Denso 234-4515 Oxygen Sensor - Downstream or Downstream Right

Denso OE Style Oxygen Sensor 234-4515

Denso 234-4515 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for downstream monitoring on select Lexus LS460 and LS600h applications, with the connector, wiring length, and threaded mounting designed to match the original layout.

The OE Style line focuses on direct-fit replacement for factory-style service. For Lexus LS460 and Lexus LS600h owners searching for a downstream oxygen sensor replacement, this Denso sensor is built to restore accurate exhaust feedback and maintain proper engine management.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit design for direct replacement
• 4-wire configuration with male connector
• Threaded mounting type for OE-style installation
• Wiring harness length: 26.38 in.
• Thread diameter: 0.708 in.
• Built to OE standards for exact replacement fitment
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Detailed Description

Denso 234-4515 is an OE Style oxygen sensor intended for downstream use on select Lexus LS460 and LS600h models. It is manufactured and tested to OE-level standards, with precision-built dimensions that support direct replacement and proper sensor placement. The heated design helps the sensor reach operating temperature efficiently, while the specific-fit construction supports a clean installation on the original threaded mount.

This part cross-references Toyota 8946550170 for the same application. It is also a direct replacement option for Lexus LS460 downstream and Lexus LS600h downstream right applications where OE-style fitment is required.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect exhaust oxygen readings at the downstream sensor location
• Reduced fuel economy caused by inaccurate air-fuel feedback
• Slow sensor response from a worn heated oxygen sensor
• Fitment issues from a non-specific replacement part

Installation Notes and Tips

Fits 2007-2013 Lexus LS460, downstream. Fits 2009-2013 Lexus LS460, downstream right. Fits 2008-2015 Lexus LS600h, downstream right. Fits 2016 Lexus LS600h, downstream right.

Confirm the sensor position before ordering, since this part is listed for downstream and downstream right applications. Verify connector style, wire count, and thread size against the original sensor to ensure proper installation on your Lexus LS460 or Lexus LS600h.

Quality Assurance

Denso manufactures this oxygen sensor to strict OE standards and tests each component for replacement accuracy and fit. The design includes an aluminum oxide trap layer to help protect the sensing element from silicone and lead contamination, supporting long-term sensor performance in normal service.