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

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

2006 STS: 44, low, very small sample size
2005 STS: 100, high, very small sample size

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:

Cadillac STS reliability ratings and comparisons

We've updated our reliability stats for the STS / STS-V to include owner experiences through June 30, 2013.

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

2005 STS / STS-V: 87, moderate, very small sample size

We'll have further updates in November and February.

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

Cadillac STS / STS-V reliability ratings and comparisons

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

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

2005 STS: 74, moderate, very small sample size

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:

Cadillac STS reliability ratings and comparisons

We've updated our reliability stats for the STS / STS-V to include owner experiences through December 31, 2013.

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

2005 STS / STS-V: 55, 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:

Cadillac STS / STS-V reliability ratings and comparisons

We've updated our reliability stats for the STS / STS-V to include owner experiences through June 30, 2014.

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

2005 STS / STS-V: 69, moderate, very small sample size

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:

Cadillac STS / STS-V reliability ratings and comparisons

Not enough responses this time around. I'd like to have a stat again for the STS in the future, but we'll need more participants for this to happen.

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I have a 2005 STS with the 4.6L Northstar and RWD, I would have to call it a ongoing project car.