automatic transmission reliability in an 03 Z4 3.0L

I've found a locally for sale 2003 Z4 with 140000 miles which finally puts it in my budget range. The body and interior are mint but ideally I was looking for a manual. The main concern I have is the reliability of the automatic. My main experience is late 90 early 2000 VW's where the manual tranny's ran forever and the automatics constantly gave out and were EXPENSIVE to replace.

Before I make this guy an offer, can anybody tell me if the automatic transmissions are as reliable as the manual transmissions? I realize that any car with 140,000 miles is risky, but I can do most of the repairs.

Any advice would be appreciated. Thanks.

automatic transmission reliability in an 03 Z4 3.0L