WJIECO 234-9056 oxygen sensor Air Fuel Ratio Oxygen Sensor | 5-Wire Heated Wideband O2 A/F Sensor | Upstream OE 89467-07010 , 8946702040, 8946712030, 8946747010 Replacement for Toyota Camry RAV4 Lexus ES300 2.4L 3.0L | IATF 16949 Certified

234-9056 Oxygen Sensor

89467-02040、89467-47010、89467-12030

WJIECO 234-9056 upstream air fuel ratio O2 sensor for Toyota Prius, Corolla, Matrix & Scion xD gasoline models. Cross reference DENSO 234-9056 & Toyota OE 89467-02040,89467-47010,89467-12030. Plug-and-play, fixes air-fuel & check engine light codes.

• 2004–2009 Toyota Prius 1.5L Hybrid
• 2009–2010 Toyota Corolla 1.8L
• 2009–2010 Toyota Matrix 1.8L
• 2008–2009 Scion xD 1.8L

The 234-9056 Oxygen O2 Sensor (cross reference DENSO 234-9056, Toyota OE# 89467-02040, 89467-47010, 89467-12030) is an OEM-grade upstream wideband air fuel ratio oxygen sensor engineered by WJIECO for gasoline and hybrid Toyota & Scion passenger vehicles. Also known as a pre-cat O2 sensor or wideband lambda sensor, this critical exhaust component mounts before the catalytic converter to measure oxygen concentration in exhaust gas. It sends real-time oxygen signal data to the engine ECU to continuously adjust the air-fuel mixture for optimal gasoline combustion, which is essential for hybrid powertrain fuel management on Prius models.

This sensor is designed as a direct factory replacement for these applications: 2004–2009 Toyota Prius 1.5L Hybrid, 2009–2010 Toyota Corolla 1.8L, 2009–2010 Toyota Matrix 1.8L, and 2008–2009 Scion xD 1.8L.

If your Toyota or Scion vehicle triggers a persistent check engine light, rough idle, poor acceleration, increased fuel consumption, failed emission test or air-fuel related diagnostic trouble codes, your factory upstream oxygen sensor is likely suffering from sensing element contamination, signal drift or aging damage. Replacing the defective original sensor with this direct-fit 234-9056 replacement part is a cost-effective solution to restore your engine fuel control system.

OEM-Grade Construction and Strict Factory Testing

Our replacement 234-9056 oxygen sensor features a high-precision ceramic wideband oxygen sensing element and reinforced anti-vibration internal circuit. It is engineered to withstand high exhaust temperature and vibration during city stop-and-go traffic and highway cruising. The outer protective housing, wiring harness and electrical plug connector are fully dimension-matched to DENSO and Toyota OEM factory specifications, preventing wire cracking, water ingress and intermittent signal dropouts.

Every finished O2 sensor unit goes through high-temperature aging testing, air-fuel signal calibration and waterproof sealing inspection before shipment. This quality check eliminates common flaws found in cheap generic sensors, such as unstable oxygen readings, slow signal response and early premature failure.

Exact Vehicle Compatibility & Interchange OE Numbers

This pre-cat exhaust oxygen sensor is a direct replacement for the below Toyota / Scion gasoline & hybrid vehicles. Interchange Part Numbers:

• DENSO: 234-9056
• Toyota OE: 89467-02040, 89467-47010, 89467-12030

Fitment List:

• 2004–2009 Toyota Prius 1.5L Hybrid
• 2009–2010 Toyota Corolla 1.8L
• 2009–2010 Toyota Matrix 1.8L
• 2008–2009 Scion xD 1.8L

As a core component of the engine fuel management system, this upstream air fuel ratio sensor allows the ECU to fine-tune air and gasoline mixture. A faulty oxygen sensor will cause constant warning lights, higher fuel bills and failure to complete official emissions testing.

234-9056 oxygen sensor 

Core Benefits of Upgrading to the 234-9056 Oxygen Sensor

Replacing your malfunctioning factory upstream O2 detector with our pre-calibrated WJIECO 234-9056 oxygen sensor delivers noticeable performance improvements and cuts long-term fuel expenses. Unlike low-cost aftermarket sensors that repeatedly trigger fault codes due to poor calibration, our unit provides steady, accurate exhaust oxygen data for the vehicle ECU.

Reliable sensor measurements enable the engine computer to maintain the ideal air-fuel ratio, reduce unburned gasoline inside exhaust, protect the catalytic converter from overheating damage, and prevent expensive cat replacement. For the Toyota Prius hybrid system, stable AFR readings are critical to maintain hybrid battery management and normal driveability. After installation, you will recover smooth idle, restore throttle responsiveness, improve fuel economy and clear oxygen sensor related trouble codes.

Plug-and-Play Installation, No Dealer Programming Required

A key advantage of this 234-9056 oxygen sensor is its true plug-and-play design built for Toyota and Scion compatible models. This replacement part requires no ECU reprogramming, manual calibration, wire cutting or complicated mechanical modifications.

Installation works well for both professional repair garages and DIY vehicle owners. Simply remove the old sensor from the exhaust manifold or front exhaust pipe, apply anti-seize compound on threads, align and screw in the new sensor, reconnect the factory wiring plug, then clear stored fault codes using an OBD diagnostic scanner. After a short normal driving cycle, the engine fuel control system will return to stable operation without recurring warning alerts.

Every WJIECO sensor passes complete functional testing before leaving our factory. If you need a durable, high-precision and affordable OEM replacement upstream air fuel ratio oxygen sensor matching DENSO 234-9056 and Toyota OE 89467-02040 / 89467-47010 / 89467-12030 for your Toyota Prius, Corolla, Matrix or Scion xD, our 234-9056 Oxygen O2 Sensor is the ideal choice to restore your exhaust and fuel system.

234-9056 oxygen sensor