🏷️ Basic Information

Make:

Subaru

Model:

Impreza WRX & STI

Model Generation:

Third Generation (GR/GH/GE/GV/GVB)

Model Year:

2013

Chassis Code:

GVB (STI Hatchback), GRF (WRX STI Sedan)

Engine Code Wrx:

EJ255

Engine Code Sti:

EJ257

👋 Introduction

Market Segment:

Performance Compact Sedan/Hatchback, Rally-inspired Sport Compact.

Competitors:

Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus ST, Honda Civic Si.

Performance Focus:

AWD system, turbocharged engines, performance-tuned suspension, driver-centric cockpit.

Enthusiast Base:

Performance driving enthusiasts, rally sport fans, DIY mechanics specializing in performance vehicles.

📋 Manual Details

Coverage:

Comprehensive coverage for all repair and maintenance procedures for the 2013 Subaru Impreza WRX and STI models.

Page Count:

Estimated 2000+ pages (typical for full factory service manuals)

Manual Type:

Factory Service Manual / Workshop Manual

Language:

English

Format:

Digital (likely PDF, sometimes available as printed copy)

📖 Manual Coverage

Engine:

Engine mechanical, lubrication, cooling, fuel, ignition, exhaust, turbocharging, emissions control (EJ255 & EJ257 variants).

Transmission:

Manual transmission (TY757 & TY856), clutch system, drivetrain, differentials (front, center, rear), AWD system.

Brakes:

Brake system hydraulics, ABS, EBD, brake pad replacement, rotor replacement, caliper service, brake bleeding.

Suspension Steering:

Front and rear suspension components, struts, springs, control arms, ball joints, bushings, power steering system, steering rack.

Electrical:

Complete vehicle electrical system, battery, charging system, starting system, lighting, body electrical, power accessories, multiplex communication system.

Body:

Body construction, exterior panels, doors, windows, glass, locks, interior trim, HVAC system, climate control, safety restraint systems (airbags, seatbelts).

Diagnostics:

Diagnostic trouble codes (DTCs), scan tool procedures, troubleshooting flowcharts, wiring diagrams.

Maintenance:

Scheduled maintenance intervals, oil change, filter replacements (oil, air, cabin, fuel), spark plug replacement, fluid checks and changes (coolant, brake, transmission, differential, power steering).

Repair:

Engine rebuild, turbocharger overhaul, transmission overhaul, clutch replacement, brake caliper rebuild, suspension component replacement, electrical component repair.

Troubleshooting:

Detailed diagnostic procedures for common and complex issues, symptom-based troubleshooting guides.

Installation:

Component installation and removal procedures, including engine, transmission, suspension, body panels, and electrical modules.

Depth:

Extensive technical detail covering basic repairs to complete overhauls, including torque specifications, clearance measurements, and diagnostic procedures.

📊 Manual Specifications

Digital Format:

PDF (Searchable text, high-resolution diagrams)

Diagram Quality:

High-quality, detailed diagrams and illustrations as provided by the manufacturer.

Binding:

N/A (Digital Format) - If printed, typically bound for durability.

Paper Quality:

N/A (Digital Format) - If printed, typically on durable, high-gloss paper.

⚙️ Engine Specifications

Engine Type Wrx:

2.5L DOHC turbocharged flat-four (EJ255)

Engine Type Sti:

2.5L DOHC turbocharged flat-four (EJ257 with AVCS)

Horsepower Wrx:

265 hp @ 6000 rpm

Torque Wrx:

244 lb-ft @ 4000 rpm

Horsepower Sti:

305 hp @ 6000 rpm

Torque Sti:

290 lb-ft @ 4000 rpm

Fuel Delivery:

Sequential multi-port fuel injection (SFI), Electronic Throttle Control (ETC) with Drive-by-Wire.

