We have updated results for the Jaguar XF to include owner experiences through March 31, 2010. In terms of repair trips per 100 cars per year:

2010: 124, worse than average, two cars short of the minimum for a full result; the 2009 was worse a year ago

2009: 73, better than earlier, trending in the right direciton, and now about average

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.

With the 2009 XF, the percentage with no repairs is about 51, while the percentage of lemons is about 3.

Nada-odds and Lemon-odds car reliability stats

A big thank you, once again, to this forum and everyone who has been helping. We'll have further updates in August and November. With more participants, we could provide more precise results.

Jaguar XF reliability comparisons

 

I added mine to TrueDelta.

 

Not sure if this was covered earlier, apologies if so, but does this data take into consideration the percentage of all vehicles sold?

My concern is that people participating on this website are probably those that have had problems and are looking for others that have problems (unless of course they are those here that are choosing to participate) and once they find others that are experiencing problems it's a shoe in that they will contribute to the skewing toward the dark side.

 

The percentage of vehicles sold isn't relevant. I know this isn't intuitive, but the formula for calculating sample sizes doesn't even include the size of the population.

On your other concern--this has been raised many times before, but perhaps not here. It's a hypothesis that certainly makes logical sense, but in practice we've found that the great majority of people who sign up do not initially report a repair. For some car models owners hardly ever report a repair. For others, like the XF, the reported repair frequencies have been confirmed by other reliability surveys. So there's little if any evidence that this is actually a source of significant distortion.

The structure of the survey process probably helps a lot. Unlike in other reliability surveys, people join then report going forward, rather than what happened before they joined.

 

With the August results we'll have full results for both the 2009 and 2010, though the latter is right at the minimum.

To help provide the best possible information on your year:

Car reliability research

 

Those updated stats in about a week. Additional participants would certainly be helpful, especially for the 2010 and up.

 

We have updated results for the Jaguar XF to include owner experiences through June 30, 2010. Other sources of car reliability information won't cover the more recent months until the summer or even fall of next year.

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

2010: 132

2009: 93

Both are worse than average.

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.

With the 2009 XF, the percentage with no repairs is about 51, while the percentage of lemons is about 12.

Nada-odds and Lemon-odds car reliability stats

Thank you, once again, to this forum and everyone who has been helping. We'll have further updates in November and February. With more participants, we could provide more precise information and cover all model years. Especially need more participants for the 2010 and up.

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

Jaguar XF reliability comparisons

 

Updated reliability stats next month.

As always, the more owners participate, the better the information we can provide to everyone.

Car reliability research

 

We have updated results for the Jaguar XF to include owner experiences through September 30, 2010. Other sources of car reliability information won't cover the months since April until the summer or even fall of next year.

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

2010: 133

2009: 95

Both are worse than average.

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.

With the 2009 XF, the percentage with no repairs is about 43, while the percentage of lemons is about 6.

Nada-odds and Lemon-odds car reliability stats

Thank you, once again, everyone who has been helping. We'll have further updates in February and May. With more participants, we could provide more precise information and cover all model years. Especially need more participants for the 2010 and up.

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

Jaguar XF reliability ratings and comparisons

 

We have some new pages that display all reported repairs by problem area:

2009 Jaguar XF problem reports

From this page it's possible to select a different model year or specify a problem area.

 

We have updated results for the Jaguar XF to include owner experiences through December 31, 2010. Other sources of car reliability information won't cover the months since last April until the summer or even fall of this year.

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

2010: 93

2009: 94

Both are worse than average.

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.

With the 2009 XF, the percentage with no repairs is about 45, while the percentage of lemons is about 3.

Nada-odds and Lemon-odds car reliability stats

Thank you, once again, everyone who has been helping. We'll have further updates in May and August. With more participants, we could provide more precise information and cover all model years. Especially need more participants for the 2010 and up.

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

Jaguar XF reliability ratings and comparisons

 

Is it only for newer cars? I think that website is a great idea!

 

Thanks for asking. Not only for newer cars. The main reliability survey covers back to the 1995 model year.

 

We have updated our car reliability stats for the Jaguar XF to include owner experiences through March 31, 2011.

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

2010: 79, about average

2009: 105, worse than average

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.

With the 2009 XF, the percentage with no repairs is about 24, while the percentage of lemons is about 3.

Nada-odds and Lemon-odds car reliability stats

We'll have further updates in August and November. With more participants, we could provide more precise information and cover all model years. Especially need more participants for the 2010 and up.

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

Jaguar XF reliability ratings and comparisons

 

We have updated our reliability stats for the Jaguar XF (on our redesigned site) to include owner experiences through September 30, 2011.

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

2010: 70, about average

2009: 107, worse than average

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.

With the 2009 XF, the percentage with no repairs is about 44, while the percentage of lemons is about 7.

Nada-odds and Lemon-odds car reliability stats

Thank you, once again, everyone who has been helping. We'll have further updates in February and May. With more participants, we could provide more precise information and cover all model years. Especially need more participants for the 2010 and up.

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

Jaguar XF reliability ratings and comparisons

 

Hold on a sec, population size isn't the issue. The issue is truly random sampling which is by no means the same thing.

If the sample is obtained randomly then results are surprisingly independent of population size. However, any lack of randomness adversely affects the ability of anyone to use a sample to predict the whole.

 

Stuff will break every once in ahwhile.

But it's a Jag.

Drive a Kia if you want a slightly lower likelihood that the wipers will make a funny noise.

But if you want a beautiful, fast car, consider a Jaguar.

 

I also assume that owners of Jaguars have higher expectations then would an owner of a KIA. Whereas I as a XF owner may take the car to the dealer for a wiper noise--most KIA drivers would be happy as long as the wiper worked dependably.

 

There's actually no need for hypotheticals. We post descriptions for all reported repairs to the site. View them to see if they're things any owner would have fixed vs. only one with very high standards.

On the lack of a random sample--sure, I'd love to have one. But randomly sampling owners would cost far more, and in the real world, with a response rate under 25 percent, would be of limited benefit.

Instead, unlike any other I'm aware of the survey collects data going forward rather than asking people about repairs that occurred before they joined. This way whatever past experience might have led someone to join won't affect the results. We also have a much higher response rate than a random sample would, which reduces the potential for non-response bias.

 

We have updated our reliability stats for the Jaguar XF to include owner experiences through December 31, 2011.

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

2010: 75, about average

2009: 122, worse than average

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.

With the 2009 XF, the percentage with no repairs is about 42, while the percentage of lemons is about 7.

We'll have further updates later this month and in August. With more participants, we could provide more precise information and cover all model years. Especially need more participants for the 2011 and up.

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

Jaguar XF reliability ratings and comparisons

Jaguar XF repair odds stats