seat
i dont have compressed air to clean the sunroof pipes if it is that

 

You don't necessarily need compressed air. Finding the drain would help. I don't know what they look like on these, but on other cars, I've seen them as rubber nozzles, and that's actually where the clog happens.

 

99% the drain I had this issue. I opened the sunroof and blew compressed air into the corners of the holes. Just be careful you don't pop the tube off like I did apparently.