2012 Subaru WRX Service and Repair Manual

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Factory-Grade Data

2012 Subaru WRX service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • STI Hatchback 4-Door
  • Base Sedan 4-Door
  • Base Hatchback 4-Door
  • STI Sedan 4-Door

Engines covered

  • 2.5L 2458CC H4 GAS DOHC Turbocharged

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2012 Subaru WRX Recalls & Complaints

NHTSA #19V29700011/04/2019Component: ELECTRICAL SYSTEM:IGNITION:SWITCH

Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester vehicles, 2008-2011 Impreza vehicles, 2008-2014 WRX vehicles, 2005-2014 Legacy vehicles, 2005-2014 Outback vehicles and 2006-20

Consequence

The engine turning off unexpectedly can increase the risk of a crash. If a crash occurs under this

Remedy

Subaru will notify owners, and dealers will inspect the ignition switch, replacing the ignition swit

NHTSA #17V01400010/01/2017Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Subaru of America, Inc. (Subaru) is recalling certain 2005-2006 Subaru Baja, 2006-2011 Impreza (including WRX and STI models), 2006-2012 Tribeca, 2009-2012 Forester, Legacy, Outback, and 2012 WRX vehi

Consequence

An inflator rupture may result in metal fragments striking the vehicle occupants resulting in seriou

Remedy

Subaru will notify owners, and dealers will replace the front passenger air bag inflator, free of ch

NHTSA #20V00200002/01/2020Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (including STI), 2003-2014 Legacy and Outback, and 2006 Saab 9-2X vehicles or

Consequence

An inflator explosion may result in sharp metal fragments striking the driver or other occupants res

Remedy

Subaru will notify their owners. General Motors will notify Saab owners. Dealers will replace the

NHTSA #20V00100002/01/2020Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (STI included), 2003-2014 Legacy and Outback, and 2005-2006 Saab 9-2X vehicle

Consequence

An inflator explosion may result in sharp metal fragments striking the driver or other occupants res

Remedy

Subaru will notify their owners. General Motors will notify Saab owners. Dealers will replace the

NHTSA #20V00300002/01/2020Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Subaru of America, Inc. (Subaru) is recalling certain 2009-2013 Forester, 2003-2006 Baja, 2004-2011 Impreza, 2004-2014 WRX (including STI), 2003-2014 Legacy and Outback, and 2005-2006 Saab 9-2X vehicl

Consequence

An inflator explosion may result in sharp metal fragments striking the driver or other occupants res

Remedy

Subaru will notify their owners. General Motors will notify Saab owners. Dealers will replace the

TSB #11032040

This bulletin announces the service manual correction regarding clutch master cylinder reservoir service procedures.

TSB #11032039

This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.

TSB #11032035

This Bulletin provides the diagnostic procedures to be followed when addressing customer concerns of steering wheel/vehicle body vibration when driving at highway speeds when tire/wheel balance is suspected.

TSB #11032034

This Service Information Bulletin was developed to provide interim guidance for vehicles exhibiting DTC B2A20.

TSB #11030567

This bulletin contains information to help when attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur preventing the process from completing successfully

TSB #11030561

This announcement provides information on the use of aftermarket services or tools for programming immobilizer keys/fobs.

TSB #11030560

This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance concerns possibly resulting from an undetected A/C refrigerant leak.

TSB #11030557

This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.

Showing the 8 most recent of 198 technical service bulletins on file with NHTSA.

20180313Component: ENGINE

I HAD CHECKED MY OIL ABOUT A WEEK PRIOR TO THIS HAPPENING. I WAS OUT ON THE INTERSTATE ON MY WAY TO GET MY OIL CHANGED WHEN I HEARD A LOUD KNOCKING AND LOST ALL POWER STEERING AND POWER BRAKES. ALMOST

20180313Component: POWER TRAIN

I HAD CHECKED MY OIL ABOUT A WEEK PRIOR TO THIS HAPPENING. I WAS OUT ON THE INTERSTATE ON MY WAY TO GET MY OIL CHANGED WHEN I HEARD A LOUD KNOCKING AND LOST ALL POWER STEERING AND POWER BRAKES. ALMOST

20180313Component: STEERING

I HAD CHECKED MY OIL ABOUT A WEEK PRIOR TO THIS HAPPENING. I WAS OUT ON THE INTERSTATE ON MY WAY TO GET MY OIL CHANGED WHEN I HEARD A LOUD KNOCKING AND LOST ALL POWER STEERING AND POWER BRAKES. ALMOST

20160831Component: VEHICLE SPEED CONTROL

DURING NORMAL DRIVING ACTIVITIES, THE ACCELERATOR PEDAL WILL STOP FUNCTIONING. AT THIS TIME, THE CHECK ENGINE LIGHT ILLUMINATES AND THE ENGINE IDLE IS HELD STEADY AT APPROXIMATELY 1500RPM. THE CAR CAN

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