Denso 234-4285 Oxygen Sensor - Downstream, Downstream Right or Upstream Right

Reliable Oxygen Sensor for Buick, Chevrolet, GMC, and More

The Denso OE Style Oxygen Sensor 234-4285 is designed to provide precise emissions control for specific vehicle models including Buick, Chevrolet, GMC, and others. This heated oxygen sensor ensures accurate air-fuel mixture readings to maintain optimal engine performance and emissions compliance.

• Heated sensor type for faster response times
• Specific fit for select Buick, Chevrolet, GMC, Isuzu, Oldsmobile, Pontiac, and Saab models
• Threaded mounting type with 0.708 inch thread diameter
• Four-wire design with female connector for secure installation
• 13.19-inch wiring harness length for proper fitment

About the Denso OE Style Product Line

The OE Style line from Denso focuses on delivering oxygen sensors that meet original equipment specifications. This ensures compatibility and performance consistent with factory-installed parts. The 234-4285 oxygen sensor is engineered to match the exact fit and function required by the specified vehicle models, supporting reliable emissions control and engine management.

Detailed Product Description

The Denso 234-4285 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving sensor response and reducing emissions during cold starts. Its four-wire configuration includes a heater circuit and signal wires, providing accurate oxygen level readings to the engine control unit. The sensor’s threaded mounting type with a 0.708-inch diameter ensures a secure and leak-free installation. With a 13.19-inch wiring harness length and female connector, this sensor is designed for a precise fit in vehicles such as the Chevrolet Colorado, GMC Canyon, Buick Rainier, and Saab 9-7x.

Common Applications and Issues Addressed

• Restores proper air-fuel ratio monitoring for improved fuel efficiency
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce harmful emissions by providing accurate feedback to the engine control module
• Prevents rough idling and engine hesitation caused by faulty sensor readings
• Supports compliance with emissions testing requirements

Installation Notes and Tips

When installing the Denso 234-4285 oxygen sensor, ensure the engine is cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the wiring harness length and connector type match the vehicle’s specifications before installation. Apply anti-seize compound to the sensor threads if recommended by the vehicle manufacturer to facilitate future removal. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper operation.

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet strict quality standards and original equipment specifications. This part number 234-4285 undergoes rigorous testing to ensure durability and reliable performance in emissions control systems. Warranty coverage details should be confirmed with the parts provider or vehicle manufacturer.