🏷️ Basic Information

Make:

Subaru

Model:

Impreza WRX & WRX STI

Production Year:

2011

Chassis Code Wrx:

GE8/GH8

Chassis Code Wrx Sti:

GR8/GV8

👋 Introduction

Vehicle Segment:

Compact Sport Sedan/Hatchback

Target Audience:

Enthusiast drivers, rally sport fans, performance-oriented individuals.

Key Competitors:

Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus RS (in performance variants).

Performance Focus:

Turbocharged engines, Symmetrical All-Wheel Drive, performance-tuned suspension, powerful braking systems.

Rally Heritage:

Direct lineage from Subaru's successful World Rally Championship (WRC) campaigns.

Manual Value Proposition:

Empowers owners and technicians with the knowledge to maintain, diagnose, and repair these high-performance vehicles, ensuring optimal performance and longevity.

📋 Manual Details

Manual Type:

Service and Repair Manual

Language:

English

Format:

Digital (likely PDF, though not explicitly stated, common for this type of product)

Estimated Page Count:

1500+

📖 Manual Coverage

Engine Mechanical:

Detailed overhaul procedures, component testing, timing belt/chain service, valve adjustments, piston and ring replacement, crankshaft and connecting rod service, cylinder head and block repair.

Engine Management:

ECU diagnostics, sensor testing (MAP, MAF, O2, TPS, Crank/Cam position), fuel injector testing and replacement, ignition system troubleshooting (coils, spark plugs), emissions control systems.

Fuel System:

Fuel pump testing and replacement, fuel filter service, fuel pressure regulation, fuel tank and lines inspection and repair.

Transmission Manual:

Clutch inspection and replacement, gearbox overhaul, gear selection mechanisms, driveline components.

Transmission Automatic Sti Specific:

DCCD (Driver's Controlled Center Differential) system diagnostics and service, automatic transmission component overhaul (if applicable to specific STI models of this year).

Drivetrain AWD:

Symmetrical All-Wheel Drive system diagnostics, center differential maintenance, viscous coupling unit, rear differential service, propeller shaft and axle shaft inspection.

Suspension:

Front and rear strut and shock absorber replacement, spring service, control arm bushing inspection and replacement, wheel bearing service, alignment procedures.

Steering:

Power steering system diagnostics (hydraulic or electric), steering rack inspection and repair, steering column components, alignment specifications.

Brakes:

Brake system diagnostics, brake pad and rotor replacement, brake caliper service, brake line inspection and replacement, ABS (Anti-lock Braking System) diagnostics, EBD (Electronic Brake-force Distribution) system.

Electrical System:

Wiring diagrams, component location charts, starter motor and alternator testing, battery service, fuse and relay identification, lighting systems, horn, wipers.

Body Exterior:

Panel removal and installation (hood, doors, fenders, bumpers), hinge and lock service, glass replacement, trim piece identification, aerodynamic components (spoilers, diffusers).

Body Interior:

Seat removal and installation, dashboard disassembly, interior trim panel service, HVAC controls, headliner, carpet replacement.

HVAC:

Air conditioning system service (refrigerant handling, component testing), heater core replacement, blower motor service, climate control system diagnostics.

Safety Systems:

Airbag system diagnostics and component replacement, SRS (Supplemental Restraint System) precautions, seatbelt mechanisms.

Scheduled Maintenance:

Detailed maintenance schedules by mileage/time, oil change procedures, filter replacements (oil, air, cabin), fluid checks and top-offs, tire rotation and pressure checks.

Troubleshooting:

Symptom-based diagnostic flowcharts, fault code interpretation, diagnostic trouble codes (DTCs) for various ECUs, common problem diagnosis.

Repair Procedures:

Step-by-step instructions for component removal, installation, and adjustment, including torque specifications for all fasteners.

Diagnostics:

On-board diagnostics (OBD-II) procedures, scan tool usage, live data interpretation, specific subsystem diagnostics.

Electrical Diagnostics:

Circuit testing, voltage drop testing, continuity checks, resistance measurements, multimeter usage, wiring diagram interpretation.

Depth Level:

Comprehensive and in-depth, covering everything from basic fluid changes to full engine and transmission rebuilds.

Detail Level:

Detailed explanations, diagnostic charts, diagrams, specifications, and procedures suitable for professional technicians and advanced DIY enthusiasts.

📊 Manual Specifications

File Type:

Likely PDF for digital distribution, offering searchability and hyperlinking.

Image Resolution:

High-resolution for clear diagrams and illustrations.

Binding Style:

N/A (for digital format) / If printed, likely spiral-bound or comb-bound for lay-flat usability.

Paper Quality:

N/A (for digital format) / If printed, typically durable paper suitable for workshop environments.

