sensor on rear wheel??

Hi

someone told me there’s a sensor on the right rear wheel which is exige specific…
I’m wonder what data is collected??

cheers
(sorry for my dumb question, I’m a newbie for an “old” car!)

It’s a vehicle speed sensor for the ECM.

Yes ,but anyone know how come with the motorsport uprights the censor will only fit on the left? I have had to bond the censor on the right so i can get the speedo to work?

I believe you don’t need either of them if you run an emerald

have a look HERE

ok so just the left one