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Car: Astra j
Location: Uk
Sex: Male
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Hi guys and girls
I’ve started you use the motorway quite a bit lately and I’ve noticed if I want to go 70mph the speed on the clocks must be 76 mph is this common or do I need a software update or something
Thanks
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Car: Astra J SRI
Location: Northants
Sex: Male
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It's common for speedo to be out to gps speed, it's doesn't sound to far as it's only 10% saves you getting a speeding fine.
NAVI950 , DAB+ & Rear Camera , quick heat, auto lights and rain sensor retrofit
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Oh that’s good as long as it not just me
Thanks
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Car: Astra-J 2.0 CDTi
Location: Oxford
Sex: Male
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Speedo will never be 100% accurate. As tyres wear, the circumference lessens, and subsequently will affect the speedo reading.
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Car: 2013 Sport tourer 1.7 CDTI (96kw)
Location: Belgium
Sex: Male
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Mine is off by about 2.5 miles. Quite normal on any car.
Retrofitted:
Reverse Camera, Quick heat, Navi 950, dual horn, TPMS.
![[-]](https://vxoc.org.uk/forum/images/dark1.8/collapse.png "[-]")
