What's more accurate - a speedo or a satnav?

The speed recorded on my satnav is 3mph slower than the speedometer reading, which is likely to be accurate?

How accurate are speedometers?

How accurate are speedometers? My Toyota Auris 2016 reads about 10% lower than reality, i.e. 63mph shows as 70mph and 27mph shows as 30mph. This is unacceptable. All data on this car is inaccurate and...

Why doesn't my speedometer work after changing the battery?

The speedometer in my Ford Ka doesn't work after changing the battery.

I sold an old car to a dealer with more mileage than I said - do I owe him compensation?

I sold a 10 year old car with 27,000 miles and a full service history, only to be told a week later that the car had a speedo change eight years ago and has actually covered 35,000 miles. The dealer that...

Why don't speedometers highlight the most important speeds, like 30mph?

Why can't cars sold in the UK have speedometers that highlight the most important speed limits, e.g. 30 mph, in numbers instead of a trying to align a needle with a small blob of paint? I've stuck a 30...

The speedo in my car doesn't match the speed I'm actually driving at?

When driving, the speedometer in my Citroen C3 Picasso is showing a different speed to that which I'm actually driving it. How do I fix it?

How do I fix the intermittent display fault in my 2004 Ford Focus?

My Ford Focus 1.6 has done 88,000 miles. It kept showing an intermittent display fault with the odometer, speedometer, fuel gauge and temperature gauge all not working. Now none of these have worked at...

Baleno speedo - is there a problem with reading when it's bright?

I had a test drive in a Suzuki Baleno this morning, which I loved, but noticed that under certain light levels (it was bright) the speed indents for 30, 50 and 70 became invisible. Given the sheer number...

Where can I obtain a mph speedometer ?

We returned to live in England late Feb and brought back our Hyundai car bought new in Southern Ireland in May 2012 .We cannot tax or insure it until it acquires GB plates but the kms only speedo is not...

Speed indicator signs

You've written a lot about speedometers over-reading a car's true speed. I recently hired a car, an i30, and was driving through a village with a speed indicator sign and the sign indicated the exact speed...