How do you know?

It may be reading in km, so there must be a setting you have played with, if this has just happened.

Alternatively there is a fault in the sender.

How long have you had the car?

hello can somneone advise why my odemeter reading is counting my distance travelled too fast.

Do as I just did for you.. Google (other search engines are available) Change odometer kms to miles mazda 3. answers in owners forums and yahoo answers as well as your handbook accoerding to results. simples.

Thread closed as - doubtless for some excellent reason - the OP has started another thread asking exactly the same question.