Those results have been posted. Most model years have repair rates near the average. But for the 2007, where I report on the coupe separately, no repairs have yet been reported. With a larger sample size, there would be repairs, but the repair rate certainly seems low for the last year of the first gen coupe.

For the full set of results, and sign up to help (if you haven't already):

TrueDelta Vehicle Reliability Survey results

 

Next update this month.

Overall, 579 Gs are signed up. But most of these are sedans. To provide precise information on the coupe alone, where this is necessary, we still need additional participants.

Vehicle reliability research

 

Updated results recently posted. Some repairs reported for the 2007, but still very few.

For other years I continue to combine the couple and sedan, but would split them if we had more participants. In general, the G appears to have a repair rate a bit better than the average.

TrueDelta Vehicle Reliability Survey results

 

Now 635 Gs, but still mostly sedans. We're going to start providing additional information for models with large sample sizes, and many years of the G35 and G37 should qualify. The more, the better.

Vehicle reliability research

 

Updated results posted. Infiniti G35 reliability, in terms of successful repair trips per 100 vehicles per year:

2003: 57, better than average

2004: 34, better than average

2005: 84, about average--results for other years suggest that the actual repair rate is lower

2006: 33, better than average

2007 coupe: 14, much better than average--but small sample size; especially need more of these

2007 sedan: 74, average (a couple of early bugs)

2008: 47, average, maybe a bit better

Additional participants would be helpful for all model years. The larger the sample size, the more information we can provide.

For the full set of results, and to sign up to help:

TrueDelta Vehicle Reliability Survey results

 

So far only the 2007 coupe is reported separately, for obvious reasons. Currently we're a single response short of being able to report a result for this year in the February results. In other words, need more participants for the coupe...

Infiniti reliability research

 

Got that response.

TrueDelta has released updated Car Reliability Survey results for the Infiniti G35 AND G37. In terms of successful repair trips per 100 cars per year:

2008: 50; about average, large sample size

2007 sedan: 72, about average

2007 coupe: 16, better than average, very small sample size

2006: 27, better than average

2005: 80, about average; other results suggest actual repair rate is lower

2004: 33, better than average

2003: 47, better than average

Overall, the Gen 1 cars seem to require fewer repairs than the current generation, despite their greater age. It's possible that the repair rate for the current cars will improve one a few initial problems drop out of the analysis, which always covers the past year.

A big thanks to everyone who has been helping. We'll have further updates in May, August, and November, so additional participants would certainly be helpful.

TrueDelta now has a separate results page for each model that includes the scores of competitors for easy comparisons. The one for the Infiniti G35 / G37:

Infiniti G35 / G37 reliability comparisons

 

Updated results next week.

With the 2007 coupe we again barely received enough responses for a partial result. Very much need additional participants for the 2007 coupe. Other years also helpful, especially if we start reporting results separately for the coupe and sedan for all years.

For the details, and to sign up:

Car reliability research

 

I just signed up my 2006 coupe. I did notice though that I was never asked whether it was a coupe or sedan... if you are planning on attempting to differentiate these later on down the line, are you going to have to go back to each individual participant to retrieve that information?

 

Thanks for asking. Bodystyle and powertrain information are collected the first time you complete any of the surveys.

 

Why don't you start with consumer reports. They likely have info for like 100x the vehicles you do. If i recall, 2003 listed engine as a trouble area

 

Two good reasons, that 90+ percent of the population doesn't realize:

1. I want data that's less than a year old--their current results are based on an April 2008 survey, when all of the cars covered were a year younger.

2. I want actual problem rates, not just red and black dots. How many more repairs will an "average" car require compared to a "better than average" car? For some reason few people think to ask this question. If they do ask it, CR doesn't answer it.

Say the engine is a "problem area." What are your odds of having a problem with the engine?

People project all sort of things onto CR's dots that aren't really there. They're almost like a Rorschach test.

If you want real information, OTOH, my approach is a much better way to get it.

 

I applaud your effort and reasoning. But I would also imagine the % of vehicles on the road compared to the number if your sample is very low compared with the numbers they compare. You are also collecting data from "enthusiasts" who surely drive their cars MUCH harder than that average owner but also likely are abit more diligent on maintenance. So certainly almost unlimited number of parameters to consider.

I am anxious as everyone to see your outcome certainly. I am a big fan of CR and won't ever buy anything they do not reccommend. A black dot on the engine for whatever reason will dismay my interest in that model/year.

 

Very few of the repairs people report could have been caused by driving the car aggressively. Nor, for cars with fewer than 100,000 miles, could these repairs have been avoided through additional maintenance.

The formula to calculate required sample sizes does not even include the size of the population. It's irrelevant, though I must admit this is not intuitive.

A car can get a black dot in CR's results with a problem rate as low as 3%--that's one problem for every 33 cars. The problem could be higher, even much higher--but there's no way to tell.

 

im in for an 06 coupe!