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

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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.

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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.

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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
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Related product resources and downloads

How to test a newly fitted Lambda sensor

How to test a newly fitted Lambda sensor

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Sensors Vehicle Electronics & Engine Management How to Technicians

Resource Highlights

If you’ve replaced an O2 sensor, also known as a Lambda sensor, then you need to check it’s working correctly before allowing the vehicle to leave your workshop.  

In this Masters of Motion video, our Delphi expert shows you how to test if it is fully working. Discover the following: 

• Why you need to test a new O2 sensor 
• How to perform a drive cycle 
• How to clear fault codes 

What does an O2 sensor do? 

It makes sure a vehicle’s engine is correctly burning fuel by measuring the amount of oxygen in the exhaust fumes.  

What equipment will I need? 

To make sure that the new lambda sensor is working correctly, you will need a Delphi BlueTech DS480 VCI and Delphi Workshop Tablet.

Why do I need to test the sensor if it’s new? 

This is because as soon as you delete the fault codes on the tablet, the readiness tests need to be redone to ensure it is working correctly.  

Do I need to do a test drive of the vehicle? 

Yes, in order to redo the readiness test, you will need to take the car out on the road. 

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