🏷️ Basic Information

Make:

Subaru

Model:

Impreza WRX STI

Year:

2013

Chassis Code:

GV/GR (Hatchback)

Engine Code Variant:

EJ257 (2.5L Turbocharged Boxer)

👋 Introduction

Category:

Performance Compact Sedan/Hatchback

Target Audience:

Enthusiasts, rally fans, performance-oriented drivers, owners seeking in-depth maintenance and repair knowledge.

Key Competitors:

Mitsubishi Lancer Evolution, Subaru WRX (non-STI variants), Volkswagen Golf GTI/R, Ford Focus RS, Honda Civic Type R.

Performance Focus:

Emphasizes the performance capabilities and specific tuning aspects of the WRX STI model.

User Friendliness:

Designed to be accessible for basic users ('basic skills required') while providing depth for advanced tasks.

Portability:

Digital format allows for easy storage and access on various devices.

📋 Manual Details

Primary Coverage:

Complete Service and Repair for 2013 Subaru Impreza WRX STI

Estimated Page Count:

2000+

Type:

Factory Service Manual (FSM) / Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine:

Complete overhaul, disassembly, assembly, diagnosis, and repair of the EJ257 engine (including turbocharger system, intercooler, fuel injection, ignition, emissions controls).

Transmission:

Manual Transmission (TY757) servicing, repair, clutch system, driveline components (front/rear differentials, driveshafts, CV joints).

Brakes:

Hydraulic brake system, ABS, EBD, brake fluid service, caliper/rotor replacement, parking brake, bleeding procedures.

Suspension:

Front and rear suspension components, struts, springs, bushings, alignment procedures, AWD system servicing (e.g., DCCD operation).

Steering:

Power steering system (hydraulic), steering rack and pinion, tie rods, steering column.

Electrical:

Complete wiring diagrams, fuse box layouts, lighting systems, power windows, mirrors, locks, instrument cluster, starter, alternator, battery, ECU diagnostics, SRS (airbag) system.

Body:

Body panel removal/installation, door mechanisms, interior trim, glass replacement, exterior trim, bumpers, chassis repair principles.

HVAC:

Heating, Ventilation, and Air Conditioning system diagnosis and repair, refrigerant handling, A/C compressor, evaporator, condenser.

Diagnostics:

OBD-II diagnostic trouble codes (DTCs), Subaru Select Monitor (SSM) usage, diagnostic procedures for all major systems.

Maintenance:

Oil and filter changes, spark plug replacement, air filter replacement, cabin air filter replacement, brake fluid flush, coolant flush, differential fluid change, transfer case fluid change.

Troubleshooting:

Systematic troubleshooting guides for common and uncommon issues, diagnostic flowcharts, symptom-based diagnosis.

Repair:

Detailed step-by-step repair instructions for engine components, transmission, brakes, suspension, electrical systems, and bodywork.

Overhaul:

Complete engine rebuild procedures, transmission overhaul, differential rebuild.

Installation:

Component replacement and installation guides (e.g., turbocharger replacement, clutch replacement, suspension component upgrades).

Depth:

Comprehensive, covering from basic maintenance to complete engine and transmission rebuilds. Suitable for professional technicians and advanced DIY enthusiasts.

📊 Manual Specifications

File Type:

PDF

Searchability:

Searchable text content for quick information retrieval.

Resolution:

High-resolution, clear diagrams and text.

Printability:

Printable pages for workshop use.

Binding:

N/A (Digital format)

Paper:

N/A (Digital format)

⚙️ Engine Specifications

Engine Type:

Horizontally-Opposed (Boxer) Turbocharged DOHC

Displacement:

2457 cc (2.5 Liters)

Bore X Stroke:

99.5 mm x 79.0 mm

Horsepower:

305 hp @ 6000 rpm

Torque:

290 lb-ft (393 Nm) @ 4000 rpm

Redline:

7000 rpm

Fuel Delivery:

Sequential Multi-Point Fuel Injection (MPI)

Fuel Type:

Premium Unleaded Gasoline (91 Octane or higher recommended)

Coolant Type:

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

Coolant Capacity:

Approx. 7.2 Liters (7.6 US Quarts)

Oil Type:

SAE 5W-30 Synthetic (API SN or ILSAC GF-5 certified)

Oil Capacity:

Approx. 5.1 Liters (5.4 US Quarts) with filter

Oil Filter Part Number:

Subaru 15208AA100 (example, check specific application)

Turbo Model:

IHI VF48

Intercooler:

Top-mount, air-to-air

🔧 Transmission

Type:

6-Speed Manual (TY757)

Gear Ratios 1-6:

3.333 / 2.000 / 1.333 / 1.000 / 0.777 / 0.650

Reverse Gear Ratio:

3.740

Final Drive Ratio:

4.111

Fluid Type:

Subaru Extra-S Manual Transmission Fluid or equivalent API GL-5 75W-90

Fluid Capacity:

Approx. 2.4 Liters (2.5 US Quarts)

AWD System:

Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD)

Dccd Modes:

Manual and Auto modes with varying front/rear torque bias settings.

