Denso 234-4168 Oxygen Sensor - Downstream, Downstream Front or Downstream Left

Reliable Oxygen Sensor for Lexus, Toyota, and Scion Vehicles

The Denso OE Style Oxygen Sensor 234-4168 is designed to provide precise emissions control for select Lexus, Toyota, and Scion models. This heated oxygen sensor ensures accurate air-fuel mixture readings to maintain optimal engine performance and reduce harmful emissions.

• Heated sensor type for faster response times
• Specific fit for Lexus Highlander, RX330, Toyota Sienna, Venza, Scion iQ, and xB
• Threaded mounting type with 0.708-inch thread diameter
• Four-wire design with male connector for secure electrical connection
• 13.78-inch wiring harness length for proper installation

About the Denso OE Style Product Line

The OE Style line from Denso offers oxygen sensors engineered to meet original equipment specifications. This ensures compatibility and performance consistent with factory-installed parts. The 234-4168 oxygen sensor maintains the standards expected in emissions control systems for the specified Lexus, Toyota, and Scion vehicles.

Detailed Product Description

The Denso 234-4168 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions sooner after engine start. Its four-wire configuration supports both the sensor signal and heater circuit, while the male connector ensures a reliable electrical connection. The threaded mounting type with a 0.708-inch diameter allows for secure installation in the exhaust system. With a wiring harness length of 13.78 inches, this sensor fits precisely in the designated locations on compatible Lexus Highlander, RX330, Toyota Sienna, Venza, and Scion iQ and xB models.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved engine performance
• Helps resolve check engine light codes related to oxygen sensor failure
• Reduces increased emissions caused by faulty sensors
• Improves fuel economy by ensuring proper combustion
• Prevents rough idling and engine hesitation linked to sensor issues

Installation Notes and Tips

• Ensure vehicle compatibility with Lexus Highlander, RX330, Toyota Sienna, Venza, or Scion iQ and xB models before installation
• Use proper tools to remove the old sensor and avoid damaging the threaded mounting hole
• Check wiring harness length (13.78 inches) to confirm fitment and routing
• Verify the male connector matches the vehicle’s wiring harness for a secure connection
• Follow manufacturer torque specifications when installing the sensor

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet strict quality standards and original equipment specifications. While specific warranty details for part number 234-4168 may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship. This ensures reliable performance and durability in emissions control applications.