Hi,
Does any one know where the speed sensor located in 91 accord and how it looks like.Odometer needle suddenly goes to zero but come back up after few seconds but I don't see any speed change.I think it is the sensor.

Thanks

 

It's burried in the right front tire well. I had to replace one on my old 92 Accord Coupe but I honestly don't remember exactly where it is.

 

its byt he firewall on the passenger's side

thrs two hoses going to it and one electrical connection

 

yup... by the firewall on top of the tranny... its almost right under where the air intake pipe connects to the throttle body. Dont remove the part with the hoses connected to it though, that can stay in there... remove just the top part with the harness going into it.