Downstream Air Fuel Ratio Lambda Oxygen Sensor for Toyota

The Downstream Air Fuel Ratio Lambda Oxygen Sensor for Toyota from IWOKPHD is a precision downstream O2 sensor designed to monitor the exhaust after the catalytic converter. By measuring the air-fuel ratio in the exhaust stream, it helps the engine control unit fine-tune fuel delivery for cleaner emissions, better fuel economy, and smoother idle. This downstream sensor plays a crucial role in maintaining catalytic converter efficiency and reducing the likelihood of false DTCs that can trigger warning lights on your dash.

Built for reliability, this sensor is compatible with a wide range of Toyota and Lexus applications, including Camry, Sienna, Supra, Celica, Matrix, Prius, and more. It carries OEM references such as 234-4623 and a suite of related part numbers to ensure a precise fit. Whether you’re restoring an older Toyota or upgrading a modern setup, this unit provides the post‑catalyst feedback your engine needs for optimal combustion and reduced emissions. All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Branded by IWOKPHD, this sensor uses a piezoelectric sensing element with a dedicated heating type to maintain quick response times in varying temperatures. Its downstream rear probe design is tailored to deliver accurate oxygen readings after the catalytic converter, helping your vehicle maintain proper air-fuel balance across a range of driving conditions.

At intercyprus.com since 2002 — trusted for quality and reliability.

Benefits & Tips

• Improve exhaust measurements after installation by ensuring the sensor reaches operating temperature quickly, which helps the engine control system optimize fuel usage.
• Use as part of a targeted repair when diagnosing post-catalyst fuel trims or persistent check engine lights related to downstream O2 sensing.
• Double-check compatibility with your exact model year and engine (applications include Lexus GS460, GS430, GS400, GS300; ES300; Toyota Prius, Matrix, Celica, Camry, Sienna, and more) to avoid misfit issues.

Product Specifications

• Brand: IWOKPHD
• Sensor Type: Piezoelectric
• Heating Type: Heating
• Measuring Range: Downstream Rear Car Probe Air Fuel Ratio Lambda O2 Oxygen Sensor
• OEM No.: 234-4623
• Origin: Mainland China
• Part Numbers: 234-4623, 2344623, 234 4623, 89465-20510, 8946520510, 89465 20510, 15273, 24605, 89465-30190, 89465-30360, 89465-30410, 8946530190, 8946530360, 8946530410, SG358, 24605, 15273, ES20224, 89465-47070
• Applications (selected): Lexus GS460 4.6L (2008–2011), Lexus GS430 4.3L (2001–2004), Lexus GS400 4.0L (1998–2000), Lexus GS300 3.0L (1993–1997), Lexus ES300 3.0L (1992–1996), Pontiac Vibe 1.8L (2003–2006), Scion xD 1.8L (2008–2014), Toyota Prius 1.5L (2001–2009), Toyota Matrix 1.8L (2003–2006), Toyota Celica GT 1.8L (2000–2005), Toyota Celica 1.8L (1996–1997), Toyota Sienna 3.0L (1998–2000), Toyota Camry 3.0L (1992–1996, 1994–1996).
• Warranty: 2 years (Replacement Warranty)

Package includes:

• 1 pcs

Warnings / Reminders

• Please verify compatibility against the listed applications and part numbers before purchase to ensure proper fitment.
• All items ship within 2 working days after payment is confirmed. Import duties, taxes and charges are not included in the item price or shipping charges and are the buyer’s responsibility.
• If the part arrives damaged or faulty, contact our Customer Service with a description and photos so we can resolve it promptly (photos and videos help us assist you faster).

Providing quality and trusted service since 2002 at intercyprus.com.