We've updated our reliability stats for the G to include owner experiences through June 30, 2016. Repair frequencies, in terms of repair trips per 100 cars per year (lower is better):

2006 G: 59, moderate
2005 G: 82, moderate
2004 G: 82, moderate
2003 G: 51, low

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2006 G: 57, 3
2004 G: 39, < 1
2003 G: 58, < 1

For the repairs behind these stats, reliability information on other models, and to sign up to help improve this information:

Infiniti G reliability ratings and comparisons