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<h2>What is an air flow sensor?</h2>
An air flow sensor, also known as a mass airflow (MAF) sensor, is an essential component of a vehicle's engine management system. It is designed to measure the amount of air that is entering the engine to determine the appropriate amount of fuel to be injected. The sensor typically consists of a sensing element that measures the airflow, a heating element that helps to warm up the incoming air, and a signal output that sends data to the vehicle's computer.&nbsp;
The air flow sensor plays a crucial role in the engine's performance and fuel efficiency, as a malfunctioning sensor can cause the engine to receive too much or too little fuel, leading to decreased performance, increased emissions, and poor fuel economy. Therefore, it is important to ensure that the air flow sensor is working properly and to replace it if it is found to be faulty.
<h2>What happens when an air flow sensor malfunctions?</h2>
When an air flow sensor malfunctions, it can cause a number of problems with your vehicle's performance. The air flow sensor is responsible for measuring the amount of air entering the engine, which is used to determine the correct amount of fuel to be injected. If the sensor is not working properly, it can cause the engine to receive too much or too little fuel, which can lead to a variety of issues such as decreased fuel efficiency, poor engine performance, other engine component damages, etc.
<h2>How much does it cost to replace an air flow sensor?</h2>
The cost of replacing an air flow sensor can vary depending on the make and model of your vehicle and where you go to have the work done. On average, you can expect to pay anywhere from $100 to $400 for parts and labor.
If you have a basic understanding of mechanics, you may be able to replace the air flow sensor yourself, which can save you money on labor costs. However, it's important to note that some vehicles have sensors that are more difficult to access, which may require special tools and expertise to replace.
It's also worth noting that simply replacing the air flow sensor may not always fix the underlying issue. If the sensor is malfunctioning due to a larger problem with the engine or emissions system, additional repairs may be needed. It's best to have your vehicle properly diagnosed by a qualified mechanic before replacing any parts to ensure that the correct repairs are made.

Mass Air Flow Sensors/Car MAF Sensors | A-Premium

Air Flow Sensor

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Air Filter Box

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Air Intake Hose

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Air Intake Manifold Flap Adjuster

Air Intake Manifold Runner Control Sensor

Electric Vacuum Pump

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Engine Air Filter

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Intake Manifold

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Oxygen Sensor

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Pressure Sensor

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Air Filters & Intake Systems

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Timing-Control Valve Solenoid

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Engine Oil Dipstick Tube

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Fuel Cooler

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Radiator Support Assembly

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Temperature Sensor

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Turbo Hose

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Water Outlet

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Engine Cooling

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Exhaust Manifold

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Nitrogen Oxide Sensor

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Secondary Air Injection Check Valve

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Exhaust & Emission Systems

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Fuel Systems & Components

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

2003 Ford Expedition Air Flow Sensor

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