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Subaru Impreza WRX 2012 Workshop Service Manual for Repair
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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX Year: 2012 Codes Chassis Code: GJ/GP Engine Code: EJ255 (2.5L Turbocharged Boxer) 👋 Introduction Market Position Segment: Compact performance sedan/hatchback Usp:...
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🏷️ Basic Information
Identification
Make:
Subaru
Model:
Impreza WRX
Year:
2012
Codes
Chassis Code:
GJ/GP
Engine Code:
EJ255 (2.5L Turbocharged Boxer)
👋 Introduction
Market Position
Segment:
Compact performance sedan/hatchback
Usp:
Iconic turbocharged Boxer engine, Symmetrical All-Wheel Drive, rally-bred performance heritage.
Competitive Analysis
Key Competitors:
Mitsubishi Lancer Evolution, Volkswagen GTI, Ford Focus ST, Mazdaspeed3.
Key Features
Performance Focus:
Emphasizes driver engagement and all-weather capability.
AWD System:
Subaru's renowned Symmetrical All-Wheel Drive provides superior traction and handling.
📋 Manual Details
Coverage Areas
Primary Coverage:
North America
Secondary Coverage:
Global markets with potential regional variations
Page Count
Total Pages:
3352
Manual Type
Type:
Workshop Service Manual / Repair Manual
Language
Language:
English
Format
Format:
PDF
📖 Manual Coverage
Systems Covered
Engine Mechanical:
Detailed disassembly, assembly, inspection, and repair of all engine components (cylinder head, block, pistons, crankshaft, camshafts, timing system, lubrication, cooling).
Engine Performance:
Turbocharger system, intercooler, intake manifold, exhaust system, fuel injection system, ignition system, emissions control system.
Transmission Manual:
TR6060 (6-speed manual): Disassembly, assembly, clutch system, shift linkage, maintenance procedures.
Transmission Automatic:
Not applicable for WRX models, this manual focuses on the manual transmission.
Drivetrain:
Symmetrical All-Wheel Drive (AWD) system, center differential, rear differential, front axles, rear axles, driveshaft.
Suspension:
Front struts, rear shock absorbers, springs, control arms, stabilizer bars, bushings, wheel bearings, alignment specifications.
Brakes:
Front and rear disc brakes (including Brembo calipers on some trims), ABS system, EBD, brake lines, master cylinder, hydraulic troubleshooting.
Steering:
Power steering system (hydraulic), steering rack, tie rods, steering column, wheel alignment.
Electrical System:
Battery, alternator, starter, wiring diagrams, fuses, relays, lighting system, power windows, power locks, horn, ignition system.
Body And Interior:
Body panels, doors, hood, trunk, interior trim, seats, dashboard, HVAC system, airbags.
Diagnostics:
OBD-II diagnostic trouble codes (DTCs), scan tool procedures, common fault symptoms and their causes, troubleshooting flowcharts.
Procedures Included
Scheduled Maintenance:
Detailed procedures for oil changes, filter replacements, fluid checks and replacements, spark plug replacement, belt inspection and replacement.
Repair Procedures:
Step-by-step guides for virtually all mechanical and electrical repairs, from basic component replacement to complete system overhauls.
Troubleshooting:
Systematic diagnostic approaches for identifying and resolving malfunctions across all vehicle systems.
Component Replacement:
Instructions for replacing parts such as alternators, starters, water pumps, fuel pumps, sensors, actuators, and more.
Specifications And Tolerances:
Crucial torque values, clearances, and measurements for proper assembly and repair.
Wiring Diagrams:
Comprehensive electrical schematics for all vehicle systems, aiding in diagnosis and repair of electrical faults.
Technical Depth
Depth:
Comprehensive (from basic maintenance to complete engine/transmission rebuilds and advanced diagnostics).
📊 Manual Specifications
File Format
Format:
PDF
Searchability:
Searchable text within PDF
Print Quality
Quality:
High resolution, suitable for printing
Binding Type
Binding:
N/A (Digital PDF)
Paper Type
Paper:
N/A (Digital PDF)
⚙️ Engine Specifications
Primary Engine
Engine Type:
EJ255 turbocharged Boxer engine
Displacement:
2.5 Liters (2457 cc)
Configuration:
Horizontally Opposed (Boxer) 4-cylinder
Aspiration:
Turbocharged with intercooler
Performance
Horsepower Hp:
Approx. 305 hp @ 6000 rpm (Varies slightly by region and specific trim)
Torque Lb Ft:
Approx. 290 lb-ft @ 4000 rpm (Varies slightly by region and specific trim)
Fuel System
Fuel Delivery:
Electronic Fuel Injection (EFI), sequential port injection
Fuel Type:
Premium Unleaded Gasoline (91 octane or higher recommended)
Cooling System
Coolant Type:
Subaru Super Coolant (Blue) or equivalent HOAT coolant
Lubrication System
Oil Type:
SAE 5W-30 Synthetic (refer to manual for specific API/ILSAC ratings)
Oil Capacity Quarts:
5.8 US quarts (with filter change)
🔧 Transmission
Standard
Transmission Type:
6-speed Manual Transmission (TR6060)
Optional
Transmission Type:
Not available for 2012 WRX; a 5-speed auto was available on non-WRX Imprezas.
