Check the rear windshield: Look for a sticker on the rear windshield that indicates the transmission type.

This sticker is usually placed on the driver's side.

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Inspect the shifter: If your WRX has a manual transmission, the shifter will have a distinctive shape and feel, with a pronounced "H" pattern.

Look for the clutch pedal: If your WRX has a manual transmission, it will have a clutch pedal on the far left of the footwell.

Check the transmission fluid dipstick: If your WRX has an automatic transmission, the dipstick will be labeled "ATF" (Automatic Transmission Fluid).

If it has a manual transmission, it will be labeled "MTF" (Manual Transmission Fluid).

Consult the Vehicle Identification Number (VIN): Decode your WRX's VIN to find information about the transmission type.

You can use online tools or consult with a dealership or mechanic.

Examine the dashboard: If your WRX has an automatic transmission, it will likely have a "D" or "Drive" indicator on the dashboard.

If it has a manual transmission, it will have a gearshift indicator.

Check the owner's manual: If you still have the owner's manual, it should indicate the transmission type.

Inspect the transmission pan: If you're comfortable with some basic DIY, you can inspect the transmission pan to see if it's an automatic or manual transmission.

Automatic transmission pans typically have a more complex design.

Consult online resources: Websites like Edmunds, Kelley Blue Book, or Subaru's own website may have information about your WRX's transmission type.

Check the Vehicle History Report: Services like Carfax or AutoCheck may have information about your WRX's transmission type in their reports.

Visit a Subaru dealership: If you're still unsure, visit a Subaru dealership and ask them to check the vehicle's specifications.

Consult a mechanic: If you're still unsure, consult a trusted mechanic who can inspect the vehicle and provide a definitive answer.