Odometer Not Calculating Properly

[wattsonb]

Howdy everyone. We just purchased a 2009 G37 Convertible Coupe, and it seems we have a problem with the odometer not accurately logging miles. The speedo and tacho seem to be working correctly, and the odometer display is lit, but after driving 50 - 75 miles it is only recording maybe ten miles. I am thinking the display is OK but that either the sensor and/or the computer black box that does the calculations has a glitch. Can anyone give me a rough idea how the system works? I am also assuming this is not a common problem as I cannot find anything like it on the WWW. Any suggestions?

[Rogue One]

Hmm, I was able to find this article online Misleading Mileage: Is your car's odometer working properly?

First, make sure your tires are in good shape; improperly inflated or worn tires can throw off your reading. Another possible issue? The gauge could just be calibrated differently.

[wattsonb]

Thanks for the reply. Brand new tires fitted, and even that I think would have to be off quite a lot to lose so much on the odometer. Running it by the dealer tomorrow for an expert opinion. I'll keep you posted on our findings.

[Rogue One]

Cool beans.

[wattsonb]

The plot thickens - it looks like the trip meter is running accurately while the odometer is off by 25% or more to the low side. Weird

[audtatious]

Hmmm...will make resale much easier in the future

[ArcticMinibike]

HELP! I have the same problem and can't find anything other than a couple of reports of people with the same issue. No resolution.

I just bought a 2008 G37s with just over 60K. I didn't think anything of it because it was one-owner and more of a weekend car than a daily driver, or so I was told. I drove the car home 400+ miles and it only registered about 120 on the odometer. The speedometer is accurate. Everything is factory original, no customization of the head unit. The trip meter is also impacted. I reset the trip at a tank fill-up and it looks like a full tank only got 100 miles before it was empty. It's bizarre. Not only do I feel like I got ripped off, I don't know how to fix it or how much it will cost. Anyone ever find the answer to this thread?

I have a 2005 G35 and am used to those dash clusters reading fuel inaccurately, but I thought I was finally breaking free from cluster issues.