My 2008 FX35 speedo shows I'm going 50mph but I'm only going 30mph

Gala

Member
Car
2008 Infiniti FX35 AWD
Name
Gala
I sure hope this sounds familiar to someone. I've checked my tires and adjusted the pressure. My tires are only 1 year old and I know I have a bad tire sensor in one or two of my tires but from what I'm hearing that shouldn't matter.
 
If you're running stock size tires, the speedometer cluster will most likely the culprit.
 
I am having something similar happening with my 2008 FX45, but the speed discrepancy on mine was not as severe as yours. Mine reads as if I am going 5mph faster than what I am actually traveling.
There is a recall on some of these vehicles where Infiniti will readjust the speedo, but such adjustment will not correct the issue 100%.


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There was a speedo recall back then to correct a 10mph discrepancy. I had that recall but my speedo still shows 65mph yet it is reading 60mph om ny radar detector unit. When I moved the radar unit to my other vehicle, the reading is accurate. I assume the discrepancy is because I am running 20s wheel while my vehicle comes originally in 18 stockers.
 
I sure hope this sounds familiar to someone. I've checked my tires and adjusted the pressure. My tires are only 1 year old and I know I have a bad tire sensor in one or two of my tires but from what I'm hearing that shouldn't matter.
 
Just noticed my speedometer doing that is well,,going 30 then jumps to 50?,did u find out what caused this?
 
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