S4 (B6 & B7 Platforms) Discussion Discussion forum for the B6 Audi S4 produced from 2003-2005 And B7 Audi S4 produced from 2005 -2008

Speedometer is Off by 3mph too slow.

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Old 01-21-2004, 09:56 AM
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Default Speedometer is Off by 3mph too slow.

The Dealer says that they cannot fix it and that US Law says Car Manufacturers have a 10% leeway on the accuracy of the speedometer.

Certainly helps my 0 to 60 time!!
Old 01-21-2004, 10:09 AM
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oh that's nice. Did you play around with tire sizes?
Old 01-21-2004, 10:11 AM
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Not yet. Stock Contis that came on the car.
Old 01-21-2004, 10:28 AM
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Default Mine reads 2 MPH slow. I did switch to winter tires, but the guy that sold them

to me said they should be the same diameter and it wouldn't affect speedometer.
Old 01-21-2004, 11:38 AM
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Default Actually, mine reads 2 MPH fast, not slow (I'm the slow one) as compared to the digital speed

immediately after resetting the average speed and as now confirmed by Garmin 2620 which is pretty cool.
Old 01-21-2004, 12:08 PM
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224/45s? Now that's what i call custom! :-p
Old 01-21-2004, 02:30 PM
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Default D.O.T. Regs + Liability

phs3:
In addition to D.O.T. tolerances regarding speedometer error, auto manufacturers' legal departments advise that speedometers are calibrated to indicate a speed slightly higher than actual. Most speedometers read 2-3% higher than actual, at least.
911sOldnNew
Old 01-22-2004, 09:11 AM
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Default My BMW m roadster is 10% high -They dont care.

Milage indicator is right on
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