Denso 234-4200 Oxygen Sensor - Downstream or Upstream

Reliable Oxygen Sensor for Audi, BMW, Mercedes-Benz, and Volkswagen

The Denso Universal Oxygen Sensor 234-4200 is designed to provide accurate emissions monitoring for a wide range of vehicles including Audi A4, BMW 325i, and Mercedes-Benz S320. This heated oxygen sensor features a universal fit with a threaded mounting type, making it a versatile choice for various models.

• Heated sensor type for faster response times
• Universal fit compatible with multiple makes and models
• Threaded mounting type with 0.708 thread diameter
• 11.77-inch wiring harness length for flexible installation
• Four-wire design for reliable signal transmission

Detailed Features of the Denso 234-4200 Oxygen Sensor

The Denso 234-4200 oxygen sensor is engineered with a heated element to ensure quicker sensor activation and improved fuel efficiency. Its universal design allows compatibility with various vehicles such as the BMW 318i, Audi A6 Quattro, and Volkswagen Golf. The sensor includes a threaded mounting type with a 0.708 thread diameter, ensuring secure installation in the exhaust system. The 11.77-inch wiring harness length provides ample reach for most engine compartments, while the four-wire configuration supports both the sensor signal and heater circuit for optimal performance.

About the Denso Universal Product Line

The Universal product line from Denso offers oxygen sensors designed to fit a broad range of vehicles without sacrificing quality or performance. This line focuses on providing reliable emission control components that meet OEM specifications, making the 234-4200 a practical option for technicians servicing multiple vehicle makes including Volvo, Mercedes-Benz, and Volkswagen.

Common Applications and Issues Addressed

• Restores accurate oxygen level readings for engine control units
• Helps resolve rough idling and poor fuel economy
• Reduces emissions by ensuring proper air-fuel mixture
• Prevents check engine light triggers related to oxygen sensor faults
• Improves overall engine performance and drivability

Installation Notes and Tips

When installing the Denso 234-4200 oxygen sensor, ensure the threaded mounting hole is clean and free of debris. The 11.77-inch wiring harness length allows for flexible routing, but avoid sharp bends or contact with hot engine components. Use appropriate torque specifications to avoid sensor damage. This sensor is compatible with vehicles such as the BMW 530i and Audi A8 Quattro, so verify fitment before installation.

Quality Assurance and Warranty

Denso oxygen sensors are manufactured to meet strict quality standards and OEM specifications. The 234-4200 part number undergoes rigorous testing to ensure durability and accurate emissions control. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship to support long-term reliability.