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

This replacement sensor is engineered to meet original-equipment tolerances so it installs cleanly and performs reliably. Built with corrosion-resistant stainless steel, a refined zirconia sensing element and Denso’s aluminum oxide trap layer, it resists contamination and responds quickly to changes in exhaust oxygen levels. The 234-4622 fits a wide range of vehicles — including select Lexus ES300/ES300h and NX models, Pontiac Vibe, and many Toyota sedans, SUVs and coupes — making it a practical choice for routine maintenance or targeted repairs.

Which vehicles and part numbers does this sensor replace?

The Denso 234-4622 is listed for many Lexus, Toyota and Pontiac applications across different years. It also cross-references several factory part numbers and aftermarket interchange codes for easy verification before purchase.

• Exact Denso part: 234-4622
• Compatible models include Lexus ES300 (1995–1998), ES300h (2013–2018), NX200t/NX300/NX300h (various years), Pontiac Vibe (2009–2010), Toyota Camry, Corolla, RAV4, Avalon, 4Runner, Matrix, Sienna, Solara, Paseo and Tercel across listed years.
• Parts interchange examples: 88975496, 8946502340, 8946533450 and other OEM cross-reference numbers.

How does this Denso sensor protect the engine and improve drivability?

While it’s not a fix-all, a functioning oxygen sensor helps the engine control unit (ECU read) maintain correct air-fuel ratios, which supports smoother idle and consistent performance. Denso’s construction and filter features reduce the chance of sensor poisoning so it keeps accuracy longer than untreated elements.

• Aluminum oxide trap layer guards the ceramic element from silicone and lead contamination.
• PTFE filtering helps block particles that can degrade sensor response.
• Refined zirconia element yields faster, more precise oxygen readings.

Is the 234-4622 easy to install and what are its physical details?

This part is made as a direct fit replacement with a 4-wire harness and a 12.60-inch lead so it lines up with factory connectors in the specified vehicles. The sensor’s compact dimensions and stainless steel housing simplify installation and help it withstand the under-hood environment.

• Wiring: 4-wire harness, 12.60 inches long for OEM connector compatibility.
• Construction: corrosion-resistant stainless steel housing for durability.
• Dimensions & weight: approx. 5.75 x 2.19 x 1.88 inches, 0.25 lb; sold individually.

When should I replace an oxygen sensor and what performance changes should I expect?

Replace a sensor if the vehicle shows a persistent check engine light tied to O2 sensor codes, rough idle, or if fuel economy noticeably worsens. Installing a correct, well-built replacement like the 234-4622 helps restore accurate oxygen monitoring and stabilize fuel trim adjustments.

• Common replacement triggers: diagnostic trouble codes, poor fuel economy, rough running or failed emissions tests.
• Expected improvements: steadier idle, more consistent combustion control, and more reliable emission readings for diagnostics.

Who is this for: Automotive technicians, DIY mechanics and fleet managers who need a dependable, OE-quality narrow-band oxygen sensor for select Lexus, Toyota and Pontiac vehicles. If you require a precise fit, OEM cross-reference compatibility and contamination protection in a long-lasting sensor, the Denso 234-4622 is built for routine maintenance and targeted repairs where OEM-level performance is expected.