What does an oxygen sensor do for my vehicle?

An oxygen sensor monitors the amount of oxygen in your exhaust gases and sends this data to your vehicle's computer. This information is used to adjust the air-fuel mixture for optimal engine performance, fuel efficiency, and emissions control.

Why is the ceramic element important in this NGK sensor?

The advanced ceramic element in this NGK sensor is protected by a special overcoat. This design helps resist contaminants and prevents poisoning, which can degrade sensor performance over time and lead to inaccurate readings.

Does this oxygen sensor come with everything needed for installation?

This NGK oxygen sensor is sold individually. While it's designed as a direct fit replacement, it's recommended to check your vehicle's service manual or consult a mechanic to see if any additional hardware or sealants are required for installation.

NGK Oxygen Sensor 21549 - Fits Cadillac, Chevrolet, GMC, Hum

Name: NGK Chevrolet Avalanche 2500 2006-2003 Direct Fit Oxygen Sensor
Brand: NGK
Price: 73.95 USD
Availability: InStock

NGK Chevrolet Avalanche 2500 2006-2003 Direct Fit Oxygen Sensor

$73.95

In Stock

NGK Oxygen Sensor 21549. Helps maintain optimal engine performance and fuel efficiency for a wide range of vehicles.

Key Features

Fits a wide range of Cadillac, Chevrolet, GMC, and Hummer vehicles.
Advanced ceramic sensor element with a 3-stage contaminant-resistant plasma jet.
Protects against element poisoning from exhaust gases.
Helps control the air-fuel ratio for optimal engine performance.
Maximizes fuel efficiency and reduces harmful emissions.
Alerts OBDII systems to potential fuel delivery or catalytic converter problems.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

This NGK oxygen sensor, part number 21549, is designed to help your vehicle's engine run as efficiently as possible. As a key part of your car's diagnostic system, oxygen sensors constantly monitor the air-fuel mixture and send that information back to the engine control unit (ECU). This feedback is crucial for maximizing fuel economy, reducing harmful emissions, and ensuring your engine is performing at its best. This sensor fits a wide variety of vehicles, including models like the Chevrolet Avalanche 2500, GMC Sierra 1500, and Cadillac Escalade.

NTK, the manufacturer of NGK sensors, is a major supplier of original equipment oxygen sensors, meaning they work closely with automakers from the initial design phase through production. This sensor features an advanced ceramic element with a special overcoat designed to resist contaminants and protect against poisoning, which can happen over time with exposure to exhaust gases. This construction helps ensure consistent performance and longevity, keeping your engine's air-fuel ratio in check and alerting you to potential issues with fuel delivery or the catalytic converter.