Denso 234-4174 Oxygen Sensor - Downstream, Upstream or Upstream Right

Overview of the Denso OE Style Oxygen Sensor 234-4174

The Denso OE Style Oxygen Sensor 234-4174 is designed specifically for select Mercedes-Benz models, including the CL500, E55 AMG, and ML320. 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 activation and improved efficiency
• Specific fit for Mercedes-Benz models such as CL600, E320, and S500
• Threaded mounting type with a 0.708-inch thread diameter for secure installation
• Four-wire design with a female connector for reliable electrical connection
• Wiring harness length of 14.76 inches to accommodate factory routing

Detailed Features and Specifications

This oxygen sensor from Denso’s OE Style line is engineered to meet original equipment specifications, ensuring compatibility and performance for Mercedes-Benz vehicles like the SL500 and ML55 AMG. The heated sensor element allows the sensor to reach operating temperature quickly, reducing emissions during cold starts. The four-wire configuration supports both the sensor signal and heater circuit, while the female connector matches factory wiring harnesses for a plug-and-play replacement. The 0.708-inch threaded mounting type provides a secure fit in the exhaust system, and the 14.76-inch wiring harness length is designed to fit the specific routing requirements of the listed Mercedes-Benz models.

Compatible Vehicles and Common Applications

• Mercedes-Benz CL500, CL600
• Mercedes-Benz E55 AMG, E320, E430
• Mercedes-Benz ML55 AMG, ML320, ML430
• Mercedes-Benz S320, S430, S500, S600
• Mercedes-Benz SL320, SL500

This oxygen sensor is used to monitor exhaust gases and help regulate the air-fuel mixture for efficient combustion and emissions control. It addresses issues such as:

• 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

When installing the Denso OE Style Oxygen Sensor 234-4174, ensure the vehicle is cool to avoid burns. Use the correct socket size for the 0.708-inch threaded sensor to prevent damage. Verify the female connector matches the factory harness before installation. It is recommended to apply anti-seize compound on the threads to facilitate future removal. Follow the vehicle manufacturer’s torque specifications to avoid over-tightening.

Quality Assurance and Warranty

Denso’s OE Style product line is designed to meet or exceed original equipment standards, providing reliable performance and durability. This oxygen sensor undergoes rigorous testing to ensure accurate sensor output and heater function. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship to support long-term use in Mercedes-Benz vehicles.