Denso 234-4501 Oxygen Sensor - Downstream Right

Denso 234-4501 Oxygen Sensor for Toyota RAV4

The Denso 234-4501 is an OE-style heated oxygen sensor built for precise replacement and consistent signal performance. It is a specific-fit sensor for the downstream right position on select 2006-2012 Toyota RAV4 models, making it a direct-match option for service work that calls for the correct connector, thread, and harness layout.

Denso’s OE Style line focuses on exact fitment and factory-level construction. For Toyota RAV4 oxygen sensor replacement, this part is engineered to match the original application and help restore proper exhaust monitoring, fuel control, and drivability.

Key Features

• OE Style replacement oxygen sensor for exact-fit service
• Heated sensor design for faster operating response
• Specific fit for the downstream right location
• 4-wire configuration with female connector
• Threaded mounting with 0.708 in. thread diameter
• 15.35 in. wiring harness length for application-specific routing
• Built to OE standards for replacement accuracy

Detailed Product Overview

Denso 234-4501 is designed for 2006-2012 Toyota RAV4 downstream right oxygen sensor replacement. The sensor uses a heated design and a 4-wire layout to support accurate exhaust feedback once the engine reaches operating temperature. Its specific-fit construction helps ensure the connector, harness length, and threaded mount align with the original vehicle setup.

This OE-style oxygen sensor also incorporates Denso’s aluminum oxide trap layer, which helps protect the ceramic element from silicone and lead contamination. That added protection supports stable sensor operation, improved fuel efficiency, and longer service life in demanding exhaust environments. This part cross-references Bosch 18014 for the same application.

Common Issues This Part Can Help Resolve

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Poor fuel economy caused by a slow or inaccurate sensor signal
• Rough idle or hesitation tied to exhaust feedback issues
• Failed emissions testing due to a worn downstream sensor

Installation Notes and Tips

Verify the downstream right position before installation on your Toyota RAV4. Confirm the connector style, wire count, and thread diameter match the original sensor before removal. Because oxygen sensors are exposed to heat and corrosion, use proper exhaust service practices and inspect the harness routing to avoid strain on the connector after installation.

Quality Assurance

Denso manufactures and tests this OE Style oxygen sensor to strict original-equipment standards for fit and function. The 234-4501 is built as a direct replacement for select Toyota RAV4 applications, with attention to first-time fit and dependable sensor performance.