The speedo in my car is not accurate and is out, by a lot.
I have checked on my Garmin GPS and a couple of phone apps and at the indicated speed of 100kph I am actually doing only 93kph. I have to set my Cruise control at 118kph to do 110kph on the highway.
I have 20 inch wheels fitted but the actual total diameter is stock. My friends new 2018 Mustang is the same. Apparently it is common.
This really is a PITA, you have no idea what your actual speed is, causes stress every time I drive past the police or a speed trap.
My Toyota Landcruiser is dead accurate, My Nissan Patrol ute is dead accurate, My SV6 Commodore is pretty close, the daughters Subaru Outback is spot on.
Has anybody had Ford Australia fix this issue? I see that in the States a re-flash of the ECU is available to fix this problem.