Because existing sources of auto reliability information left much to be desired, in late 2005 I started conducting my own reliability research at TrueDelta.com. TrueDelta reports absolute stats like "trips to the shop" that make the differences between cars much clearer. Results are updated four times a year, so it's possible to provide reliability information on new models quickly. Also, any significant changes in a model's reliability become apparent quickly.

I've started collecting data on the 2007, and might have an initial result on that year in February. Very close to getting started on the 2005 as well--just a few owners short of the minimum sample size.

Participants simply report repairs the month after they occur on a one-page survey. When there are no repairs, they simply report an approximate odometer reading four times a year, at the end of each quarter.

To encourage participation, panel members will receive full access to the results for free.

For the details, and to sign up to help out:

Auto reliability research

Updated full result in August for the 2007. Still need more participants to include other years.

Reliability for the 2007 has improved to average in the most recent results.

Still not enough participants for other years, but getting close.

To get your year included:

Car reliability research