Features
Clutch Type:
Hydraulically operated, single dry plate
Transmission Fluid Type:
API GL-5, SAE 75W-90 Synthetic Gear Oil (Subaru specification recommended)
📐 Dimensions
Exterior
Length In:
173.8
Width In:
70.7
Height In:
57.7
Wheelbase In:
104.1
Ground Clearance In:
5.7
Weights
Curb Weight Lbs:
3252
Gross Vehicle Weight Rating Lbs:
4365
Cargo
Trunk Volume Cu Ft:
11.3 (Sedan)
Wheels And Tires
Standard Wheel Size:
17 x 8.0 inches
Optional Wheel Size:
18 x 8.5 inches (often on higher trims)
Standard Tire Size:
225/45R17
Optional Tire Size:
245/40R18
Bolt Pattern:
5 x 100 mm
Lug Nut Size:
M12 x 1.25
🛡️ Safety Features
Ratings
NHTSA Front Impact:
5-Star (Driver), 4-Star (Passenger)
NHTSA Side Impact:
5-Star (Driver), 5-Star (Passenger)
IIHS Front Crash Rating:
Good
IIHS Side Crash Rating:
Good
IIHS Roof Strength Rating:
Good
Active Features
Traction Control:
Standard
Electronic Stability Control:
Standard (Vehicle Dynamics Control - VDC)
Anti Lock Braking System:
Standard (ABS)
Electronic Brakeforce Distribution:
Standard (EBD)
Passive Features
Airbags:
Front, Side-Curtain, and Front Seat-Mounted Airbags
Seatbelts:
3-point with pretensioners and load limiters
Child Seat Anchors:
LATCH system
💡 Technology Features
Infotainment
Audio System:
Standard AM/FM/CD/MP3 stereo with auxiliary input. Optional upgraded audio system (e.g., Rockford Fosgate).
Navigation:
Optional factory-installed GPS navigation system.
Bluetooth:
Optional Bluetooth hands-free connectivity.
Driver Assistance
Cruise Control:
Standard
Keyless Entry:
Standard
All Wheel Drive System Control:
Advanced computer control integrated with VDC for optimal traction management.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 3,750 miles or 6 months for severe driving, 7,500 miles or 12 months for normal driving (refer to manual for specifics).
Air Filter Replacement:
Inspect every 15,000 miles, replace as needed. Replace every 30,000 miles for severe conditions.
Spark Plug Replacement:
Iridium type: 60,000 miles. Inspect at 30,000 miles.
Transmission Fluid Change:
Every 30,000-60,000 miles depending on driving conditions (refer to manual).
Brake Fluid Change:
Every 30,000 miles or 3 years.
Coolant Change:
Initial change at 30,000 miles, then every 30,000 miles thereafter.
Fluid Specifications
Power Steering Fluid:
Subaru Genuine Power Steering Fluid or equivalent Dexron III/Mercon ATF (verify in manual).
Brake Fluid:
DOT 3 or DOT 4 brake fluid (verify in manual).
Clutch Fluid:
DOT 3 or DOT 4 brake fluid (shared with brake system).
Known Issues
Piston Ring Wear:
Some EJ25 engines can experience oil consumption issues due to piston ring wear, particularly with aggressive tuning or insufficient maintenance.
Clutch Wear:
Heavy clutch use or abuse can lead to premature wear, especially in spirited driving scenarios.
Catalytic Converter Issues:
Can become clogged over time, affecting performance and emissions. Regular checks and proper fuel usage are important.
Suspension Component Wear:
Bushings and control arms can wear over time, leading to alignment issues and handling degradation. Regular inspection is recommended.
📚 Vehicle History
Brand Heritage
Rally Roots:
Subaru's extensive World Rally Championship (WRC) success heavily influenced the WRX's development and reputation.
Model Evolution
Impreza Lineage:
The WRX is a performance variant of the Subaru Impreza compact car, first introduced in 1992.
Generation Details:
The 2012 model year is part of the third generation (GE/GH/GR/GV) of the Impreza, though it marked a subtle styling refresh and powertrain update for the WRX.
Wrx Distinction:
The WRX was distinguished from standard Imprezas by its more powerful turbocharged engine, sport-tuned suspension, performance brakes, and aerodynamic enhancements.
Production
Manufacturing Location:
Gunma Manufacturing Plant, Ota, Gunma, Japan
🏆 Awards & Recognition
Recognitions
Sport Compact Car Of The Year:
The Subaru WRX has historically been a strong contender and winner in various "Sport Compact" awards from automotive publications.
Car And Driver 10Best:
While not always a direct entrant, the Impreza platform has been recognized, and the WRX's performance merits comparison with 10Best vehicles.
Rally Heritage Recognition:
Consistently recognized for its motorsport lineage and affordable performance.