How to Replace Input Speed Sensor 01-07 Hyundai Elantra
Difficulty: Beginner · About 35 min · Hyundai Elantra
Replace the input speed sensor on a 2001–2007 Hyundai Elantra by removing the intake components, exchanging the sensor, and restoring all air-box and wiring connections.
Tools you will need
- Socket Extensions
- Flat Blade Screwdriver
- 10mm Socket
- Ratchet
Parts and supplies
- Automatic transmission input speed sensor
Steps
Remove the engine cover and intake
Switch off the ignition. Remove the engine cover and air-collector fasteners, unplug the mass-airflow sensor, and loosen the intake hose clamp. Release the air-box cover, lift out the filter, and move the air-box housing aside to reach the input sensor.
Remove the old input speed sensor
Remove the sensor's 10 mm retaining bolt and withdraw the sensor from its mounting point. Unplug its electrical connector and inspect the seal and harness for damage.
Install the replacement sensor
Connect the sensor harness and seat the new sensor in its mounting point. Reinstall and tighten the 10 mm retaining bolt, then confirm the connector is locked and the harness is routed clear of moving parts.
Reassemble the intake and test
Return the air-box housing and secure its bolts. Refit the air filter, close and latch the air-box lid, reconnect the intake tube and breather hose, and tighten the clamps. Reconnect the mass-airflow sensor, reinstall the covers, and check for warning lights after starting.
Check your vehicle’s repair manual for exact specifications and fit.