986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - is there a fix for speedo reading too high?

Stl-986 · 07-25-2022, 01:50 PM

8% high compared to what? If comparing to GPS....GPS isnt a good test down to low %. Best method....have a cop friend run radar on you, that will be accurate and compare to what your speedometer says. I doubt you are off by much to even notice it.

It isnt like the old 944/911's where you could change the speedo gear in the trans. As Jeff points out...it's an electrical signal.

If you want it reading the way it left the factory....put factory tire sizes back on.

07-25-2022, 01:50 PM	#10
Stl-986 Registered User Join Date: May 2017 Posts: 1,180	8% high compared to what? If comparing to GPS....GPS isnt a good test down to low %. Best method....have a cop friend run radar on you, that will be accurate and compare to what your speedometer says. I doubt you are off by much to even notice it. It isnt like the old 944/911's where you could change the speedo gear in the trans. As Jeff points out...it's an electrical signal. If you want it reading the way it left the factory....put factory tire sizes back on. __________________ 2000 Boxster Tiptronic 2003 Boxster 2003 996 C2 Cab 2002 996 (SOLD) 1986 944 (gone but missed)