So, how have these cars been doing lately?
Our reliability stats for the xB now include owner experiences through March 31, 2015. (Others are nearly a year behind.) In terms of repair trips per 100 cars per year ("low" is best):
2009 xB: 15, low, small sample size
2008 xB: 18, low
No stat for a model year? Then we very much need more participants for it. Same for those with small sample size notes. Next updates in late August and November.
For repair descriptions, the stats for other cars, and to sign up to help improve this information:
Scion xB reliability