Denso 234-4097 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4097

Denso 234-4097 is an OE-style heated oxygen sensor built for exact replacement and consistent signal performance. It is a specific-fit sensor for downstream applications on select Acura RL and Acura TL models, with the correct connector, thread size, and wiring layout for a direct match.

Key Features

• OE Style replacement oxygen sensor for precise fit and function
• Heated sensor design for faster operating temperature and stable feedback
• Specific fit with 4-wire configuration and male connector
• 30.31 in. wiring harness length for application-matched routing
• Threaded mounting with 0.708 in. thread diameter
• Built to OE standards with Denso’s aluminum oxide trap layer for added protection against silicone and lead contamination

Detailed Description

This Denso oxygen sensor is engineered for downstream use on 1996-2004 Acura RL and 1995-1998 Acura TL applications. The Denso 234-4097 follows OE-style dimensions and electrical design, helping maintain accurate exhaust oxygen feedback for the engine management system. Denso’s OE-focused construction emphasizes first-time fit and consistent replacement performance, making it a practical choice for Acura RL and Acura TL owners servicing emissions control components.

This part cross-references Bosch 13093 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust feedback
• Slow sensor response from age, heat cycling, or contamination
• Emissions test failures tied to a faulty downstream oxygen sensor

Installation Notes and Tips

Verify the downstream sensor location before ordering and match the connector, wire count, and thread size to the original part. This sensor uses a threaded mounting design and a specific-fit configuration, so it should be installed in the correct exhaust position for the listed Acura RL and Acura TL applications. Inspect the harness routing and connector condition during replacement to avoid strain on the new sensor.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent replacement quality. The design includes an aluminum oxide trap layer intended to protect the ceramic element from silicone and lead contamination, supporting long service life and stable engine performance.