Denso 234-4339 Oxygen Sensor - Upstream

Reliable Oxygen Sensor for Buick, Cadillac, Chevrolet, and GMC Vehicles

The Denso OE Style Oxygen Sensor 234-4339 is designed to provide precise emissions control for specific vehicle models. Engineered with a heated sensor and a threaded mounting type, this oxygen sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor for faster response times
• Specific fit for Buick, Cadillac, Chevrolet, GMC, Isuzu, and Saab models
• Threaded mounting type with 0.708-inch thread diameter
• 15.75-inch wiring harness length with 4 wires and female connector
• Part number 234-4339 for exact replacement

About the Denso OE Style Product Line

The OE Style line from Denso focuses on delivering parts that meet original equipment specifications. This oxygen sensor 234-4339 is built to match the fit, form, and function of the factory-installed sensor, ensuring compatibility and reliable performance for your vehicle’s emission control system.

Detailed Product Description

This Denso oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 15.75-inch wiring harness with four wires and a female connector ensures a secure and proper electrical connection. Its threaded mounting type with a 0.708-inch diameter allows for straightforward installation in compatible vehicles. This sensor is specifically designed for models such as the Buick Lucerne, Cadillac DTS, Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, and Saab 9-7x, providing a precise fit and reliable operation.

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 issues

Installation Notes and Tips

Before installation, ensure the vehicle is cool to avoid burns. Disconnect the battery to prevent electrical shorts. Use the correct tools to remove the old sensor and install the new Denso 234-4339 oxygen sensor by threading it securely into place. Verify the wiring harness length and connector type match your vehicle’s specifications. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper sensor operation.

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet strict quality standards and original equipment specifications. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship to ensure dependable performance and longevity.