Denso 234-4496 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4496

Denso 234-4496 is an OE-style heated oxygen sensor built for specific-fit replacement on select Porsche applications. It is engineered to match factory fit and signal requirements, with a threaded mounting design and a female 4-wire connector for direct replacement service.

For Porsche Cayenne, Boxster, Cayman, and 911 downstream oxygen sensor service, this Denso oxygen sensor is built to the same strict OE standards used in factory-style emissions control repairs. The 234-4496 part number is a direct-fit option for technicians and owners looking for a precise replacement on the correct downstream location.

Key Features

• OE Style replacement oxygen sensor from Denso
• Heated sensor design for faster operating readiness
• Specific fit for select Porsche downstream applications
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• 31.57 in. wiring harness length for application-specific routing
• Built to help maintain accurate exhaust feedback and emissions system performance

Product Details

Denso’s OE Style line focuses on exact replacement fitment and factory-level build quality. This oxygen sensor uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable sensor operation over time. If you are replacing a downstream oxygen sensor on a Porsche Cayenne, Porsche Boxster, Porsche Cayman, or Porsche 911, part number 234-4496 is designed for the specified application and connector layout.

This part cross-references Bosch 16147 and NTK 25659 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect exhaust oxygen readings from a worn downstream sensor
• Reduced fuel economy caused by inaccurate air-fuel feedback
• Emissions test failures tied to sensor response issues
• Driveability concerns linked to aging heated oxygen sensor operation

Installation Notes

• Verify the vehicle year, model, and downstream sensor position before ordering.
• Match the 4-wire female connector and threaded mounting style to the original part.
• Inspect the harness routing and connector condition during replacement.
• Confirm thread diameter and sensor location on the exhaust before installation.
• Clear diagnostic trouble codes after installation and verify proper sensor operation.

Quality Assurance

Denso manufactures and tests this OE Style oxygen sensor to strict original-equipment standards for fit, function, and durability. The 234-4496 is built as a precise replacement for the listed Porsche applications, with materials and contamination protection intended to support long-term sensor performance.