My 1998 Buick Regal does not show the speed I am going. The needle won't move. I think I have to change the speed sensor and I don't know where it is located - in the transmission? or the engine?

It could be a speed sensor which is a simple replacement or there could be something wrong inside the electronic control.

Sensor in hub bearing is bad

Speed sensor gone bad .

my truck did that and it was a PEC fuse

Hello: I have had that occur several times, if you will get a strong magnet you can pull the needle back around to the correct position. (leave key off) If that don't work you will have to remove the cluster, remove the clear cover from the cluster and carefully move the needle back to the correct position. (this usually occurs when you connect the battery with the key on. (DO NOT CONNECT BATTERY WITH KEY ON IN ANY VEHICLE)

Your Regal has no cable.....This is a moving needle operated by a magnetic coil.....
If not wotking ?? Could be a vehicle speed sensor????

The speedometer sensor - VSS - vehicle speed sensor is a input to the PCM - powertrain control module -engine computer . The signal from the PCM to the instrument cluster for speed info. is sent on a serial data communication network (class 2 ) I would think it would be an instrument cluster problem . Get a used one from a auto salvage yard 15 - 20 bucks an see if it fixes it . If it does ,send your's out an have it repaired .

This could be the speed sensor in the transmission. I believe it is electric on the 98 takes about 15min to change and is located on the long end of the trans.

try the crank pos sensor

check cv joints.