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Subaru Impreza G3 WRX Sti Complete Workshop Sercvice Repair Manual 2012 2013 2014
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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Generation: G3 Model Years Covered: 2012, 2013, 2014 Codes Chassis Code: GR/GV (Hatchback/Sedan) 👋 Introduction Market Position Vehicle Segment: Compact...
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🏷️ Basic Information
Identification
Make:
Subaru
Model:
Impreza WRX STI
Generation:
G3
Model Years Covered:
2012, 2013, 2014
Codes
Chassis Code:
GR/GV (Hatchback/Sedan)
👋 Introduction
Market Position
Vehicle Segment:
Compact Sports Sedan/Hatchback
Performance Focus:
High-performance variant of the Subaru Impreza, rally-bred heritage
Competitive Analysis
Key Competitors:
Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus RS
Key Features
Performance Drivetrain:
Symmetrical AWD, turbocharged Boxer engine, performance suspension
Rally Heritage:
Direct lineage from Subaru's World Rally Championship success
Driver Engagement:
Focus on handling, steering feel, and driver feedback
📋 Manual Details
Coverage Areas
Manual Type:
Complete Workshop Service Repair Manual
Language:
English
Format:
Downloadable Digital File (likely PDF)
Page Count
Estimated Page Count:
Over 3000 pages (typical for complete workshop manuals)
📖 Manual Coverage
Systems Covered
Engine:
2.5L Turbocharged EJ257 (and potential variations)
Transmission:
6-speed Manual Transmission (TY757VB1AA, etc.)
Drivetrain:
Symmetrical All-Wheel Drive (AWD) System
Suspension:
Front: MacPherson Struts, Rear: Double Wishbone
Brakes:
Front: Brembo 4-piston calipers, Rear: Brembo 2-piston calipers
Steering:
Hydraulic Power Steering
Electrical:
Full Electrical Schematics, ECU, Sensors, Lighting, Audio
Body And Chassis:
Body panels, doors, interior trim, structural components
HVAC:
Heating, Ventilation, and Air Conditioning System
Fuel System:
Fuel pump, injectors, lines, tank
Cooling System:
Radiator, coolant, water pump, thermostat
Procedures Included
Routine Maintenance:
Oil changes, filter replacements, fluid checks, tire rotation
Engine Overhaul:
Engine assembly/disassembly, piston/ring replacement, valve service
Transmission Repair:
Clutch replacement, gearbox disassembly/reassembly, differential service
Brake System Repair:
Brake pad/rotor replacement, caliper service, fluid bleeding
Suspension And Steering Repair:
Component replacement (struts, bushings, tie rods), alignment procedures
Electrical Diagnostics:
Troubleshooting wiring issues, sensor testing, component diagnosis
Bodywork And Collision Repair:
Panel replacement, structural repair guidance
Troubleshooting:
Diagnostic flowcharts, common problems and solutions
Specifications And Tolerances:
Detailed torque values, clearances, fluid capacities
Diagnostic Trouble Codes DTCs:
Explanation of codes and diagnostic paths
Technical Depth
Depth Of Coverage:
Comprehensive, covering from basic maintenance to full engine/transmission rebuilds
Diagnostic Capability:
Advanced diagnostics for engine, transmission, ABS, airbags, and more
Rebuild Procedures:
Detailed instructions for rebuilding major components
Special Tools Required:
Identification of necessary specialized tools for specific repairs
📊 Manual Specifications
File Format
File Type:
Digital (PDF)
Searchability:
Likely text-searchable PDF for easy information retrieval
Print Quality
Printability:
Designed for printing individual pages or sections as needed
Binding Type
Binding Type:
N/A (Digital Format)
Paper Type
Paper Type:
N/A (Digital Format)
⚙️ Engine Specifications
Primary Engine
Engine Code:
EJ257
Engine Type:
2.5L Flat-4 (Boxer), Turbocharged, Intercooled
Bore X Stroke:
99.5 mm x 79.0 mm
Compression Ratio:
8.2:1
Performance
Horsepower:
305 hp @ 6000 rpm (approx.)
Torque:
290 lb-ft @ 4000 rpm (approx.)
