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On top of the transmission
Depends on which speed sensor: wheel speed sensor (non-ABS) islocated on right front wheel, input speed sensor is located on top oftransaxle under air box, output speed sensor is on top of transaxlekind of under brake master cylinder, vehicle speed sensor is locatedon top of differential housing.
Output speed sensor
probably $150.. cos i had to pay 300 for both the input and output sensor....
I believe it is a input speed sensor. Hyundai calls them pulse generators on the 99 elantra.
Vehicle speed Sensor Malfunction
Vehicle speed sensor range/performance
under the air box on the center of the bell housing
P0715 Trans Speed Shaft SensorP0715 Transmission Speed Shaft Sensor Circuit Malfunction Possible Causes TSS signal circuit open or shorted to ground TSS is damaged PCM has failed
just bought one at autozone for $65. Was about the same price as an input speed sensor and looks very similar.
Once you register, there is a pdf located at the following link that can show you both the Input and Output speed sensors. http://www.hyundai-forums.com/t5491-input-output-speed-sensors.htm
the input speed sensor is on top of the transaxle, about six inches from the engine, and directly in line with the engine. there is a technical service bulletin from Hyundai (#05-40-011 [aug. '05]) about input speed sensor problems, including dtc (diagnostic trouble code) p0715. trouble with the input speed sensor will make for some funky shifting, so if the engine revving to about 5000 rpms before the transaxle shifts out of 1st gear makes you smile, then don't replace the sensor. but if you want your car to run well.....wait, all you asked was where the speed sensor was, so....the input speed sensor is on top of the transaxle, about six inches from the engine, and directly in line with the engine.the engine speed up car goes faster but never shifts