Quote:
Originally Posted by MazdaMatt
What does it take to get a car's speedo recalibrated? I have smaller tires than stock, and I think my stock tires weren't even well calibrated. I'm actually about 5% off, i think.
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Quote:
Originally Posted by wikityler
AFAIK on old cars the speedometer pinion would get replaced. On newer cars I would guess that the dealership can change a setting in the ECM.
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Some modern cars and trucks (particularly trucks) that have aftermarket ECU-tuning devices available can recalibrate for tire size changes. Of course, the catch is that this does not actually apply to most people, especially not here. Odds are, you pretty much have to live with an inaccurate speedo/odo. Consult your relevant 'tuning enthusiast' communities where applicable.
Interestingly, on the xB, my non-stock tires make the speedo
more accurate, while making the odo read low. The stock size tires work for the odo, but make the speedo about 2% low. It's really bizarre that Toyota did that, on top of the fact the Japanese version of the car uses a yet another tire size (185/60/15, I think).