Denso Oxygen (O2) Sensor 234-4622 — Direct-Fit 4‑Wire 12.6in Harness for Lexus/Toyota

The Denso 234-4622 is a direct-fit narrow-band oxygen (O2) sensor with a 4-wire, 12.6-inch harness engineered to replace the factory sensor on select Lexus, Toyota and Pontiac vehicles.

This replacement O2 sensor is built to meet original-equipment standards and is intended to restore accurate air-fuel sensing after an aging or failed factory unit. Denso designs each sensor with protective layers and a refined zirconia sensing element so the part fits like the factory component and resists common contaminants that shorten sensor life.

Which vehicles does this Denso sensor fit?

The 234-4622 is matched to a long list of model years across Lexus, Toyota and a Pontiac Vibe. Confirm fit by comparing the part number and connector type to the sensor you’re replacing or use your VIN to verify compatibility.

• Lexus: ES300 (1995–1998), ES300h (2013–2018), NX200t (2015–2017), NX300 (2018–2021), NX300h (2015–2021)
• Pontiac: Vibe (2009–2010)
• Toyota: 4Runner, Avalon, Camry, Corolla, Matrix, Paseo, RAV4, Sienna, Solara, Tercel across specific years listed in the product details

How does this sensor help engine performance and efficiency?

By delivering accurate oxygen-level data to the engine control unit, a healthy O2 sensor helps the vehicle maintain proper air-fuel ratios. That supports smoother idling, more consistent combustion and helps the engine management system correct fuel trims when needed.

• Zirconia sensing element for reliable voltage response to oxygen changes
• PTFE filter to block efficiency-robbing contaminants
• Aluminum-oxide trap layer to reduce poisoning from silicone and lead

What are the build qualities and technical details I should know?

Denso manufactures this sensor to match OE fit, form and function so installation is typically straightforward. The housing and wiring are constructed to resist corrosion and heat common around exhaust systems.

• Part number: 234-4622, four-wire design with 12.60-inch harness
• Corrosion-resistant stainless-steel construction and PTFE protection
• Package includes one sensor; item dimensions roughly 5.75 x 2.19 x 1.88 inches, weight about 0.25 lb

Will this sensor install like the original and what parts interchange are supported?

Denso engineers replacement sensors to be first-time-fit where listed, reducing modification or adaptation needs. The product lists many OEM interchange numbers — compare those or your vehicle’s existing part number to ensure a match before purchase.

• Designed for direct replacement with factory-style connector and wiring length
• Multiple parts-interchange numbers are provided for cross-reference
• Intended for applications that require a narrow-band O2 sensor

Who is this for: The Denso 234-4622 is aimed at DIY mechanics, independent repair shops and fleet technicians needing a reliable, OE-quality narrow-band oxygen sensor for compatible Lexus, Toyota and Pontiac models. Choose this sensor when you want a direct-fit replacement with contamination protection and corrosion resistance to help restore proper engine air-fuel sensing.