Spectra Premium MA291 mass air flow sensor for the 2003-2004 Ford Expedition V8 4.6L, the 2003-2014 Expedition V8 5.4L and other vehicles senses the air entering the engine intake.
A worn mass air flow sensor can show up as a rough idle, hesitation when you accelerate or a check engine light. Before you replace the sensor, rule out a loose or cracked intake duct, a clogged air filter and a damaged connector, since each of them can also upset the airflow reading.
It fits the 2003-2004 Ford Expedition V8 4.6L, the 2003-2014 Expedition V8 5.4L and the 2003-2004 Lincoln Navigator V8 5.4L. This listing is one sensor, and a single sensor is all any of them takes.
Is Spectra Premium MA291 the right 2004 Ford Expedition mass air flow sensor for both the V8 4.6L and the V8 5.4L?
Yes. Spectra Premium MA291 is listed for the 2003-2004 Ford Expedition V8 4.6L and the 2003-2014 Expedition V8 5.4L, so a 2004 model takes it with either engine.
Does the 2003-2004 Lincoln Navigator V8 5.4L take this mass air flow sensor?
Yes. Spectra Premium MA291 is listed for the 2003-2004 Lincoln Navigator V8 5.4L, and that vehicle takes one sensor.
Is the Spectra Premium mass air flow sensor sold as a single unit?
Yes. Each listing is one sensor, and the vehicles it fits take one. A sensor is replaced when it fails, so there is no need to buy it in a pair.
Which symptoms can a failing MA291 mass air flow sensor cause?
A failing mass air flow sensor can show up as stalling, poor fuel economy or a hard start. A shop can read the codes and test the sensor to confirm it.
Is it okay to keep driving with a failing mass air flow sensor?
Have it checked promptly. A wrong airflow reading can change how the engine runs, and a shop can scan for codes and test the sensor and intake.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
