Problem with 3rd gear

I have a 1992 325i (manual) and the problem is I cannot select 3rd gear when driving. 1st, 2nd, 4th and 5th are fine. But for some reason, I cannot select 3rd. Whenever I try, I get a grinding noise like I'm trying to select a gear without using the clutch.
Any suggestions on what that could be?

I have a 1992 325i (manual) and the problem is I cannot select 3rd gear when driving. 1st, 2nd, 4th and 5th are fine. But for some reason, I cannot select 3rd. Whenever I try, I get a grinding noise like I'm trying to select a gear without using the clutch.
Any suggestions on what that could be?

ur problem is the 3rd syncronizer ring in ur transmission ..its warn and needs to be replaced .......and if ur doing on do them all it one shot deal.
because syncro ging assist in shifting and when warn its hard to shift and gear clashing will happin. good luck man
cheer
bmwe36

Thanks

Do you think that would be an expensive repair, or should I start looking for a new trans.