Denso 234-4543 Oxygen Sensor - Downstream Front

Denso 234-4543 Oxygen Sensor for Acura TL

The Denso 234-4543 is an OE-style heated oxygen sensor built for precise replacement and consistent signal performance. It is engineered for the 2010-2014 Acura TL downstream front position, with a specific-fit design that supports a first-time fit on the correct application.

Key Features

• OE Style replacement oxygen sensor for emission control service
• Heated sensor design for faster operating response
• Specific fit for the downstream front position on Acura TL applications
• 4-wire configuration with female connector
• Threaded mounting with 0.708 in. thread diameter
• 14.37 in. wiring harness length for application-specific routing
• Built with Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination

Detailed Description

Denso 234-4543 is an oxygen sensor designed for direct replacement in 2010-2014 Acura TL models at the downstream front location. As part of Denso’s OE Style line, this sensor is manufactured and tested to OE standards for accurate fitment and dependable operation. The heated, 4-wire design supports proper exhaust monitoring, while the threaded mounting and specific connector layout help simplify replacement on the correct vehicle application. This part cross-references Bosch 18030 and Honda 36532RK2A01 for the same application. For Acura TL owners searching for a downstream front oxygen sensor, Denso 234-4543 provides an OE-style service part matched to the original configuration.

What This Part Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback from a worn sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Slow sensor response during closed-loop operation
• Emission control faults on 2010-2014 Acura TL models

Installation Notes and Tips

Verify the downstream front position before installation and confirm connector style, wire count, and thread size against the original sensor. Use proper oxygen sensor service tools to avoid damaging the threaded mounting area, and route the harness to match the factory path on the Acura TL. Because this is a specific-fit part, confirm the vehicle year and position match the listed application before replacement.

Quality Assurance

Denso manufactures this OE Style oxygen sensor to strict original-equipment standards and tests each component for fit and performance consistency. The design includes an aluminum oxide trap layer intended to help protect the sensing element from contamination, supporting long-term service in emission control applications.