Denso 234-4387 Oxygen Sensor - Downstream or Upstream

Reliable Oxygen Sensor for Suzuki Esteem and Grand Vitara

The Denso OE Style Oxygen Sensor 234-4387 is designed specifically for Suzuki Esteem and Grand Vitara models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases precisely.

• Heated sensor type for faster response times
• Specific fit for Suzuki Esteem and Grand Vitara
• Threaded mounting type with 0.708 inch thread diameter
• Four-wire design with male connector for secure connection
• Wiring harness length of 20.28 inches 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 reliable performance for vehicles requiring precise emissions control components. The 234-4387 sensor maintains factory standards for fit, function, and durability, making it a suitable replacement part for Suzuki vehicles.

Detailed Product Description

This Denso oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The sensor’s four-wire configuration includes two wires for the heater circuit and two for the sensor signal, providing accurate data to the engine control unit. Its threaded mounting type with a 0.708 inch diameter ensures a secure and leak-free installation. The 20.28-inch wiring harness length offers flexibility during installation while maintaining a clean and reliable connection with the vehicle’s wiring system.

Common Issues Addressed by This Oxygen Sensor

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture
• Increased emissions failing regulatory inspections
• Engine performance problems such as rough idling or hesitation
• Failed emissions tests related to sensor malfunction

Installation Notes and Tips

Ensure the vehicle is cool before beginning installation to avoid burns. Use the correct socket size for the 0.708 inch threaded sensor to prevent damage. Verify the male connector matches the vehicle’s wiring harness for a secure fit. Avoid twisting or stretching the 20.28-inch wiring harness during installation to maintain sensor integrity. It is recommended to clear any diagnostic trouble codes after installation to reset the engine control unit.

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet strict quality standards and original equipment specifications. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship. Using this sensor helps maintain emissions compliance and engine efficiency for Suzuki Esteem and Grand Vitara models.