Fuel System
Fuel Delivery:
Multi-point Fuel Injection (MPI)
Fuel Type:
Premium Unleaded Gasoline (91 octane or higher recommended)
Turbocharger:
IHI VF48 or similar twin-scroll turbocharger
🔧 Transmission
Standard
Transmission Type:
6-Speed Manual
Transmission Model:
TY757VB1AA (example)
Optional
Optional Transmission:
N/A (STI models are exclusively manual)
Features
Center Differential:
Driver-controlled center differential (DCCD)
Rear Differential:
Helical Limited Slip Differential (LSD)
Transmission Fluid Spec:
Subaru Extra-S Gear Oil (GL-5) or equivalent, 75W-90 viscosity recommended
📐 Dimensions
Exterior
Length:
4415 mm (Sedan) / 4414 mm (Hatchback)
Width:
1795 mm
Height:
1470 mm (Sedan) / 1475 mm (Hatchback)
Wheelbase:
2650 mm
Ground Clearance:
140 mm (approx.)
Weights
Curb Weight:
1505 kg (Sedan) / 1510 kg (Hatchback) (approx.)
Gross Vehicle Weight Rating Gvwr:
Not explicitly specified, but typical for class
Cargo
Trunk Volume:
301 Liters (Sedan) / 293 Liters (Hatchback, with seats up)
🛡️ Safety Features
Ratings
NHTSA Ratings:
Typically rated highly, but specific year data may vary. Check NHTSA for official reports.
Active Features
Traction Control:
Vehicle Dynamics Control (VDC) with sport mode
ABS:
Anti-lock Braking System (ABS) with Electronic Brake-force Distribution (EBD)
AWD:
Symmetrical All-Wheel Drive System
Passive Features
Airbags:
Front, Side, Curtain Airbags
Seatbelts:
3-point ELR seatbelts with pretensioners and load limiters
Child Seat Anchors:
LATCH (Lower Anchors and Tethers for CHildren) system
💡 Technology Features
Infotainment
Infotainment System:
Standard touchscreen audio system with CD, MP3, Bluetooth, USB, and AUX inputs. Higher trims may feature navigation.
Speaker System:
Typically 6-speaker or 9-speaker premium audio systems (e.g., Harman Kardon).
Driver Assistance
Cruise Control:
Standard electronic cruise control.
Keyless Entry:
Standard keyless entry and ignition (push-button start).
Connectivity
Bluetooth:
Standard Bluetooth connectivity for hands-free calling and audio streaming.
Usb Port:
Standard USB and auxiliary input ports.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 3,000-5,000 miles or 6 months, whichever comes first (severe duty) or 7,500 miles / 12 months (normal duty), refer to manual for specifics.
Air Filter Replacement:
Every 15,000-30,000 miles, or as needed based on driving conditions.
Spark Plug Replacement:
Refer to manual, typically around 60,000 miles for iridium plugs.
Coolant Flush:
Every 30,000-60,000 miles or as specified in manual.
Fluid Specifications
Engine Oil Spec:
SAE 5W-30, API SN or higher, Synthetic recommended (e.g., Subaru Synthetic Engine Oil)
Engine Oil Capacity:
5.8 US Quarts (with filter change)
Brake Fluid Spec:
DOT 3 or DOT 4
Power Steering Fluid Spec:
Subaru Genuine Power Steering Fluid or equivalent
Coolant Spec:
Subaru Super Coolant (Blue) or equivalent, 50/50 mix with distilled water
Known Issues
Head Gaskets:
While less common on EJ257 than earlier EJ25 variants, still a potential concern; manual will detail inspection and replacement.
Ringland Failure:
Can occur in high-mileage or heavily modified engines; manual will cover piston/ring diagnostics.
Clutch Wear:
Performance driving can accelerate clutch wear; manual details inspection and replacement procedures.
Oil Consumption:
Some EJ series engines can exhibit oil consumption; manual will guide on diagnosis.
📚 Vehicle History
Brand Heritage
Subaru Rally History:
Decades of success in the World Rally Championship, defining the brand's performance image.
Model Evolution
Impreza Lineage:
The STI model represents the pinnacle of performance tuning for the Impreza platform.
G3 Generation:
This generation saw a shift in styling and platform from previous iterations.
Production
Manufacturing Location:
Japan
Production Period:
2011-2014 (for this specific G3 iteration)
🏆 Awards & Recognition
Recognitions
Motor Trend Λογή:
While the G3 WRX STI itself might not have a specific 'Car of the Year' from MotorTrend for these exact years, the Impreza lineage has been recognized for its performance capabilities.
Car And Driver Λογή:
Often featured on '10Best' lists for its performance and handling in previous iterations. Check specific year reviews for this generation.
Certifications
Euro Ncap Λογή:
The base Impreza models typically receive good Euro NCAP ratings. Specific STI variant testing may differ. Refer to official Euro NCAP archives.