🏷️ Basic Information

Make:

Subaru

Model:

Impreza WRX & STI

Year:

2012

Chassis Code:

GE/GH/GR/GV

Engine Codes:

EJ255 (WRX), EJ257 (STI)

👋 Introduction

Segment:

Performance Compact Sedan/Hatchback

Target Audience:

Enthusiast drivers, tuners, owners seeking detailed DIY repair information.

Competitors:

Mitsubishi Lancer Evolution, Volkswagen GTI, Mazdaspeed3

Performance Heritage:

Renowned for rally heritage, turbocharged Boxer engines, and Symmetrical All-Wheel Drive.

Model Variants:

WRX (sport-tuned) and STI (motorsport-derived homologation special).

📋 Manual Details

Coverage:

Full vehicle service and repair

Estimated Pages:

Approx. 2000+

Type:

Factory Service Manual / Workshop Manual

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Powertrain:

Engine (2.5L Turbo EJ255/EJ257), Transmission (Manual), Drivetrain (AWD)

Chassis:

Suspension, Steering, Brakes, Wheels & Tires

Electrical:

Engine Control Module (ECM), Body Control Module (BCM), Lighting, Audio, HVAC, SRS (Airbag), Security System

Body:

Exterior Body Panels, Interior Trim, Glass, Doors, Seats

Maintenance:

Scheduled maintenance, fluid changes, filter replacements, inspections

Diagnostics:

Troubleshooting guides, diagnostic trouble codes (DTCs), wiring diagrams, component testing

Repair:

Engine overhaul, transmission rebuild, brake caliper replacement, suspension component renewal, electrical component repair

Installation:

Component replacement, accessory installation (where applicable)

Depth:

Comprehensive: From basic fluid checks to full engine and transmission rebuilds, including detailed electrical schematics and diagnostic procedures.

📊 Manual Specifications

Format Details:

Searchable PDF with hyperlinked sections for easy navigation.

Quality:

High-resolution images, clear text, professional layout.

Type:

N/A (Digital Download)

Type:

N/A (Digital Download)

⚙️ Engine Specifications

Type:

2.5L Turbocharged Boxer-4 (EJ255)

Horsepower Hp Wrx:

265 hp @ 6000 rpm

Torque Lb Ft Wrx:

244 lb-ft @ 2000 rpm

Type:

2.5L Turbocharged Boxer-4 (EJ257)

Horsepower Hp Sti:

305 hp @ 6000 rpm

Torque Lb Ft Sti:

290 lb-ft @ 4000 rpm

Type:

Sequential Multi-Port Fuel Injection (MPI)

Fuel Requirement:

Premium Unleaded Gasoline (91 Octane or higher recommended)

ECU:

Engine Control Unit (ECU) with advanced tuning capabilities.

🔧 Transmission

Type:

6-Speed Manual Transmission

Type:

N/A (Manual transmission only for these performance variants)

System:

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

Type:

Hydraulic Actuated, Single Dry Plate Clutch

📐 Dimensions

Length In:

179.7 inches

Width In:

70.7 inches

Height In:

58.1 inches

Length In:

173.8 inches

Width In:

70.7 inches

Height In:

58.1 inches

Wheelbase:

103.2 inches

Curb Weight Lbs:

3200-3400 lbs (approx., depending on trim/body style)

🛡️ Safety Features

NHTSA Overall Rating:

5-Star (for the standard Impreza platform, specific WRX/STI ratings may vary slightly)

ABS:

Anti-lock Braking System (ABS)

Esc:

Electronic Stability Control (VDC - Vehicle Dynamics Control)

Traction Control:

Traction Control System (TCS)

Airbags:

Front, Side Curtain, and Knee Airbags

Structure:

Advanced front and side-impact energy-absorbing structure

💡 Technology Features

System Features:

Base audio system with CD player, MP3 capability, and auxiliary input. Optional navigation system available on some trims.

Features:

ABS, VDC, TCS, standard cruise control.

Ports:

Auxiliary audio input jack.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles or 3 months (severe use) / 7,500 miles or 6 months (normal use)

Air Filter Interval:

Inspect every 15,000 miles, replace as needed.

Spark Plug Interval:

Approx. 30,000-60,000 miles (depending on plug type, Irridium recommended)

Timing Belt Interval:

N/A (Subaru EJ25 engines utilize a timing chain system, which generally does not require periodic replacement unless worn.)

Engine Oil:

SAE 5W-30, API SG or higher (check manual for specific certifications, synthetic recommended for performance)

Coolant:

Subaru Super Coolant (Blue) or equivalent (50/50 mix with distilled water)

Transmission Fluid:

API GL-4 or GL-5, 75W-90 (manual transmission)

Differential Fluid Front:

API GL-5, 75W-90

Differential Fluid Rear:

API GL-5, 75W-90 (limited-slip differentials may have specific additives or oil types, check manual)

Engine Wear:

Ring land failures ( EJ25 engines), head gasket leaks (less common in later models but still possible), oil consumption.

Transmission Issues:

Clutch wear, especially with aggressive driving. Gear grinding can occur if fluid is neglected.

Suspension:

Strut failure, bushing wear common with high mileage and performance driving.

Turbocharger:

Turbocharger wear and failure can occur due to lack of proper warm-up/cool-down and oil maintenance.

📚 Vehicle History

Heritage:

Subaru's deep roots in rally racing and motorsport, leading to the development of performance-oriented models.

Third Generation:

This 2012 model is part of the third generation (GE/GH/GR/GV) Impreza, which introduced a more mainstream design and the WRX/STI continued on a shared platform with the standard Impreza, unlike previous generations which had unique bodies.

Production Period:

2007-2014 (Third Generation platform)

Manufacturing Location:

Japan

🏆 Awards & Recognition

Automotive Journalism:

Consistently praised by automotive media for its performance, handling, and rally-inspired capabilities. Often featured in 'best performance car' lists.