TrueDelta updates actual repair frequencies, not just dots, four times a year to track cars' reliability closely as they age.

Participants simply report repairs quarterly on a one-page survey. No repairs? Then the response is little more than an approximate odometer reading.

I'll share updated stats in this thread once we have them.

The more owners participate, the more precise the stats will be. To encourage participation, participants receive full access to all results for free.

For the details, and to sign up to help:

http://www.truedelta.com/join

 

We have updated our reliability stats for the Mazda3 and MazdaSpeed3 to include owner experiences through December 31, 2012.

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

2012 Mazda3: 9, low

2012 MS3: no repairs reported, but only 15 cars (especially need more of these!)

2011 Mazda3: 21, low

2011 MS3: 27, low, very small sample size (need more of these, too!)

2010 Mazda3: 14, low

2010 MS3: 9, low

2008.5-
2009 Mazda3: 27, low

2008.5-
2009 MS3: 49, moderate

2008 Mazda3: 29, low

2008 MS3: 41, low, small sample size

2007 Mazda3: 51, moderate

2007 MS3: 75, moderate, small sample size

2006: 75, moderate

2005: 55, moderate

2004: 52, 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.

These stats require more data. We received enough responses for the following years, the regular Mazda3 in all cases:

2011: 79, < 1

2010: 88, < 1

2009: 82, < 1

2008: 78, < 1

2007: 58, 2

2006: 57, 8

2005: 60, 4

Thank you, once again, everyone who has been helping. We'll have further updates in May and August. The more owners participate, the more precise these will be.

Details, including descriptions of all reported repairs and scores for competitors:

Mazda Mazda3 reliability ratings and comparisons

 

We've updated our reliability stats for the Mazda3 to include owner experiences through March 31, 2013.

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

2012 Mazda3: 7, low
2012 MazdaSpeed3: 0, low, small sample size
2011 Mazda3: 13, low
2010 Mazda3: 16, low
2010 MazdaSpeed3: 16, low
2009 Mazda3: 25, low
2009 MazdaSpeed3: 44, moderate
2008 Mazda3: 33, low
2008 MazdaSpeed3: 37, low, small sample size
2007 Mazda3: 58, moderate
2007 MazdaSpeed3: 66, moderate, small sample size
2006 Mazda3: 67, moderate
2005 Mazda3: 73, moderate
2004 Mazda3: 60, 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:

2012 Mazda3: 93, < 1
2011 Mazda3: 85, < 1
2010 Mazda3: 84, < 1
2009 Mazda3: 80, < 1
2008 Mazda3: 73, < 1
2007 Mazda3: 57, < 1
2006 Mazda3: 61, 3
2005 Mazda3: 50, 4

We'll have further updates in August and in November.

For the details, including the descriptions of reported repairs, and to sign up to help improve this information:

Mazda Mazda3 reliability ratings and comparisons

 

We've updated our reliability stats for the Mazda3 to include owner experiences through June 30, 2013. (Another source is about 14 months behind.)

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

2013 Mazda3: 0, low, small sample size
2012 Mazda3: 7, low
2012 MazdaSpeed3: 0, low, small sample size
2011 Mazda3: 14, low
2011 MazdaSpeed3: 0, low, very small sample size
2010 Mazda3: 15, low
2010 MazdaSpeed3: 5, low
2009 Mazda3: 33, low
2009 MazdaSpeed3: 50, moderate, small sample size
2008 Mazda3: 43, low
2008 MazdaSpeed3: 19, low, small sample size
2007 Mazda3: 54, moderate
2007 MazdaSpeed3: 47, moderate, small sample size
2006 Mazda3: 64, moderate
2005 Mazda3: 78, moderate
2004 Mazda3: 59, 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:

2012 Mazda3: 92, < 1
2011 Mazda3: 83, < 1
2010 Mazda3: 83, 1
2009 Mazda3: 71, < 1
2008 Mazda3: 65, < 1
2007 Mazda3: 58, < 1
2006 Mazda3: 54, 3
2005 Mazda3: 40, 4

We'll have further updates in November and February.

