I wanted more up-to-date car reliability information that made the differences between cars clearer. So a few years ago I started getting people together to make this possible. TrueDelta now updates actual repair frequencies, not just dots, four times a year, to track cars closely as they age.

Thanks to the (much appreciated) help of this forum, we've been providing stats for most Nissan and Infiniti models.

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, following the end of each quarter.

To encourage participation, participants receive full access to all results, not just those for the Altima, for free. I'll share results for the Altima in this thread after each update.

http://www.truedelta.com/join

We've updated our reliability stats for the Altima to include owner experiences through December 31, 2013.

Repair frequencies, in terms of repair trips per 100 cars per year:

2013 Altima: 52, moderate

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:

2013 Altima: 58, < 1

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:

Nissan Altima reliability ratings and comparisons

We've updated our reliability stats for the Altima to include owner experiences through June 30, 2014.

Repair frequencies, in terms of repair trips per 100 cars per year:

2014 Altima: 42, moderate, small sample size
2013 Altima: 50, moderate

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:

2013 Altima: 65, < 1

Next updates in November and in February. The more owners participate, the more comprehensive and precise these will be.

For repair descriptions, the stats of other cars, and to sign up to help improve this information:

Nissan Altima reliability ratings and comparisons

We've updated our reliability stats for the Altima to include owner experiences through September 30, 2014.

Repair frequencies, in terms of repair trips per 100 cars per year:

2014 Altima: 43, moderate
2013 Altima: 35, moderate

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:

2013 Altima: 75, < 1

Additional participants always helpful (especially if you see "small sample size" next to the year, or no stat at all).

To view the repairs behind these numbers, check the stats for other cars, and sign up to help improve this information (next update in February):

Nissan Altima reliability ratings and comparisons

We've updated our reliability stats for the Altima to include owner experiences through the end of 2015, about eight months ahead of other sources. In terms of repair trips per 100 cars per year--lower is better:

2015 Altima: 20, low, small sample size
2014 Altima: 43, moderate
2013 Altima: 26, 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:

2013 Altima: 85, 2

No stat, or a small sample size? Then we especially need more owners involved for that model year.

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

Nissan Altima reliability ratings and comparisons