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Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Toyota Land Cruiser Prado 2.7 (J150, 2019): Downstream Oxygen Sensor Replacement

The downstream oxygen sensor (after the catalytic converter) on the 2TR-FE engine monitors catalytic converter efficiency and affects the air-fuel mixture. The sensor's service life is 60,000-100,000 km. Replacement is simple, with access from underneath the vehicle. The new sensor comes with protective anti-seize compound on the threads.

Difficulty: Easy Time: 30-40 minutes Steps: 11 Tools: 22 mm open-end wrench (or a 22 mm oxygen sensor socket), WD-40 penetrating lubricant, torque wrench, jack and jack stands (or a lift/pit)

Part

  • 🔩 Toyota 89465-60380 (OE for 2TR-FE 2004-2019, aftermarket equivalents Denso DOX-0259, NTK OZA659-EE85)

Step by step

11 steps
  1. Raise the front of the vehicle with a jack and set it on jack stands (or drive it onto a pit/lift). Let the engine cool down, because hot exhaust components are dangerous.
  2. Disconnect the negative battery terminal for 5 minutes (to clear ECU faults, optional).
  3. Locate the downstream oxygen sensor under the vehicle. It is mounted after the catalytic converter in the exhaust pipe, and its wire runs up to the wiring harness.
  4. Disconnect the sensor's electrical connector (press the locking tab and pull). Free the wire from the mounting clips on the exhaust system body.
  5. Spray the sensor threads with WD-40 penetrating lubricant and wait 5-10 minutes (old sensors tend to seize).
  6. Using a 22 mm open-end wrench (or an oxygen sensor socket with a slot for the wire), unscrew the sensor counterclockwise. If it won't budge, warm the engine up to operating temperature and try again (thermal expansion helps).
  7. Remove the old sensor and inspect the threads in the exhaust pipe for damage. If necessary, clean up the threads with an M18x1.5 tap.
  8. Install the new sensor by hand (without wiping the protective compound off the threads) for 3-4 turns, making sure the threads engage smoothly.
  9. Tighten the sensor with a torque wrench to 40-44 N·m (30-32 lb-ft). If you don't have the proper tool, tighten with an open-end wrench until snug, then an additional quarter turn (Toyota sensors have self-locking threads).
  10. Plug in the electrical connector until it clicks, and secure the wire in the clips (the wire must not touch hot exhaust components).
  11. Reconnect the battery terminal and start the engine. Warm it up to operating temperature and check that no Check Engine light comes on (the light will go out after 2-3 warm-up cycles if the sensor was the only problem).

Common mistakes and warnings

  • Do not confuse the downstream sensor (after the catalytic converter, part number 89465-60380) with the upstream sensor (in the exhaust manifold, part number 89467-60010 or another number for the 2TR-FE). They look similar but have different calibration. Installing an upstream sensor in place of a downstream one will cause ECU faults and increased fuel consumption. Do not use universal sensors without confirmed compatibility, because the 2TR-FE engine is sensitive to sensor specifications. If you replace both sensors at the same time, be sure to reset the ECU's long-term memory (disconnect the battery for 15-20 minutes) so it can adapt correctly.