Denso 234-4700 Oxygen Sensor - Downstream, Downstream Right or Upstream

Denso 234-4700 Oxygen Sensor for Universal Fitment

Denso 234-4700 is a heated oxygen sensor built for universal applications across a wide range of import vehicles. It is engineered for direct replacement use where accurate exhaust feedback, stable engine management, and proper emissions control are required.

Key Features

• Heated oxygen sensor with a 4-wire design for faster operating temperature
• Universal fit with threaded mounting for broad application coverage
• 11.77-inch wiring harness length for installation flexibility
• 0.708-inch thread diameter for specified exhaust bung fitment
• Built to OE standards for exact replacement fit and function
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

Denso 234-4700 is part of Denso’s Universal line, which focuses on replacement sensors that match OE-style performance and fitment requirements. The sensor is precision built and tested to strict original-equipment standards, helping maintain accurate air-fuel feedback for engine control systems. This matters on vehicles such as the Nissan Altima, Nissan Maxima, Subaru Forester, and INFINITI QX4, where downstream and upstream sensor applications depend on reliable signal response. This part cross-references Bosch (e.g., 13052, 13226) for the same application.

What This Oxygen Sensor Helps Address

• Check engine light caused by a failing oxygen sensor
• Incorrect fuel trim readings from a slow or contaminated sensor
• Reduced fuel economy due to poor exhaust feedback
• Emissions test failures tied to sensor performance
• Rough idle or drivability issues related to air-fuel control

Installation Notes and Fitment Tips

Compatible With 1988-1993 BMW 535i, upstream; 1988-1992 BMW 735i and 735iL, upstream; 1991-1993 BMW M5, upstream; 1994-1996 Mercedes-Benz C220, C280, C36 AMG, E320, S320, S420, S500, S600, SL320, and SL600, upstream or downstream as listed; 1995 Volkswagen Passat, upstream; and multiple Nissan, INFINITI, Subaru, and Mercury applications listed in the fitment data. Verify sensor position, thread size, and harness routing before installation. Use the vehicle’s original connector and exhaust location as reference, and confirm the application notes for California, Canada, clean air vehicle, and production-date exceptions.

Quality Assurance

Denso manufactures and tests this oxygen sensor to strict OE standards for consistent replacement quality. The sensor uses Denso’s protective aluminum oxide trap layer to help shield the ceramic element from contamination, supporting long-term performance in demanding exhaust environments.