Denso 234-4555 Oxygen Sensor - Downstream

Overview of Denso OE Style Oxygen Sensor 234-4555

The Denso OE Style Oxygen Sensor 234-4555 is designed specifically for Ford Fiesta models, providing precise emission control through accurate oxygen level monitoring. This heated oxygen sensor features a threaded mounting type and a 13.19-inch wiring harness length for a secure and reliable fit.

• Heated oxygen sensor for faster response times
• Specific fit for Ford Fiesta vehicles
• Threaded mounting with 0.708-inch thread diameter
• 13.19-inch wiring harness length with 4 wires
• Male connector for direct compatibility

Detailed Product Features and Specifications

The Denso 234-4555 oxygen sensor is part of the OE Style product line, which focuses on delivering original equipment quality and fitment. This ensures that the sensor matches the exact specifications required by Ford Fiesta models, maintaining factory performance standards. The heated sensor type allows for quicker activation and improved fuel efficiency by accurately measuring exhaust oxygen levels. With a 0.708-inch threaded mounting and a male connector, installation is straightforward and secure. The 4-wire configuration supports both the sensor signal and heater circuit, while the 13.19-inch wiring harness length provides adequate reach for proper connection.

Common Applications and Problem Resolution

• Helps resolve engine performance issues related to incorrect air-fuel mixture
• Reduces emissions by providing accurate oxygen level data to the engine control unit
• Addresses check engine light triggers caused by faulty oxygen sensors
• Improves fuel economy by enabling precise fuel injection adjustments
• Prevents failed emissions tests due to sensor malfunction

Installation Notes and Tips

When installing the Denso 234-4555 oxygen sensor on a Ford Fiesta, ensure the engine is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Confirm the male connector aligns correctly with the vehicle’s wiring harness. It is recommended to apply anti-seize compound on the threads to facilitate future removal. Verify all electrical connections are secure before starting the engine.

Quality Assurance and Warranty

Denso’s OE Style oxygen sensors are manufactured to meet original equipment standards, ensuring reliable performance and durability. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship. This oxygen sensor is designed to maintain emission control system integrity and support compliance with environmental regulations.