Thank you for your reply.
the weather strip is cosmetic only. Even if removed, water will not leak…
I already bought the part, cost me 112$.
the thing is, the weather strip attached with double sided glue to the fixed rear glass, and the gap is tight.
I went to glazier that told me he will have to remove the fixed glass to fix it. And it will be around 800$.
so if anyone done the repair by himself, without removing the fixed glass ( removing the sliding one takes 5 min ), would appreciate some tips and tricks