Denso 234-4215 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4215

Denso 234-4215 is a heated, specific-fit oxygen sensor built for direct replacement in downstream applications. It is engineered for 1993-1998 Toyota Supra, 1999-2003 Lexus RX300, and 2001-2003 Toyota Highlander models, with OE-style fitment for accurate sensor placement and dependable exhaust monitoring.

Key Features

• Heated oxygen sensor for faster operating temperature and stable signal output
• Specific-fit design for direct replacement on the listed applications
• 19.69-inch wiring harness length for proper routing
• 4-wire configuration for the correct OE-style electrical connection
• OE Style product line focused on exact replacement and first-time fit
• Built with an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination

Product Details

The Denso OE Style line is built to match original equipment requirements for fit, function, and installation location. This downstream oxygen sensor helps the engine control system monitor exhaust oxygen content after the catalytic converter, supporting accurate fuel control and emissions management. For drivers searching for a downstream oxygen sensor for 1999-2003 Lexus RX300 or a replacement oxygen sensor for 2001-2003 Toyota Highlander, Denso 234-4215 provides the correct OE-style configuration. This part cross-references Bosch 13338 for the same application.

What This Sensor Helps Address

• Check engine light caused by a failing downstream oxygen sensor
• Rough fuel control from inaccurate exhaust oxygen readings
• Reduced fuel economy related to sensor degradation
• Emissions test failures tied to sensor response issues
• Slow or inconsistent sensor output from contamination or age

Installation Notes

Confirm the downstream position, connector style, wire count, and harness length before installation. Route the harness away from hot exhaust components and inspect the connector and wiring for damage before connecting the new sensor. Verify the application by year, make, model, and position for Toyota Supra, Lexus RX300, and Toyota Highlander fitment.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for precise replacement fitment and consistent performance. The OE Style design supports accurate installation on the listed vehicles, including 1993-1998 Toyota Supra, 1999-2003 Lexus RX300, and 2001-2003 Toyota Highlander.