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Toyota RAV4 MAF Sensor Replacement Guide
How to change the mass air flow sensor in a 2019 to 2023 Toyota RAV4 with the A25A-FKS 2.5L I4 engine.

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2019 RAV4 2.5L I4
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Engine Air Filter Housing
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MAF Sensor Location
This automotive maintenance tutorial was specifically written to assist owners of the fifth generation (2019, 2020, 2021, 2022 and the updated 2023 model year) Toyota RAV4 SUV in cleaning or changing a failing or faulty mass air flow (MAF) sensor for the A25A-FKS 2.5 liter inline four cylinder engine.

Owners of other Toyota and Lexus vehicles such as the Camry, Corolla, Highlander, Prius, Avalon, C-HR, GR86, Venza, Sienna, Sequoia, 4Runner, IS 250, IS 300, IS 350, ES 350, GS 350 and GX 460 may also find these DIY instructions to be helpful.

The original OEM mass air flow sensor part number is Toyota 22204-75040.

If you would like to try cleaning your sensor before purchasing a new one, use some CRC Mass Air Flow Sensor Cleaner spray.

The only tool needed to remove and replace the sensor is a Phillips head screwdriver.

Some of the symptoms of a faulty MAF sensor include rough starting, stalling, hesitation, jerking, rough idling and a decrease in fuel efficiency (lower MPG).

If you have an OBDII or OBD2 Scan Tool, some of the DTC (diagnostic trouble codes) that you might see include P0101, P0100, P0102 or P0103.



 

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Push In Release Tab
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Disconnect Power Plug
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Loosen Counterclockwise
The first two steps are to open the hood and then move to the right (driver) side of the engine bay.

The MAF sensor is attached to the black plastic air intake hose near the engine air filter box and close to the 12V automotive battery.

Push in the release tab on the electrical connector before sliding it straight out of its socket.

Remove the two screws that hold the sensor in place by turning them in the counterclockwise direction with a Phillips head screwdriver.

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Remove Second Screw
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2 Phillips Head Screws
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Rotate Back & Forth
Set the two Phillips head screws aside in a safe place.

Gently rotate the old sensor back and forth a few times to loosen it.

Then pull the old MAF sensor straight out of the air intake tube.

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Pull Out Old Sensor
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Inspect Old Sensor
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Spray Wire With Cleaner

Inspect the old sensor for any signs of damage or to see if it is covered in oil or soot.

To clean the old sensor, spray it with some CRC Mass Air Flow Sensor Cleaner.

Avoid spraying the electrical contacts.

Be sure to allow the sensor to fully air dry before reinstalling it.

Do NOT shake the sensor or use compressed air to dry it to prevent from damaging the delicate sensor wire.

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OEM Part Number
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Part # 22204-75040
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Line Up New Sensor

The compatible replacement OEM sensor part number is Toyota 22204-75040.

Install the new sensor into the port in the air intake hose.

Line up the screw holes in the sensor with their corresponding holes in the air intake hose.

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Spin In Two Screws
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Replace Second Screw
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Tighten Clockwise
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Tighten Second Screw
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Push On Power Plug
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Sensor Change Done
Replace the two screws by turning them in the clockwise direction with the Phillips head screwdriver until they are snug.

Try to avoid over tightening the screws to prevent from cracking the plastic MAF sensor housing.

Push the electrical connector straight on to the new sensor until it clicks securely into place.

Start the engine and check to see if the SES (service engine soon) or the CEL (check engine light) has turned off.

If you have an OBDII Scanner, reset any MAF sensor related error codes.

Be sure to record the sensor change in your vehicle's service records.

For more, please check out all of my 2019-2023 Toyota RAV4 DIY Repair & Maintenance Guides.
 

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