Denso 234-4277 Oxygen Sensor - Upstream

Overview of the Denso OE Style Oxygen Sensor 234-4277

The Denso OE Style Oxygen Sensor 234-4277 is designed specifically for Mitsubishi Lancer models, providing precise emissions control and engine performance monitoring. This heated oxygen sensor features a threaded mounting type and a 15.75-inch wiring harness, ensuring a secure and accurate fit.

• Heated oxygen sensor for faster response times
• Specific fit for Mitsubishi Lancer vehicles
• Threaded mounting with 0.708-inch thread diameter
• 15.75-inch wiring harness length with 4 wires
• Female connector for direct compatibility

Detailed Product Features and Specifications

The Denso 234-4277 oxygen sensor is a heated sensor designed to provide accurate air-fuel mixture readings to the engine control unit (ECU). Its 15.75-inch wiring harness length allows for proper routing and connection within the engine bay. The sensor includes four wires and a female connector, ensuring compatibility with the vehicle’s existing wiring harness. The threaded mounting type with a 0.708-inch diameter allows for secure installation in the exhaust system. This sensor is engineered for specific fitment, making it suitable for Mitsubishi Lancer models requiring this exact part number.

About the Denso OE Style Product Line

The OE Style line from Denso focuses on delivering parts that meet original equipment specifications. This ensures that the oxygen sensor 234-4277 matches the fit, form, and function of the factory-installed sensor on Mitsubishi Lancer vehicles. The OE Style sensors are designed to integrate seamlessly with the vehicle’s emission control system, supporting compliance with emissions standards and maintaining engine efficiency.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for proper air-fuel ratio management
• Helps resolve rough idling caused by faulty sensor readings
• Reduces engine hesitation and poor acceleration issues
• Supports emission system compliance and reduces exhaust emissions
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Denso 234-4277 oxygen sensor on a Mitsubishi Lancer, ensure the engine is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. The 15.75-inch wiring harness length provides flexibility for routing, but verify connector compatibility before installation. Thread the sensor carefully to avoid cross-threading and torque to manufacturer specifications for a secure fit.

Quality Assurance and Warranty

Denso oxygen sensors, including the 234-4277, are manufactured to meet strict quality standards and original equipment specifications. This ensures reliable performance and durability in emission control applications. Warranty coverage details vary by distributor but typically include protection against defects in materials and workmanship.