Subaru Impreza WRX 2012 Workshop Service Manual for Repair

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX Year: 2012 Codes Chassis Code: GJ/GP Engine Code: EJ255 (2.5L Turbocharged Boxer) 👋 Introduction Market Position Segment: Compact performance sedan/hatchback Usp:...

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UGS: 427904

Mots clés: 2012 Car Cars Impreza WRX Misc Subaru

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Description

🏷️ Basic Information

Identification

Make:

Subaru

Model:

Impreza WRX

Year:

Codes

Chassis Code:

GJ/GP

Engine Code:

EJ255 (2.5L Turbocharged Boxer)

👋 Introduction

Market Position

Segment:

Compact performance sedan/hatchback

Iconic turbocharged Boxer engine, Symmetrical All-Wheel Drive, rally-bred performance heritage.

Competitive Analysis

Key Competitors:

Mitsubishi Lancer Evolution, Volkswagen GTI, Ford Focus ST, Mazdaspeed3.

Key Features

Performance Focus:

Emphasizes driver engagement and all-weather capability.

AWD System:

Subaru's renowned Symmetrical All-Wheel Drive provides superior traction and handling.

📋 Manual Details

Coverage Areas

Primary Coverage:

North America

Secondary Coverage:

Global markets with potential regional variations

Page Count

Total Pages:

Manual Type

Type:

Workshop Service Manual / Repair Manual

Language

Language:

English

Format

Format:

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Detailed disassembly, assembly, inspection, and repair of all engine components (cylinder head, block, pistons, crankshaft, camshafts, timing system, lubrication, cooling).

Engine Performance:

Turbocharger system, intercooler, intake manifold, exhaust system, fuel injection system, ignition system, emissions control system.

Transmission Manual:

TR6060 (6-speed manual): Disassembly, assembly, clutch system, shift linkage, maintenance procedures.

Transmission Automatic:

Not applicable for WRX models, this manual focuses on the manual transmission.

Drivetrain:

Symmetrical All-Wheel Drive (AWD) system, center differential, rear differential, front axles, rear axles, driveshaft.

Suspension:

Front struts, rear shock absorbers, springs, control arms, stabilizer bars, bushings, wheel bearings, alignment specifications.

Brakes:

Front and rear disc brakes (including Brembo calipers on some trims), ABS system, EBD, brake lines, master cylinder, hydraulic troubleshooting.

Steering:

Power steering system (hydraulic), steering rack, tie rods, steering column, wheel alignment.

Electrical System:

Battery, alternator, starter, wiring diagrams, fuses, relays, lighting system, power windows, power locks, horn, ignition system.

Body And Interior:

Body panels, doors, hood, trunk, interior trim, seats, dashboard, HVAC system, airbags.

Diagnostics:

OBD-II diagnostic trouble codes (DTCs), scan tool procedures, common fault symptoms and their causes, troubleshooting flowcharts.

Procedures Included

Scheduled Maintenance:

Detailed procedures for oil changes, filter replacements, fluid checks and replacements, spark plug replacement, belt inspection and replacement.

Repair Procedures:

Step-by-step guides for virtually all mechanical and electrical repairs, from basic component replacement to complete system overhauls.

Troubleshooting:

Systematic diagnostic approaches for identifying and resolving malfunctions across all vehicle systems.

Component Replacement:

Instructions for replacing parts such as alternators, starters, water pumps, fuel pumps, sensors, actuators, and more.

Specifications And Tolerances:

Crucial torque values, clearances, and measurements for proper assembly and repair.

Wiring Diagrams:

Comprehensive electrical schematics for all vehicle systems, aiding in diagnosis and repair of electrical faults.

Technical Depth

Depth:

Comprehensive (from basic maintenance to complete engine/transmission rebuilds and advanced diagnostics).

📊 Manual Specifications

File Format

Format:

Searchability:

Searchable text within PDF

Print Quality

Quality:

High resolution, suitable for printing

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Type:

EJ255 turbocharged Boxer engine

Displacement:

2.5 Liters (2457 cc)

Configuration:

Horizontally Opposed (Boxer) 4-cylinder

Aspiration:

Turbocharged with intercooler

Performance

Horsepower Hp:

Approx. 305 hp @ 6000 rpm (Varies slightly by region and specific trim)

Torque Lb Ft:

Approx. 290 lb-ft @ 4000 rpm (Varies slightly by region and specific trim)

Fuel System

Fuel Delivery:

Electronic Fuel Injection (EFI), sequential port injection

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

Cooling System

Coolant Type:

Subaru Super Coolant (Blue) or equivalent HOAT coolant

Lubrication System

Oil Type:

SAE 5W-30 Synthetic (refer to manual for specific API/ILSAC ratings)

Oil Capacity Quarts:

5.8 US quarts (with filter change)

🔧 Transmission

Standard

Transmission Type:

6-speed Manual Transmission (TR6060)

Optional

Transmission Type:

Not available for 2012 WRX; a 5-speed auto was available on non-WRX Imprezas.

