2013 2.5i Premium CVT
Like many other reports here, my speedometer reads 3-4% faster than I'm actually traveling. Is there any way to adjust this?
No, I'd rather it be correct using the largest diameter tire I will run (and then read a little fast as my tires wear). If I know how fast I'm actually going, an incorrect speedometer is simply racking up more miles on my car than I'm driving.Would you rather it reads 3-4% LOW? I'd rather think I'm going FASTER than I actually am. Considering some of the factors that go into reading the speed, 3-4% is an acceptable variance, as long as it reads high. How do you know the device used to verify your speed was entirely accurate? GPS is close but it's not 100% accurate, the roadside speed guns (the ones that tell your speed) are likely not calibrated like a radar or laser unit used by a cop.
Sure, over the long-term it can make a difference on when oil changes happen (you've actually gone 4,850 miles instead of 5,000 miles), or that you've only gone 97,000 miles instead of 100,000.
I don't like this option. I miss the days when I could simply change the speedometer gear in the transmission. I also know that speedometer shops used to have the ability to change the computer (e.g., in cases where you changed tire size or gear ratio). Is this still possible?3-4% larger circumference tires is about your only option.
This is actually law. I believe manufacturers are allowed to have speedos that read at or above your actual speed by 10%. So most companies design speedos to read a little fast to make sure the don't end up in trouble.Most cars error on the high side rather then lower.
Correct. All motor vehicles legally sold in the US have a certain amount of speedo error. They intentionally design them to read slightly fast to avoid lawsuits etc. It has not become an issue until people started using GPS and have something to compare it to.This is actually law. I believe manufacturers are allowed to have speedos that read at or above your actual speed by 10%. So most companies design speedos to read a little fast to make sure the don't end up in trouble.
Personally I've never owned a stock car that didnt read 2-3 MPH fast at 60 MPH.
Looks like I was wrong that federal regulations would allow the speedo to overestimate speed, but not underestimate. The exact wording of the federal regulation is as follows. My belief though is that these cars (and most cars) are built to meet European specs, which do not allow for the speedo to under estimate speed.What DOT law is this? I've done a little reading and have never seen it..