Denso 234-4908 Oxygen Sensor - Downstream

Overview of the Denso OE Style Oxygen Sensor 234-4908

The Denso OE Style Oxygen Sensor 234-4908 is designed specifically for select Scion, Subaru, and Toyota models, including the 86, BRZ, and FR-S. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle’s engine management system.

• Heated sensor type for faster warm-up and improved efficiency
• Specific fit for Scion 86, Subaru BRZ, and Toyota FR-S models
• Threaded mounting type with 0.708-inch thread diameter for secure installation
• Four-wire design with a male connector for reliable electrical connection
• Wiring harness length of 20.24 inches to accommodate factory routing

Detailed Features and Specifications

The Denso 234-4908 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, reducing emissions during cold starts. Its four-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The sensor’s threaded mounting type with a 0.708-inch diameter matches factory specifications for a secure and leak-free fit. The 20.24-inch wiring harness length is designed to fit the original equipment routing, minimizing installation complexity. The male connector ensures compatibility with the vehicle’s existing wiring harness.

About the OE Style Product Line

The Denso OE Style product line focuses on delivering oxygen sensors that meet original equipment specifications for fit, form, and function. This line is engineered to provide reliable emissions control and engine management performance, making it suitable for direct replacement in vehicles like the Scion 86, Subaru BRZ, and Toyota FR-S. The OE Style sensors maintain factory standards to support vehicle compliance with emissions regulations.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved fuel efficiency
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce harmful emissions by ensuring proper catalytic converter operation
• Eliminates rough idling or poor engine performance caused by faulty sensors
• Prevents failed emissions tests due to sensor malfunction

Installation Notes and Tips

When installing the Denso 234-4908 oxygen sensor, ensure the vehicle is cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the thread size and connector type match the original sensor. Avoid damaging the wiring harness during installation and confirm the sensor is securely threaded to prevent exhaust leaks. After installation, clear any diagnostic trouble codes to reset the engine control unit.

Quality Assurance and Warranty

Denso oxygen sensors, including the 234-4908, are manufactured to meet strict quality standards for durability and performance. The OE Style line is designed to match original equipment specifications, ensuring reliable operation. Warranty coverage details vary by distributor but typically include protection against defects in materials and workmanship.