Features

Clutch Type:

Hydraulically operated, single dry plate

Transmission Fluid Type:

API GL-5, SAE 75W-90 Synthetic Gear Oil (Subaru specification recommended)

📐 Dimensions

Exterior

Length In:

173.8

Width In:

Height In:

Wheelbase In:

104.1

Ground Clearance In:

Weights

Curb Weight Lbs:

Gross Vehicle Weight Rating Lbs:

Cargo

Trunk Volume Cu Ft:

11.3 (Sedan)

Wheels And Tires

Standard Wheel Size:

17 x 8.0 inches

Optional Wheel Size:

18 x 8.5 inches (often on higher trims)

Standard Tire Size:

225/45R17

Optional Tire Size:

245/40R18

Bolt Pattern:

5 x 100 mm

Lug Nut Size:

M12 x 1.25

🛡️ Safety Features

Ratings

NHTSA Front Impact:

5-Star (Driver), 4-Star (Passenger)

NHTSA Side Impact:

5-Star (Driver), 5-Star (Passenger)

IIHS Front Crash Rating:

IIHS Side Crash Rating:

IIHS Roof Strength Rating:

Active Features

Traction Control:

Standard

Electronic Stability Control:

Standard (Vehicle Dynamics Control - VDC)

Anti Lock Braking System:

Standard (ABS)

Electronic Brakeforce Distribution:

Standard (EBD)

Passive Features

Airbags:

Front, Side-Curtain, and Front Seat-Mounted Airbags

Seatbelts:

3-point with pretensioners and load limiters

Child Seat Anchors:

LATCH system

💡 Technology Features

Infotainment

Audio System:

Standard AM/FM/CD/MP3 stereo with auxiliary input. Optional upgraded audio system (e.g., Rockford Fosgate).

Navigation:

Optional factory-installed GPS navigation system.

Bluetooth:

Optional Bluetooth hands-free connectivity.

Driver Assistance

Cruise Control:

Standard

Keyless Entry:

Standard

All Wheel Drive System Control:

Advanced computer control integrated with VDC for optimal traction management.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,750 miles or 6 months for severe driving, 7,500 miles or 12 months for normal driving (refer to manual for specifics).

Air Filter Replacement:

Inspect every 15,000 miles, replace as needed. Replace every 30,000 miles for severe conditions.

Spark Plug Replacement:

Iridium type: 60,000 miles. Inspect at 30,000 miles.

Transmission Fluid Change:

Every 30,000-60,000 miles depending on driving conditions (refer to manual).

Brake Fluid Change:

Every 30,000 miles or 3 years.

Coolant Change:

Initial change at 30,000 miles, then every 30,000 miles thereafter.

Fluid Specifications

Power Steering Fluid:

Subaru Genuine Power Steering Fluid or equivalent Dexron III/Mercon ATF (verify in manual).

Brake Fluid:

DOT 3 or DOT 4 brake fluid (verify in manual).

Clutch Fluid:

DOT 3 or DOT 4 brake fluid (shared with brake system).

Known Issues

Piston Ring Wear:

Some EJ25 engines can experience oil consumption issues due to piston ring wear, particularly with aggressive tuning or insufficient maintenance.

Clutch Wear:

Heavy clutch use or abuse can lead to premature wear, especially in spirited driving scenarios.

Catalytic Converter Issues:

Can become clogged over time, affecting performance and emissions. Regular checks and proper fuel usage are important.

Suspension Component Wear:

Bushings and control arms can wear over time, leading to alignment issues and handling degradation. Regular inspection is recommended.

📚 Vehicle History

Brand Heritage

Rally Roots:

Subaru's extensive World Rally Championship (WRC) success heavily influenced the WRX's development and reputation.

Model Evolution

Impreza Lineage:

The WRX is a performance variant of the Subaru Impreza compact car, first introduced in 1992.

Generation Details:

The 2012 model year is part of the third generation (GE/GH/GR/GV) of the Impreza, though it marked a subtle styling refresh and powertrain update for the WRX.

Wrx Distinction:

The WRX was distinguished from standard Imprezas by its more powerful turbocharged engine, sport-tuned suspension, performance brakes, and aerodynamic enhancements.

Production

Manufacturing Location:

Gunma Manufacturing Plant, Ota, Gunma, Japan

🏆 Awards & Recognition

Recognitions

Sport Compact Car Of The Year:

The Subaru WRX has historically been a strong contender and winner in various "Sport Compact" awards from automotive publications.

Car And Driver 10Best:

While not always a direct entrant, the Impreza platform has been recognized, and the WRX's performance merits comparison with 10Best vehicles.

Rally Heritage Recognition:

Consistently recognized for its motorsport lineage and affordable performance.