Denso Oxygen (O2) Sensor 234-4622 — Direct-Fit 4-Wire 12.6" Harness for Select Toyota, Lexus & Pontiac

The Denso 234-4622 is a direct-fit narrow-band oxygen (O2) sensor with a 4-wire 12.60" harness, designed to replace the factory sensor in select Lexus, Toyota and Pontiac models.

This Denso replacement sensor is manufactured to meet original-equipment tolerances and uses a protected zirconia sensing element to deliver consistent air–fuel feedback for the vehicle’s engine control system. It fits a long list of model years across Lexus ES and NX lines, Toyota Camry, RAV4 and others, plus the Pontiac Vibe, providing a one-to-one fit intended to minimize installation hassles and reduce the need for adaptors or wiring changes.

Which vehicles and years does this Denso sensor fit?

The 234-4622 is cross-referenced to many OEM numbers and applications. It’s intended for specified Lexus ES300 and NX series years, Pontiac Vibe, and a broad range of Toyota models spanning Camry, Corolla, RAV4 and more. Always confirm fit by matching the part number, connector type and harness length to your vehicle.

• Fits Lexus ES300 (1995–1998, 2013–2018 ES300h) and NX models (2015–2021 variations)
• Fits Pontiac Vibe (2009–2010)
• Fits Toyota: 4Runner, Avalon, Camry, Corolla, Matrix, Paseo, RAV4, Sienna, Solara, Tercel across listed years
• Compare part number 234-4622 with OEM cross numbers before ordering

How is this sensor constructed and what protects it from contamination?

Denso builds the sensor with corrosion-resistant stainless steel and a refined zirconia element that senses oxygen levels. An aluminum oxide trap layer and PTFE filter help block silicone, lead and other contaminants that can shorten sensor life, so the unit maintains stable output for longer.

• Stainless steel body resists exhaust corrosion
• PTFE filter reduces contaminant exposure
• Aluminum oxide trap layer shields the ceramic sensing element
• Zirconia element improves response accuracy

What are the electrical and physical specs to check before installation?

This is a narrow-band, four-wire sensor with a 12.60-inch wiring harness—verify connector compatibility and harness routing for your vehicle. The sensor ships as a single unit and its compact dimensions make it suitable for the exhaust locations specified by the OEM applications list.

• Type: Narrow-band O2 sensor, 4-wire
• Wiring harness: 12.60 inches length
• Package quantity: 1; item weight: ~0.25 lb; dimensions: 5.75 x 2.19 x 1.88 in
• Check parts interchange and OEM numbers to confirm fit

Will installing this sensor affect fuel economy or drivability?

A properly functioning oxygen sensor provides the engine control unit with accurate air–fuel ratio information, which supports consistent combustion and smoother engine operation. Replacing a worn sensor can reduce drivability issues related to incorrect fuel trims, though results vary by vehicle condition and diagnostics.

• Replaces worn sensors that can cause rough idle or erratic fuel trims
• Helps restore correct oxygen feedback to the ECU
• Not a substitute for full engine diagnostics when multiple faults exist

Who is this for: The Denso 234-4622 is aimed at vehicle owners, independent mechanics and fleet technicians who need an OEM-quality replacement oxygen sensor for compatible Lexus, Toyota and Pontiac models. It’s a good choice when you want a direct-fit, corrosion-resistant sensor with contaminant protection and documented parts interchange references. Confirm application and connector match before purchase to ensure a correct and hassle-free installation.