Speedometer is off... - Kia Forum
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post #1 of 32 (permalink) Old 09-01-2011, 10:28 AM Thread Starter
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Default Speedometer is off...

The speedometer in my Sportage SX is off by 3mph against my favor. According to my Garmin (which was tested in two other vehicles for accuracy), if I'm doing 60 on the dash, I'm actually doing 63.

Brought the car to Kia and they told me that "the more I drive it, it will self correct." I don't believe this for one second.

Any advise from the forum?

Thanks.
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post #2 of 32 (permalink) Old 09-01-2011, 10:39 AM
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Does the car have the original tires and rims? A 3 mph error at 60 mph is only a 5% variance, which may be within acceptable manufacturing tolerances.

Last edited by Ken99; 09-01-2011 at 10:41 AM.
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post #3 of 32 (permalink) Old 09-01-2011, 11:00 AM Thread Starter
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Car is a factory original, right off the lot and 1 month old.

The Garmin was synced with a Rogue, Sonata, Subary Legacy and Caddy CTS.

I've never had a car with a speedometer that was off by 3mph. It just seems ridiculous in this day and age.
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post #4 of 32 (permalink) Old 09-01-2011, 11:26 AM
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ask the dealer to check it and do some adjustment if it is off.
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post #5 of 32 (permalink) Old 09-01-2011, 11:38 AM Thread Starter
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That's exactly what I did - brought it to the dealership, told them the problem, showed them the problem. Their response was lazy and ridiculous. The told me it would "self-correct" and literally dismissed me. I am going to another dealership.
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post #6 of 32 (permalink) Old 09-01-2011, 11:51 AM
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There is no adjustment for the speedometer and there is an acceptable margin of error.

Also, your gps is not perfect. It has it's own margin of error.

I recommend you find a method of measuring speed with NO margin of error to compare to your speedometer, if you can.

Also(v.2), speed is the calculation of distance versus time, where time is relative. Take it as you will.

Why GPS is inaccurate.
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post #7 of 32 (permalink) Old 09-01-2011, 11:56 AM
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Try waiting for your car to hit the 3k miles mark and then retest. If it is brand new and the dealer said it will self adjust, try it and see if they are right. If it hasnt self adjust after the 3k, then bring it back to the dealer and tell them there self adjusting sensor is broken.
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post #8 of 32 (permalink) Old 09-01-2011, 12:10 PM
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Within acceptable variance specs, sorry...............

Dealer is clueless.
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post #9 of 32 (permalink) Old 09-01-2011, 12:28 PM
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My garmin and Navitel both constantly show a speed 4 kmph less than what is shown on the speedometer irrespective of the speed. But the odometer is accurate to the km.
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post #10 of 32 (permalink) Old 09-01-2011, 02:18 PM
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Find a nice straight, fairly flat stretch of highway with mile markers. Set the cruise control to 60 mph. Using a stop watch (like the one in your cell phone), time several one mile intervals. Should clock 60 seconds per mile.
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