Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2015 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Transmission Control Module (TCM): Removal

WARNING: This page is about a different variant/trim than selected.

Disconnect the ground terminal from battery sensor. <Ref. to BATTERY , NOTE, Note.>
Move the lock lever in the arrow direction while pressing the lock button, and disconnect the connector.

Fig 1: Pressing Lock Button
Courtesy of SUBARU OF AMERICA, INC.
Remove the TCM.

Fig 2: Identifying TCM
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Remove the TCM from the bracket.
- Type A
  
  Fig 3: Identifying Bracket TCM (Type A)
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- Type B
  
  Fig 4: Identifying Bracket TCM (Type B)
  Courtesy of SUBARU OF AMERICA, INC.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.