Denso 234-4138 Oxygen Sensor - Downstream Right, Upstream or Upstream Left

Overview of the Denso OE Style Oxygen Sensor 234-4138

The Denso OE Style Oxygen Sensor 234-4138 is designed specifically for select Lexus and Toyota models, providing precise emissions control and engine performance monitoring. This heated oxygen sensor features a threaded mounting type and a male connector, ensuring a secure and accurate fit for your vehicle.

• Heated oxygen sensor for faster response times
• Specific fit for Lexus and Toyota models including 4Runner, FJ Cruiser, GS430, GX470, Land Cruiser, LS430, LX470, and SC430
• Threaded mounting with 0.708 inch thread diameter
• 4-wire configuration with male connector
• Wiring harness length of 8.27 inches for optimal installation

Detailed Product Features and Specifications

This Denso oxygen sensor is part of the OE Style product line, which focuses on delivering original equipment quality and fitment. The OE Style line is engineered to meet or exceed factory specifications, making it a reliable replacement for your vehicle’s emission control system. The 234-4138 sensor is a heated type, which means it includes an internal heating element to bring the sensor up to operating temperature quickly, improving fuel efficiency and reducing emissions during cold starts.

The sensor’s 4-wire design supports both the sensor signal and the heater circuit, while the male connector ensures compatibility with the vehicle’s wiring harness. The threaded mounting type with a 0.708 inch diameter allows for secure installation in the exhaust system. With a wiring harness length of 8.27 inches, this sensor provides sufficient reach for proper placement without excess slack.

Compatible Vehicles and Applications

• Designed for specific fitment on Lexus 4Runner, GS430, GX470, LS430, LX470, and SC430 models
• Compatible with Toyota 4Runner, FJ Cruiser, and Land Cruiser models
• Used to monitor oxygen levels in the exhaust for optimal air-fuel mixture control
• Helps maintain emissions compliance and engine performance

Installation Notes and Tips

• Ensure the vehicle is cool before installation to avoid burns
• Use appropriate tools to remove the old sensor and install the new threaded sensor securely
• Verify the connector gender matches the vehicle harness for proper connection
• Check for any exhaust leaks after installation to maintain sensor accuracy

Quality Assurance and Warranty

Denso’s OE Style oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. The 234-4138 sensor undergoes rigorous testing to comply with OEM specifications. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship to provide confidence in your purchase.