HowTune

Clean The Maf Sensor on a 2004-2007 Subaru Impreza WRX

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Quick and easy cleaning instructions for the Mass Air Flow sensor on your 2004-2007 Subaru Impreza WRX and STI cars.

Regular cleaning of the Mass Air Flow sensor should be considered regular maintenance. This sensor can get dirty, and dramatically effect how your car runs and idles. I'd suggest cleaning the sensor with every air filter change.

Many consider it advisable to replace the MAF every 100k miles.

Preparation

1

Locate the Mass Air Flow sensor

2

Remove the 2 Philips head screws.

3

Disconnect the wire harness.

Squeeze the clip and wiggle the connector off the sensor.

4

Remove the MAF sensor from the intake tubing.

Image 8177 from Clean the MAF Sensor on a 2004-2007 Subaru Impreza WRX
5

Clean the sensor with MAF sensor cleaning spray.

Be careful not to touch or damage the metering wires inside the unit.

It may not be useful, but I always clean the temperature sensor at the same time.

Image 8178 from Clean the MAF Sensor on a 2004-2007 Subaru Impreza WRX
6

Clean the sensor and intake tubing where the meet. There's always a build up of sand and grime, and we don't want that to interfere with the seal.

7

Install the sensor.

8

Install the 2 screws

9

Re-connect the wire harness.

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