To view competitors' scores and descriptions of reported repairs, and to sign up to help:

Mazda Mazda3 reliability ratings and comparisons

 

We've updated our reliability stats for the Mazda3 to include owner experiences through September 30, 2013.

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

2013 Mazda3: 0, low
2012 Mazda3: 13, low
2012 MazdaSpeed3: 0, low, small sample size
2011 Mazda3: 10, low
2010 Mazda3: 19, low
2010 MazdaSpeed3: 11, low, small sample size
2009 Mazda3: 45, moderate
2009 MazdaSpeed3: 43, low, small sample size
2008 Mazda3: 39, low
2008 MazdaSpeed3: 29, low, small sample size
2007 Mazda3: 60, moderate
2007 MazdaSpeed3: 48, low, small sample size
2006 Mazda3: 76, moderate
2005 Mazda3: 74, moderate
2004 Mazda3: 58, 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:

2012 Mazda3: 90, < 1
2011 Mazda3: 89, < 1
2010 Mazda3: 81, < 1
2009 Mazda3: 71, 3
2008 Mazda3: 68, < 1
2007 Mazda3: 54, 2
2006 Mazda3: 50, 6
2005 Mazda3: 52, 4

We'll have further updates later this month and in May. The more owners participate, the more comprehensive and precise these will be.

To see how competitors compare, and to sign up to help improve this information:

Mazda Mazda3 reliability ratings and comparisons

 

We've updated our reliability stats for the Mazda3 to include owner experiences through December 31, 2013.

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

2013 Mazda3: 0, low
2012 Mazda3: 11, low
2012 MazdaSpeed3: 15, low, small sample size
2011 Mazda3: 16, low
2010 Mazda3: 23, low
2010 MazdaSpeed3: 18, low, small sample size
2009 Mazda3: 39, low
2009 MazdaSpeed3: 32, low, small sample size
2008 Mazda3: 45, moderate
2008 MazdaSpeed3: 38, low, small sample size
2007 Mazda3: 59, moderate
2007 MazdaSpeed3: 35, low, small sample size
2006 Mazda3: 68, moderate
2005 Mazda3: 89, moderate
2004 Mazda3: 59, 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:

2012 Mazda3: 90, < 1
2011 Mazda3: 85, < 1
2010 Mazda3: 81, < 1
2009 Mazda3: 66, < 1
2008 Mazda3: 63, < 1
2007 Mazda3: 55, 2
2006 Mazda3: 52, 6
2005 Mazda3: 43, 4

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:

Mazda Mazda3 reliability ratings and comparisons

 

Our reliability stats for the Mazda3 now include owner experiences through March 31, 2014, making them nearly a year ahead of other sources.

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

2014 Mazda3: 10, low
2013 Mazda3: 0, low
2012 Mazda3: 14, low
2012 MazdaSpeed3: 15, low, small sample size
2011 Mazda3: 18, low
2010 Mazda3: 21, low
2010 MazdaSpeed3: 20, low, small sample size
2009 Mazda3: 41, low
2009 MazdaSpeed3: 30, low, small sample size
2008 Mazda3: 38, low
2008 MazdaSpeed3: 29, low, small sample size
2007 Mazda3: 46, low
2007 MazdaSpeed3: 89, high, small sample size
2006 Mazda3: 61, moderate
2005 Mazda3: 82, moderate
2004 Mazda3: 60, 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:

2012 Mazda3: 90, < 1
2011 Mazda3: 83, < 1
2010 Mazda3: 84, < 1
2009 Mazda3: 80, 4
2008 Mazda3: 68, < 1
2007 Mazda3: 58, < 1
2006 Mazda3: 51, 3
2005 Mazda3: 47, 7

Thank you, once again, everyone who has been helping. Next update in August.

