Speedo in Lexus 250
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Asked by Ray Williams
I am after a company that can test the speed of my Lexus 250 against what is shown on the speedometer. When I am driving along it seems as though cars are going past or are tailgating me, while according to what I see in front of me, I am sitting on the speed limit. This gives me the impression that something is wrong with the speedometer. What could I expect the cost of such a test to be?
Answered by CarsGuide
19 Apr 2011Normally I would expect your speedo to be around five percent fast, in other words it's reading five percent higher than the actual speed you're doing. Under the law it could be as much as 10 percent fast, but on average most cars appear to be closer to five percent. You could have the speedo checked by an instrument maker, but I would suggest you first check it against an overhead speed indicator on a nearby highway. While they are not necessarily 100 percent correct, they are a good guide. You could also check it against a GPS unit, which would give you a good indication of a problem.
