Mass Air Flow Sensors

More commonly known as MAF sensor or air meter, the mass airflow sensor has one very important job; measuring the amount of air entering the engine for an optimal air-fuel ratio. Without this information, the ECU will not be able to accurately control fuel injection, resulting in an engine that will either idle roughly or worst case, not at all. But don’t worry! We’ve been producing OE MAF sensors since the 1970s. Today, we hold more than 30 patents in MAF sensing technology and signal processing, and have delivered more than 50 million OE MAF sensors for over 500 customer applications. So why not try us for your aftermarket needs too.

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Innovative OE design

We build our OE expertise into every MAF sensor we make. Featuring a proprietary temperature compensation design, they offer outstanding performance over a wide range of ambient temperatures. And are fast to respond to changing engine conditions – typically less than 15 milliseconds to respond to 90 percent of a flow change. Innovative, dual-heated elements on specific references also help to ensure optimal performance, fuel efficiency, and reduced emissions

OE engineered and tested

By testing and calibrating to OE specifications, our MAF sensors provide the same accurate readings and airflow output as the OE. Each sensor is tested on state-of-the-art sonic nozzle-testing equipment capturing over 6,000 data points per flow, for optimal calibration accuracy. They’re also flow tested to match the OE for signal stability (noise), temperature compensation (the ability of the MAF sensor to measure airflow accurately from -30°C to 70°C) and electromagnetic compatibility.

Never remanufactured MAF sensor

Some things are better new. That’s why every sensor we make – whether with or without the housing—is built with all-new components and never remanufactured. Remanufactured MAFs are simply cleaned and tested, so any contamination on the sensor may not be eliminated, resulting in inaccurate readings to the ECU.

Greener probe-only technology

It’s often the electronics on the sensor probe that fail, meaning it’s not always necessary to replace the complete part. So we developed a probe-only solution, in addition to a full range of complete units. By eliminating the plastic housing, this provides a greener, more cost-effective and faster repair option.

The complete package

With Delphi you get access to the complete package: the range, advanced DS diagnostics including the ability to look at live data, both at idle and max RPM, to determine if the MAF sensor is reporting the correct data, expert training and support and vehicle technical information including wiring diagrams, component locations and guided diagnostic procedures.

The Delphi Difference

100 years of OE experience, supplier to the world’s top automakers
OE heritage and knowledge built into every aftermarket part
Comprehensive portfolio for a wide range of vehicles and model years
Streamlined SKUs for easy inventory management
Support through tools, tips and training

Related product resources and downloads

1 min read

How to test your crankshaft position sensor

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Sensors Vehicle Electronics & Engine Management How to Technicians 1 min read

Resource Highlights

A crank sensor plays a vital role in measuring the position and the speed of the crankshaft, and essentially, the engine.

A misfire, trouble starting the car, or a rougher sounding idling engine could be the first signs that there’s an issue with the sensor.

Pick up some tips on the proper procedure of how to test a crank position sensor with this video from the experts at Delphi. We’ve chosen the Kia Rio to demonstrate:

• The two main types of crank sensors

• How to test crank position sensor with a multimeter

• All the equipment needed to carry out a successful test

When should I test a crank position sensor?

There are numerous things to indicate that you might have an issue with your crank sensor. Firstly, the warning engine light might be illuminated on your dashboard. Has your engine been stalling? When you’re sat idling, does the engine sound rough? Is the engine not delivering the power you’re used to, and is your fuel efficiency not as good as it once was? Does your engine crank but not start? If you experience any of these, it’s worth testing.

Are there different crank sensors?

There are two main types of sensors – an inductive sensor, and a Hall effect sensor. The general rule is that an inductive sensor has two wires, and a Hall effect has three. However, some two-pin inductive sensors have an extra wire for shielding so please check carefully before carrying out any test.