We've updated our reliability stats for the IS to include owner experiences through December 31, 2013.
Repair frequencies, in terms of repair trips per 100 cars per year:
2008 IS: 40, low, small sample size
2007 IS: 40, low
2006 IS: 17, low, small sample size
2002 IS: 12, low, very small sample size
We'll have further updates in May and in August. The more owners participate, the more comprehensive and precise these will be.
To see the repairs behind these stats, and to sign up to help improve this information:
Lexus IS reliability ratings and comparisons