Toyota 89413-33030 Transmission Revolution Sensor

Removal steps 1. Park on level ground, set the parking brake, chock wheels, and wear eye protection and gloves. 2. If required by design to access the sensor, raise the vehicle and support it securely on jack stands. 3. Disconnect the negative battery terminal and isolate it to prevent electrical shorts. 4. Locate the speed sensor (typically on the transmission housing or wheel hub in most vehicles) and expose the connector and mounting area. 5. Depress the electrical connector tab and carefully unplug the sensor; inspect the connector for corrosion or damage. 6. Remove the sensor's retaining fastener(s) or retaining clip(s) as required by the design; keep any reusable hardware separate. 7. Gently withdraw the sensor from its bore or mounting location; twist slightly if it is stuck and avoid prying on the wiring. 8. Inspect the mating surface, bore, wiring, and any O-ring or seal; clean the area and set contaminated parts aside for replacement if damaged. 9. Protect the opening (use a clean rag or plug) to prevent debris from entering while the sensor is removed. Installation steps 1. Confirm the replacement sensor matches the original and that any new O-ring or seal is included and correct. 2. Lightly lubricate the O-ring or seal with an appropriate lubricant if the design calls for it (follow part guidance). 3. Carefully seat the new sensor into the bore without forcing it and ensure it is fully and evenly seated. 4. Reinstall the retaining fastener(s) or clip(s) and snug them securely by hand and with tools-use manufacturer-specified tightening method or torque if available. 5. Reconnect the electrical connector until the locking feature engages and verify the wiring is routed without sharp bends or contact with moving parts. 6. If a wheel or other components were removed, reinstall them and secure per manufacturer procedures. 7. Lower the vehicle if raised and remove wheel chocks and jack stands. 8. Reconnect the negative battery terminal and tighten securely. 9. Start the vehicle, observe instrument cluster lights (ABS/speedometer), clear and scan for any diagnostic trouble codes, then perform a short road test to confirm correct speedometer/ABS operation and re-scan afterward. 10. Repair tip: label connectors and routing before disassembly, and replace any damaged O-rings or corroded connectors to prevent future faults.