⚙️ Engine Specifications

Engine Code:

EJ255

Configuration:

2.5L Boxer-4 Turbocharged

Horsepower Wrx:

265 hp @ 5200 rpm

Torque Wrx:

244 lb-ft @ 2000 rpm

Engine Code:

EJ257

Configuration:

2.5L Boxer-4 Turbocharged (Semi-Closed Deck)

Horsepower Sti:

305 hp @ 6000 rpm

Torque Sti:

290 lb-ft @ 4000 rpm

Injection Type:

Sequential Multi-Port Fuel Injection (MPI)

Fuel Type:

Premium Unleaded Gasoline (91 Octane or higher recommended)

🔧 Transmission

Transmission Type:

6-Speed Manual

Drivetrain:

Symmetrical All-Wheel Drive

Transmission Type:

6-Speed Manual

Drivetrain:

Symmetrical All-Wheel Drive with DCCD

Transmission Fluid Spec Wrx Sti:

Subaru Extra-S Gear Oil (API GL-5, SAE 75W-90) for manual transmissions and differentials.

📐 Dimensions

Length:

4,580 mm (179.9 in)

Width:

1,795 mm (70.7 in)

Height:

1,475 mm (58.1 in)

Length:

4,415 mm (173.8 in)

Width:

1,795 mm (70.7 in)

Height:

1,445 mm (56.9 in)

Curb Weight Wrx Sedan:

Approx. 1,505 kg (3,318 lbs)

Curb Weight Wrx Hatchback:

Approx. 1,520 kg (3,351 lbs)

Curb Weight Wrx Sti Sedan:

Approx. 1,535 kg (3,384 lbs)

Curb Weight Wrx Sti Hatchback:

Approx. 1,550 kg (3,417 lbs)

Wheelbase:

2,650 mm (104.3 in)

Wheel Bolt Pattern:

5 x 100 mm

Tire Size Wrx:

225/45R17

Tire Size Wrx Sti:

245/40R18

🛡️ Safety Features

NHTSA Front Crash Rating:

5-Star

IIHS Top Safety Pick:

Yes (for most configurations)

ABS:

Standard

Ebs:

Standard

Traction Control:

Standard

Electronic Stability Control:

Standard (Vehicle Dynamics Control - VDC)

Airbags:

Front, Front Side, Side Curtain Airbags

Seatbelts:

3-point front and rear with pretensioners and load limiters

💡 Technology Features

Audio System:

Available CD player, MP3 capability, auxiliary audio input, optional navigation system.

Display:

Center console display for audio and climate control, optional navigation screen.

Cruise Control:

Standard

AWD System Control:

Advanced Symmetrical AWD with Driver's Controlled Center Differential (DCCD) on STI models for enhanced traction and handling control.

Bluetooth:

Available on some trims/options for hands-free calling and audio streaming.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles (6,000 km) or 6 months, whichever comes first, especially under spirited driving conditions. Refer to manual for severe duty recommendations.

Engine Air Filter:

Inspect every 15,000 miles (24,000 km), replace as needed or every 30,000 miles (48,000 km).

Cabin Air Filter:

Inspect every 15,000 miles (24,000 km), replace as needed or every 15,000 miles (24,000 km).

Spark Plugs:

Replace every 60,000 miles (96,000 km) (refer to specific plug type recommendations).

Timing Belt Subaru Boxer:

The EJ255 and EJ257 engines use a timing belt. Replacement interval is typically 105,000 miles (168,000 km) or 7 years. Manual will confirm exact interval and required components (tensioner, idlers, water pump).

Engine Oil Capacity And Type:

5.5 US quarts (5.2 L) with filter. SAE 5W-30 synthetic oil meeting API SN or ILSAC GF-5 specifications. Consult manual for specific ambient temperature recommendations.

Coolant Type:

Subaru Super Coolant (blue) or equivalent P-HOAT coolant. Capacity approx. 7.6 quarts (7.2 L).

Brake Fluid Type:

DOT 3 or DOT 4.

Piston Ring Land Cracking:

A known potential issue in high-mileage or aggressively driven EJ25 engines, particularly the EJ255 and EJ257. Proper maintenance and avoiding detonation are crucial.

Clutch Wear:

Can be accelerated by aggressive driving or frequent launches.

Turbocharger Service:

Requires regular oil changes with quality synthetic oil to prevent premature failure.

📚 Vehicle History

Subaru Motorsports:

Decades of rallying success, forming the foundation for the WRX and WRX STI performance lines.

Third Generation Impreza Platform:

This generation (GE/GH/GR/GV) marked a significant styling departure, with the WRX and WRX STI models adopting a more aggressive, distinct appearance.

Wrx Vs Sti Distinction:

The WRX served as the performance baseline, while the STI represented the pinnacle with more power, advanced AWD, larger brakes, and suspension enhancements.

Manufacturing Location:

Japan

🏆 Awards & Recognition

Performance Car Awards:

The Impreza WRX and WRX STI models have consistently received accolades from automotive publications for their performance, handling, and rally-inspired capabilities.