🏷️ Basic Information

Make:

Subaru

Model:

Impreza WRX

Year:

2012

Sub Model:

WRX

Chassis Code:

GJ/GV

Engine Code Common:

EJ255

👋 Introduction

Segment:

Performance Compact Sedan/Hatchback

Usp:

All-wheel drive, turbocharged performance, rally-inspired heritage.

Competitors:

Mitsubishi Lancer Evolution, Ford Focus RS, Volkswagen Golf GTI.

Drivetrain:

Symmetrical All-Wheel Drive (SAWD)

Engine Type:

Turbocharged Boxer (EJ255)

Performance Focus:

Rally-bred performance and handling.

📋 Manual Details

General Coverage:

Repair and overhaul of Subaru Impreza WRX 2012 models.

Specific Systems Covered:

Engine, transmission, drivetrain, chassis, suspension, steering, brakes, electrical systems, bodywork, HVAC, fuel system, exhaust system.

Estimated Pages:

1500+

Type:

Workshop Service Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Complete engine rebuild, internal component specifications, torque values, timing belt/chain procedures, piston and ring installation, cylinder head reconditioning.

Engine Management:

Fuel injection system, ignition system, emission control systems (catalytic converter, EGR, PCV), sensor diagnostics and replacement, ECU troubleshooting.

Transmission Drivetrain:

Manual and automatic transmission overhaul, clutch replacement, differential service, driveshaft and CV joint inspection, AWD system operation and maintenance.

Suspension Steering:

Front and rear suspension component replacement, alignment procedures, steering rack repair and replacement, power steering system service.

Brakes:

Brake system diagnostics, caliper and rotor replacement, brake line and hose service, ABS system troubleshooting and component replacement.

Electrical Systems:

Wiring diagrams, component testing, fuse and relay identification, lighting system repair, power windows, locks, and mirrors, starter and alternator service, battery maintenance.

Body Exterior Interior:

Body panel repair and replacement, door mechanism service, exterior trim, interior trim, seat adjustment and repair, glass replacement.

Heating Ventilation Air Conditioning HVAC:

HVAC system diagnostics, refrigerant handling and charging, blower motor and resistor service, heater core and A/C evaporator replacement.

Maintenance Tasks:

Scheduled maintenance intervals, oil changes, filter replacements, fluid level checks and top-offs, spark plug replacement, brake pad replacement.

Troubleshooting Guides:

Diagnostic charts for common symptoms, fault code explanations, step-by-step troubleshooting procedures for various systems.

Repair And Rebuild:

Detailed instructions for component removal, disassembly, inspection, repair, reassembly, and installation.

Technical Specifications:

Torque specifications for all fasteners, critical clearances, fluid capacities, electrical component resistance and voltage specifications.

Depth Level:

Comprehensive, covering basic maintenance to complete engine and transmission rebuilds. Assumes technician familiarity with general automotive practices.

📊 Manual Specifications

Format:

PDF

Searchability:

Text-searchable

Quality:

High-resolution scans of original factory documentation.

Binding:

N/A (Digital PDF)

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Type:

2.5L Turbocharged Boxer-4 (EJ255)

Displacement:

2457 cc (2.5 Liters)

Horsepower:

305 hp @ 6000 rpm

Torque:

290 lb-ft @ 2500 rpm

Fuel Delivery:

Sequential multi-point fuel injection (MPI) with Denso fuel injectors.

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

ECU Type:

Denso Engine Control Unit (ECU)

🔧 Transmission

Transmission Type:

6-Speed Manual Transmission

Transmission Type:

Not applicable for WRX model in this year (manual only).

Drivetrain Type:

Symmetrical All-Wheel Drive (SAWD)

Center Differential:

Mechanical center differential with viscous coupling AWD system.

📐 Dimensions

Length:

4415 mm (173.8 in)

Width:

1795 mm (70.7 in)

Height:

1470 mm (57.9 in)

Wheelbase:

2650 mm (104.3 in)

Curb Weight:

1480 kg (3263 lbs)

Gross Vehicle Weight Rating Gvwr:

1910 kg (4211 lbs)

🛡️ Safety Features

NHTSA Front Crash Rating:

5-Star

NHTSA Side Crash Rating:

5-Star

NHTSA Rollover Rating:

4-Star

Traction Control:

Standard

Electronic Stability Control Esc:

Standard (Vehicle Dynamics Control - VDC)

Anti Lock Braking System ABS:

Standard

Brake Assist Ba:

Standard

Airbags:

Driver and front passenger airbags, front side-impact airbags, front and rear side-curtain airbags.

Seatbelts:

3-point front seatbelts with pretensioners and load limiters, 3-point rear seatbelts.

Child Seat Anchors:

LATCH (Lower Anchors and Tethers for CHildren) system.

💡 Technology Features

Head Unit:

Standard AM/FM/CD/MP3 audio system with available navigation system.

Speaker System:

Typically 4 or 6 speaker system, with optional Rockford Fosgate premium audio.

Display:

Multi-information display in the instrument cluster.

Cruise Control:

Standard

Keyless Entry:

Standard

Auxiliary Audio Input:

Standard

Bluetooth:

Available on higher trim levels or as an option.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles or 3 months (severe duty), 7,500 miles or 7.5 months (normal duty). Refer to manual for specific driving conditions.

Air Filter Replacement:

Every 15,000 miles or 12 months.

Cabin Air Filter Replacement:

Every 15,000 miles or 12 months.

Spark Plug Replacement:

Every 30,000 miles ( iridium type).

Timing Belt Replacement:

N/A (Timing chain driven engine).

Engine Oil Type:

SAE 5W-30, API SN or ILSAC GF-5 certified.

Engine Oil Capacity:

4.8 US quarts (4.5 Liters) with filter.

Coolant Type:

Subaru Super Coolant (Blue) or equivalent silicate-free, long-life coolant.

Transmission Fluid Type:

Subaru Extra MT Fluid (for 6MT) or Subaru ATF-HP (for 5AT, if applicable to specific WRX trims outside North America).

Differential Fluid Type:

SAE 75W-90, API GL-5 gear oil.

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid.

Engine Oil Consumption:

Some EJ255 engines are known to consume oil, especially under hard driving. Regular checks are recommended.

Clutch Wear:

The stock clutch can be susceptible to wear with aggressive driving or frequent clutch dumps.

Suspension Components:

Bushings and ball joints can wear over time, especially with spirited driving.

Turbocharger Maintenance:

Proper warm-up and cool-down procedures are critical for turbocharger longevity.

📚 Vehicle History

Rally Connection:

Subaru's long and successful history in the World Rally Championship (WRC).

Generation:

Third generation (GE/GH/GR/GV) Impreza, specifically the performance-oriented WRX variant.

Design Changes:

The 2012 model received a significant facelift, including a revised front grille and bumper, new fog light surrounds, and updated interior trim. The hatchback (GR) and sedan (GV) body styles were available.

Production Years For This Generation:

2007-2014 (global, with facelifts)

🏆 Awards & Recognition

Car And Driver 10Best:

While not a specific 2012 award, the Impreza WRX lineage has consistently been recognized for performance by automotive publications.

Safety Ratings:

Achieved top ratings from NHTSA and IIHS in its class for the era.

Emissions Certification:

Meets EPA and CARB emissions standards for its model year.