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.
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HOMESERVICE MANUALSSUBARU2012IMPREZA WRX STI F4-2.5L DOHC TURBOREPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLRELAYS AND MODULES - BRAKES AND TRACTION CONTROLELECTRONIC BRAKE CONTROL MODULESERVICE AND REPAIRREMOVAL AND INSTALLATION
2012 Subaru Impreza WRX STI F4-2.5L DOHC Turbo
Removal and Installation
2012 Subaru Impreza WRX STI F4-2.5L DOHC TurboSECTION Removal and Installation
VDC Control Module and Hydraulic Control Unit (VDCCM& H/U)
REMOVAL
1) Disconnect the ground cable from battery.
2) Use compressed air to remove moisture and dust around the VDCCM&H/U.
NOTE:
If the terminals become dirty, it may cause improper contact.
3) Lift the lock lever and Disconnect the VDCCM&H/U connector.
CAUTION:
Do not pull on the harness when disconnecting the connector.

4) Disconnect the brake pipes from the VDCCM&H/U.
5) Wrap the brake pipe with a vinyl bag so as not to spill the brake fluid on the vehicle body.
CAUTION:
If brake fluid is spilled on the painted surface of the vehicle body, wash it off immediately with water and wipe clean.
6) Remove the nuts and remove the VDCCM&H/U.
CAUTION:
- Do not drop or bump the VDCCM&H/U.
- Do not turn the VDCCM&H/U upside down or place it sideways for storage.
- Be careful not to let foreign matter enter the VDCCM&H/U.
- Be careful that no water enters the connectors.

7) Remove the VDCCM&H/U bracket.
INSTALLATION
1) Install the VDCCM&H/U bracket.
Tightening torque:
33 Nm (3.36 kgf-m, 24.3 ft-lb)
2) Install the VDCCM&H/U with a new nut by aligning the damper groove of the VDCCM&H/U to the bracket side claw.
Tightening torque:
7.5 Nm (0.76 kgf-m, 5.5 ft-lb)

3) Connect the brake pipes to their correct VDCCM&H/U positions.
Tightening torque:
T1: 15 Nm (1.53 kgf-m, 11.1 ft-lb)
T2: 19 Nm (1.94 kgf-m, 14 ft-lb)

4) Connect the VDCCM&H/U connector.
NOTE:
- Be sure to remove all foreign matter from inside the connector before connecting.
- Make sure the VDCCM&H/U connector is securely locked.
5) Bleed air from the brake system.
6) Check the parameter to confirm that the applied models and grades of the relevant vehicle are included.
7) If the applied model and grade of the target vehicle are not included on the {Confirm on parameter} display screen, perform parameter selection and registration.
NOTE:
- When the VDCCM&H/U is replaced with a new part, be sure to perform the selection registration operation.
- For the selection and registration of parameter, the Subaru Select Monitor is required.
- When the registration has not been performed, the DTC code "Parameter selection error" is detected together with the ABS/EBD/VDC warning light illumination.
REMOVAL
1) Disconnect the ground cable from battery.
2) Use compressed air to remove moisture and dust around the VDCCM&H/U.
NOTE:
If the terminals become dirty, it may cause improper contact.
3) Lift the lock lever and Disconnect the VDCCM&H/U connector.
CAUTION:
Do not pull on the harness when disconnecting the connector.
4) Disconnect the brake pipes from the VDCCM&H/U.
5) Wrap the brake pipe with a vinyl bag so as not to spill the brake fluid on the vehicle body.
CAUTION:
If brake fluid is spilled on the painted surface of the vehicle body, wash it off immediately with water and wipe clean.
6) Remove the nuts and remove the VDCCM&H/U.
CAUTION:
- Do not drop or bump the VDCCM&H/U.
- Do not turn the VDCCM&H/U upside down or place it sideways for storage.
- Be careful not to let foreign matter enter the VDCCM&H/U.
- Be careful that no water enters the connectors.
7) Remove the VDCCM&H/U bracket.
INSTALLATION
1) Install the VDCCM&H/U bracket.
Tightening torque:
33 Nm (3.36 kgf-m, 24.3 ft-lb)
2) Install the VDCCM&H/U with a new nut by aligning the damper groove of the VDCCM&H/U to the bracket side claw.
Tightening torque:
7.5 Nm (0.76 kgf-m, 5.5 ft-lb)
3) Connect the brake pipes to their correct VDCCM&H/U positions.
Tightening torque:
T1: 15 Nm (1.53 kgf-m, 11.1 ft-lb)
T2: 19 Nm (1.94 kgf-m, 14 ft-lb)
4) Connect the VDCCM&H/U connector.
NOTE:
- Be sure to remove all foreign matter from inside the connector before connecting.
- Make sure the VDCCM&H/U connector is securely locked.
5) Bleed air from the brake system.
6) Check the parameter to confirm that the applied models and grades of the relevant vehicle are included.
7) If the applied model and grade of the target vehicle are not included on the {Confirm on parameter} display screen, perform parameter selection and registration.
NOTE:
- When the VDCCM&H/U is replaced with a new part, be sure to perform the selection registration operation.
- For the selection and registration of parameter, the Subaru Select Monitor is required.
- When the registration has not been performed, the DTC code "Parameter selection error" is detected together with the ABS/EBD/VDC warning light illumination.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.