For a deeper dive, including the stats for other cars and repair descriptions, and to sign up to help improve this information:

Mazda Mazda3 reliability ratings and comparisons

 

We've updated our reliability stats for the Mazda3 to include owner experiences through June 30, 2014.

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

2014 Mazda3: 5, low
2013 Mazda3: 6, low
2012 Mazda3: 14, low
2012 MazdaSpeed3: 23, low, small sample size
2011 Mazda3: 24, low
2010 Mazda3: 15, low
2010 MazdaSpeed3: 27, low, small sample size
2009 Mazda3: 24, low
2009 MazdaSpeed3: 14, low, small sample size
2008 Mazda3: 27, low
2008 MazdaSpeed3: 31, low, very small sample size
2007 Mazda3: 48, low
2007 MazdaSpeed3: 98, high, small sample size
2006 Mazda3: 58, moderate
2005 Mazda3: 67, moderate
2004 Mazda3: 64, 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 Mazda3: 92, < 1
2012 Mazda3: 89, < 1
2011 Mazda3: 79, < 1
2010 Mazda3: 86, < 1
2009 Mazda3: 80, 4
2008 Mazda3: 73, < 1
2007 Mazda3: 56, < 1
2006 Mazda3: 63, 3
2005 Mazda3: 55, 4

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:

Mazda Mazda3 reliability ratings and comparisons

 

We've updated our reliability stats for the Mazda3 to include owner experiences through September 30, 2014.

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

2014 Mazda3: 9, low
2013 Mazda3: 6, low
2012 Mazda3: 11, low
2012 MazdaSpeed3: 38, moderate, small sample size
2011 Mazda3: 25, low
2010 Mazda3: 23, low
2010 MazdaSpeed3: 20, low, small sample size
2009 Mazda3: 21, low
2009 MazdaSpeed3: 31, low, small sample size
2008 Mazda3: 40, low
2008 MazdaSpeed3: 47, low, very small sample size
2007 Mazda3: 43, low
2007 MazdaSpeed3: 104, high, small sample size
2006 Mazda3: 61, moderate
2005 Mazda3: 68, moderate
2004 Mazda3: 96, 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 Mazda3: 93, < 1
2012 Mazda3: 92, < 1
2011 Mazda3: 77, < 1
2010 Mazda3: 79, < 1
2009 Mazda3: 81, 4
2008 Mazda3: 69, 2
2007 Mazda3: 67, < 1
2006 Mazda3: 62, < 1
2005 Mazda3: 44, < 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):

Mazda Mazda3 reliability ratings and comparisons

 

We've updated our reliability stats for the Mazda3 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 Mazda3: 8, low
2014 Mazda3: 24, low
2013 Mazda3: 9, low
2013 MazdaSpeed3: 33, moderate, very small sample size
2012 Mazda3: 12, low
2012 MazdaSpeed3: 7, low, small sample size
2011 Mazda3: 7, low
2010 Mazda3: 15, low
2010 MazdaSpeed3: 20, low, very small sample size
2009 Mazda3: 38, low
2009 MazdaSpeed3: 45, low, small sample size
2008 Mazda3: 63, moderate
2007 Mazda3: 72, moderate
2007 MazdaSpeed3: 71, moderate, small sample size
2006 Mazda3: 80, moderate
2005 Mazda3: 89, moderate
2004 Mazda3: 91, moderate, small sample size

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:

2015 Mazda3: 94, < 1
2014 Mazda3: 84, < 1
2013 Mazda3: 90, < 1
2012 Mazda3: 86, < 1
2011 Mazda3: 92, < 1
2010 Mazda3: 86, 2
2009 Mazda3: 81, 4
2008 Mazda3: 54, 3
2007 Mazda3: 49, 8
2006 Mazda3: 57, 8

We'll have further updates in May and in August. The more owners participate, the more comprehensive and precise these will be.

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

Mazda Mazda3 reliability ratings and comparisons