Denso 234-4647 Oxygen Sensor - Downstream, Downstream Right or Upstream Left

Reliable Oxygen Sensor for Select GM and Isuzu Vehicles

The Denso OE Style 234-4647 oxygen sensor is designed specifically for a range of Buick, Chevrolet, GMC, Isuzu, Oldsmobile, Pontiac, and Saturn models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle’s engine management system.

• Heated sensor type for faster response times
• Specific fit for select GM and Isuzu vehicles
• 12.60-inch wiring harness length for proper installation
• Four-wire design with female connector for secure connection
• Threaded mounting type with 0.708-inch thread diameter

About the Denso OE Style Product Line

The OE Style line from Denso offers oxygen sensors engineered to meet original equipment specifications. This ensures compatibility and reliable performance for vehicles requiring precise emissions control components. The 234-4647 sensor maintains factory standards for fit, form, and function, making it a suitable replacement part for maintaining vehicle emissions compliance.

Product Details and Specifications

This oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving sensor response and reducing emissions during cold starts. The 12.60-inch wiring harness length provides adequate reach for installation in the engine bay, while the four-wire configuration supports both the sensor signal and heater circuit. The female connector ensures a secure and proper electrical connection. The sensor mounts via a threaded fitting with a 0.708-inch diameter, matching factory mounting points on compatible vehicles.

Compatible Vehicles and Applications

• Buick Allure, LaCrosse, Lucerne, Rainier, Rendezvous
• Chevrolet Astro, Avalanche, Corvette, Equinox, Impala, Malibu, Monte Carlo, Trailblazer EXT, Uplander
• GMC Envoy XL, Envoy XUV, Safari, Sierra, Terrain, Yukon
• Isuzu Ascender, Rodeo
• Oldsmobile Aurora, Alero, Intrigue
• Pontiac Aztek, Bonneville, Grand Prix, G6, Montana, Torrent
• Saturn Aura, Relay, Vue

Common Issues Addressed by This Oxygen Sensor

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture
• Increased emissions and failed emissions tests
• Engine hesitation or rough idling caused by sensor malfunction
• Reduced engine performance and drivability problems

Installation Notes and Tips

Ensure the vehicle is cool before beginning installation to avoid burns. Disconnect the battery to prevent electrical shorts. Remove the old oxygen sensor carefully using an oxygen sensor socket or appropriate tool. Verify the thread size and connector type match the Denso 234-4647 sensor. Apply anti-seize compound to the threads if recommended by the vehicle manufacturer. Connect the female connector securely and route the wiring harness away from hot or moving parts.

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet or exceed OEM standards for durability and performance. This part number 234-4647 undergoes rigorous testing to ensure reliable operation under normal driving conditions. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.