📐 Dimensions

Length:

179.9 inches (4570 mm)

Width:

70.7 inches (1795 mm)

Height:

58.1 inches (1475 mm)

Wheelbase:

103.2 inches (2620 mm)

Ground Clearance:

Approx. 5.0 inches (127 mm)

Wheel Base Pattern:

5x100 mm

Wheel Size Standard:

17x8.0 inch (common for base WRX, STI often had 18-inch)

Wheel Size Sti:

18x8.5 inch

Tire Size Sti:

245/40R18

Curb Weight:

Approx. 3373 lbs (1530 kg) for Hatchback

Gross Vehicle Weight Rating:

Approx. 4431 lbs (2010 kg)

Cargo Volume Hatchback:

Approx. 19.0 cu ft (with rear seats up)

🛡️ Safety Features

NHTSA Overall Rating:

4/5 Stars (for 2013 Impreza line, STI specifics may vary)

IIHS Top Safety Pick:

Yes (for 2013 Impreza line, STI specifics may vary)

Traction Control:

Yes, with SI-Drive system integration.

Electronic Stability Control:

Yes, Vehicle Dynamics Control (VDC).

Antilock Brakes:

Yes, 4-wheel disc ABS with Electronic Brake-force Distribution (EBD).

Brake Assist:

Yes

All Wheel Drive:

Standard Symmetrical AWD with DCCD.

Airbags:

Front dual-stage airbags, front side-impact airbags, front and rear side-curtain airbags, driver's knee airbag.

Seatbelts:

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

Child Seat Anchors:

LATCH (Lower Anchors and Tethers for CHildren) system.

💡 Technology Features

Head Unit:

Standard AM/FM/CD/MP3 stereo with auxiliary input, USB port, and Bluetooth connectivity.

Display:

Multi-function display in dashboard for trip computer, fuel economy, climate control, and vehicle settings.

Si Drive:

Subaru Intelligent Drive system offering 'Intelligent', 'Sport', and 'Sport Sharp' modes to adjust engine mapping, throttle response, and DCCD behavior.

Keyless Entry:

Standard

Bluetooth:

Hands-free calling and audio streaming.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles (6,000 km) or 6 months (severe service) / 7,500 miles (12,000 km) or 12 months (normal service).

Air Filter Replacement:

Every 15,000 miles (24,000 km) or 12 months.

Cabin Filter Replacement:

Every 15,000 miles (24,000 km) or 12 months.

Spark Plug Replacement:

Every 30,000 miles (48,000 km) (iridium type).

Brake Fluid Flush:

Every 30,000 miles (48,000 km) or 3 years.

Coolant Flush:

First at 30,000 miles (48,000 km), then every 30,000 miles (48,000 km) or 2 years thereafter.

Transmission Fluid Change:

Every 30,000 miles (48,000 km) (severe use/track use recommended).

Differential Fluid Change:

Every 30,000 miles (48,000 km).

Power Steering Fluid:

ATF Dexron III or equivalent.

Brake Fluid:

DOT 3 or DOT 4.

Engine:

Head gasket failures (less common in EJ257 compared to earlier EJ25s but still possible under abuse), piston ring land cracking (particularly with aggressive tuning), oil consumption, turbocharger seal leaks.

Transmission:

Clutch wear, synchronizer issues in manual transmissions under hard use.

Suspension:

Worn bushings, premature strut failure if subjected to harsh driving.

Electrical:

Occasional issues with ABS sensors, minor electrical gremlins.

📚 Vehicle History

Rally Roots:

Subaru's long and successful history in the World Rally Championship (WRC), with the Impreza WRX STI being its iconic rally homologation special.

Generations:

The 2013 model is part of the third generation (GR/GV) Impreza WRX STI, which transitioned from the sedan-only (GR) to offer a hatchback (GV) body style, replacing the separate Impreza WRX STI nameplate with a more unified Impreza line.

Specific Enhancements 2013:

While the STI retained its core EJ257 engine and mechanicals from the previous years, this generation saw refinements in suspension tuning and chassis rigidity.

Manufacturing Location:

Gunma Plant, Japan

🏆 Awards & Recognition

Motorsport Legacy:

While specific 2013 awards may not be prominent, the WRX STI lineage consistently garners recognition for its rally heritage and performance credentials.

Performance Car Awards:

Often cited in performance car comparisons and enthusiast publications for its AWD grip and dynamic capability.