Denso 234-4931 Oxygen Sensor - Downstream Left or Downstream Right

Denso OE Style Oxygen Sensor 234-4931

Denso 234-4931 is an OE-style heated oxygen sensor built for direct replacement in select Toyota and Lexus applications. It is engineered for a specific fit and uses a 4-wire, threaded design with a 9.49 in. wiring harness for a clean, factory-style installation.

For drivers searching for a downstream oxygen sensor for Toyota 4Runner, Toyota Land Cruiser, or Lexus LX570, this Denso sensor is built to match the original configuration and connector style. The OE Style line focuses on exact replacement fitment and consistent sensor response.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for direct replacement applications
• 4-wire construction with male connector
• Threaded mounting type with 0.708 in. thread diameter
• 9.49 in. wiring harness length
• OE-style replacement for select Toyota and Lexus vehicles

OE Style Design Details

Denso’s OE Style product line is built around factory-matched fit and sensor performance. This oxygen sensor uses precision-built components for exact replacement, and Denso incorporates an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination. That design supports stable engine management, fuel control, and long service life in demanding exhaust conditions.

This part cross-references NTK 24560 for the same application.

Vehicle Fitment

• Fits 2017-2019 Lexus LX570, downstream right.
• Fits 2014-2015 Lexus LX570, downstream right.
• Fits 2013-2019 Toyota 4Runner, downstream right.
• Fits 2014-2019 Toyota Land Cruiser, downstream right.
• Fits 2016 Lexus LX570, downstream left.
• Fits 2013-2014 Toyota FJ Cruiser, downstream right.

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
• Rougher engine operation tied to aging emissions sensors
• Failed emissions inspection from a faulty sensor signal

Installation Notes

Confirm the connector, wire count, and downstream position before installation. This sensor is a specific-fit, threaded replacement, so matching the original mounting location and harness routing is important for proper installation. Verify vehicle application by year, model, and sensor position before ordering.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for fit and performance consistency. The 234-4931 is built as a direct replacement part for the listed Toyota and Lexus applications.