Octane Rating Required:

Premium Unleaded Gasoline (91 Octane or higher recommended)

Coolant Type:

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

🔧 Transmission

Transmission Type Wrx:

5-speed manual (TY757)

Transmission Type Sti:

6-speed manual (TY856)

Automatic Transmission:

Not available for 2013 WRX/STI

Drivetrain:

Symmetrical All-Wheel Drive (AWD) with front helical limited-slip differential, DCCD (Driver Controlled Center Differential) on STI, viscous coupling center differential on WRX.

Manual Transmission Fluid Type:

Subaru Extra-S Gear Oil (75W-90 GL-5) or equivalent.

Manual Transmission Fluid Capacity:

Approx. 2.5 Liters (TY757 WRX), Approx. 3.4 Liters (TY856 STI)

📐 Dimensions

Length Hatchback:

173.8 inches (4415 mm)

Length Sedan:

180.5 inches (4585 mm)

Width:

70.1 inches (1780 mm)

Height:

57.9 inches (1470 mm) for sedan, 58.1 inches (1475 mm) for hatchback

Wheelbase:

103.2 inches (2620 mm)

Curb Weight Wrx Hatch:

Approx. 3,360 lbs (1524 kg)

Curb Weight Sti Sedan:

Approx. 3,373 lbs (1530 kg)

Gross Vehicle Weight Rating:

Approx. 4,343 lbs (1970 kg)

Cargo Volume Hatchback:

19.1 cu ft (with rear seats up)

Cargo Volume Sedan:

11.3 cu ft

🛡️ Safety Features

NHTSA Front Crash Rating:

5-Star (for 2013 Impreza models)

IIHS Top Safety Pick:

Yes (for 2013 Impreza models)

Traction Control:

Yes (Subaru Vehicle Dynamics Control - VDC)

ABS:

Yes (4-wheel Anti-lock Braking System with Electronic Brake-force Distribution - EBD)

Limited Slip Differential:

Helical LSD (Front), DCCD (STI Center), Helical LSD (Rear on STI)

Airbags:

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

Seatbelts:

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

Child Seat Anchors:

LATCH (Lower Anchors and Tethers for Children) system.

💡 Technology Features

Headunit Features:

Standard AM/FM/CD/MP3 audio system, optional navigation system, Bluetooth connectivity for hands-free calling and audio streaming.

Cruise Control:

Standard electronic cruise control.

Keyless Entry:

Standard keyless entry system.

Usb Aux Ports:

Available USB and auxiliary input jacks for audio devices.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles or 6 months, whichever comes first (severe driving conditions) OR 7,500 miles or 12 months (normal driving conditions). Check manual for specifics.

Air Filter Replacement:

Inspect every 15,000 miles, replace as needed.

Cabin Filter Replacement:

Inspect every 7,500 miles, replace as needed.

Brake Fluid Change:

Recommended every 30,000 miles or 2 years.

Spark Plug Replacement:

Approx. 30,000 miles (NGK Iridium recommended)

Engine Oil Type Capacity:

5W-30 Synthetic (API SN or newer), Approx. 5.1 US Quarts (4.8 Liters) for EJ255/EJ257.

Coolant Capacity:

Approx. 7.0 US Quarts (6.6 Liters)

Ring Land Failure:

Prevalence in EJ25 engines under aggressive tuning or sustained high loads, particularly with the EJ257. Proper maintenance and avoiding excessive detonation is critical.

Clutch Wear:

Can be accelerated by aggressive driving, performance modifications, or frequent clutch-to-start launches.

Turbocharger Failure:

Can occur due to oil starvation, contamination, or exceeding operational limits. Regular oil changes and proper cool-down are essential.

📚 Vehicle History

Subaru Rally Legacy:

Subaru's long and successful history in world rally championships (WRC) directly influences the WRX and STI models.

Third Gen Impreza:

This generation (GR/GH/GE/GV) represented a significant styling shift, moving to hatchback and sedan body styles, with the STI retaining its performance identity.

Assembly Location:

Ota City, Gunma Prefecture, Japan

🏆 Awards & Recognition

Performance Acclaim:

Consistently praised by automotive media for its performance, handling, and rally heritage.