Denso 234-9301 Air / Fuel Ratio Sensor - Upstream

Reliable Air/Fuel Ratio Sensor for Lexus, Toyota, and Pontiac Vehicles

The Denso OE Style 234-9301 Air/Fuel Ratio Sensor is designed to provide precise emissions control for select Lexus, Toyota, and Pontiac models. This heated sensor ensures accurate air-fuel mixture readings, helping maintain optimal engine performance and emissions compliance.

• Heated sensor type for faster response times
• Specific fit for Lexus, Toyota, and Pontiac models including Corolla, CT200h, Prius, Prius Plug-In, Prius V, and Vibe
• 10.75-inch wiring harness length for proper installation
• Four-wire configuration with male connector for secure connection
• Thread diameter of 0.709 inches for exact fitment
• Regular grade type ensuring standard durability and performance

About the Denso OE Style Product Line

The OE Style line from Denso focuses on delivering parts that meet original equipment specifications. The 234-9301 Air/Fuel Ratio Sensor is engineered to match the fit, form, and function of the factory-installed sensor, providing reliable operation and compatibility with the vehicle’s emission control system.

Detailed Product Description

This Denso 234-9301 Air/Fuel Ratio Sensor is a heated sensor designed specifically for certain Lexus, Toyota, and Pontiac vehicles. Its 10.75-inch wiring harness length and four-wire setup with a male connector ensure a precise and secure connection to the vehicle’s wiring system. The sensor’s thread diameter of 0.709 inches guarantees proper installation in the exhaust system. As a regular grade sensor, it offers dependable performance suitable for standard driving conditions. This sensor plays a critical role in monitoring the air-fuel mixture, enabling the engine control unit to adjust fuel delivery for efficient combustion and reduced emissions.

Common Applications and Issues Addressed

• Helps resolve rough idling caused by incorrect air-fuel mixture readings
• Reduces engine hesitation and poor acceleration linked to faulty sensors
• Prevents increased emissions and failed emissions tests
• Addresses check engine light triggers related to air/fuel ratio sensor faults
• Improves fuel economy by ensuring accurate sensor feedback

Installation Notes and Tips

Ensure the vehicle is cool before attempting sensor replacement to avoid burns. The 234-9301 sensor’s specific fitment requires matching the sensor thread diameter and connector type to the vehicle’s harness. Verify compatibility with Lexus Corolla, CT200h, Toyota Prius series, and Pontiac Vibe models before installation. Use appropriate tools to avoid damaging the sensor or wiring harness during installation.

Quality Assurance and Warranty

Denso manufactures the 234-9301 Air/Fuel Ratio Sensor to meet strict quality standards consistent with original equipment. While specific warranty details are not provided here, Denso parts typically come with manufacturer-backed warranties ensuring reliability and performance when installed correctly.