Genuine Denso Air Fuel Ratio Sensor 439000-0730

Optimize engine performance and fuel efficiency with the Denso Air Fuel Ratio Sensor 439000-0730 (SKU 22-121). This premium OEM-quality wideband oxygen sensor is engineered by Denso to precisely monitor the air-fuel mixture in your engine, enabling the ECU to maintain optimal combustion, reduce emissions, and maximize fuel economy for Suzuki Grand Vitara JB627 H27A and other applications.

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Key Features & Benefits

• Genuine Denso Quality - OEM-grade component built to exacting standards
• Wideband Technology - More accurate air-fuel ratio monitoring than standard oxygen sensors
• Improved Fuel Economy - Helps maintain optimal fuel mixture for better mileage
• Reduced Emissions - Keeps your vehicle running clean and compliant
• Enhanced Engine Performance - Prevents rich or lean running conditions
• Durable Construction - Built to withstand extreme temperatures and harsh conditions
• Direct Replacement - Perfect fit for Suzuki Grand Vitara applications

Technical Specifications

• Denso Part Number: 439000-0730 (4390000730)
• Sensor Type: Air Fuel Ratio Sensor (Wideband O2 Sensor / Lambda Sensor)
• Primary Application: Suzuki Grand Vitara JB627 H27A
• Weight: 0.25 kg

Vehicle Compatibility

This Denso air fuel ratio sensor is designed for Suzuki Grand Vitara JB627 with H27A engine and other compatible Suzuki applications. Always verify fitment for your specific vehicle.

CLICK HERE TO CHECK IF THIS FITS YOUR VEHICLE.

OEM Part Number Cross-Reference

This Denso air fuel ratio sensor replaces the following OEM part numbers:

• 1821366J00 (Suzuki)
• EGO-121 / EGO121

Common Symptoms of Faulty Air Fuel Ratio Sensors

• Check engine light illuminated (P0130-P0167 codes)
• Poor fuel economy
• Rough idle or engine hesitation
• Failed emissions test
• Loss of power during acceleration
• Strong fuel odor from exhaust
• Black smoke from exhaust (running rich)
• Engine running lean or rich

What Does an Air Fuel Ratio Sensor Do?

The air fuel ratio sensor (also called a wideband oxygen sensor or lambda sensor) monitors the oxygen content in the exhaust gases with greater precision than standard oxygen sensors. This allows the engine control unit (ECU) to make fine adjustments to the fuel injection system, maintaining the ideal air-fuel mixture for optimal performance, fuel economy, and emissions control across all driving conditions.

Why Choose Denso Air Fuel Ratio Sensors?

Denso is a world-leading OEM supplier of oxygen and air fuel ratio sensors, trusted by Suzuki and other major manufacturers worldwide. Their sensors are designed to meet or exceed original equipment specifications, ensuring accurate readings, long-lasting reliability, and optimal engine performance.

Why Choose LM15 Motorsport?

We supply genuine Denso oxygen and air fuel ratio sensors with fast shipping across Australia. Every part is carefully inspected to ensure you receive the exact component your vehicle needs for reliable performance and emissions compliance.