2007 SUBARU IMPREZA WRX STI Service & Repair Manual-PDF

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2007 Chassis Code: GDB-F Production Generation: Third Generation (GD/GG) Codes Engine Code: EJ257 👋 Introduction Market Position Market Segment:...

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Mots clés: 2007 Car Cars IMPREZA WRX STI Misc Subaru

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Description

🏷️ Basic Information

Identification

Make:

Subaru

Model:

Impreza WRX STI

Year:

Chassis Code:

GDB-F

Production Generation:

Third Generation (GD/GG)

Codes

Engine Code:

EJ257

👋 Introduction

Market Position

Market Segment:

Performance Compact Sedan/Hatchback

Competitive Set:

Mitsubishi Lancer Evolution, Subaru Impreza WRX (non-STI variants), Mitsubishi Eclipse GT, Mazda Mazdaspeed3.

Competitive Analysis

World Rally Championship (WRC) heritage, Symmetrical All-Wheel Drive, potent turbocharged Boxer engine, driver-focused dynamics.

Key Features

Performance Focus:

Emphasis on handling, acceleration, and driver engagement.

All Wheel Drive:

Standard Symmetrical All-Wheel Drive system providing exceptional traction and stability.

Engine Technology:

Turbocharged Boxer engine with intercooler and advanced engine management.

📋 Manual Details

Coverage Areas

Manual Type:

Complete Official Service & Repair Manual

Language:

English

Format:

Content Scope:

All models and all engines for 2007 Impreza WRX STI

Page Count

Estimated Page Count:

Over 2000

📖 Manual Coverage

Systems Covered

Engine:

Detailed diagnostics, repair, and overhaul of the EJ257 turbocharged Boxer engine, including fuel injection, ignition, lubrication, cooling, and emissions systems.

Transmission:

Comprehensive coverage of the 6-speed manual transmission (TY856WR) and its associated clutch system, including repair procedures and fluid specifications.

Drivetrain:

Detailed information on the Subaru Symmetrical All-Wheel Drive system, including front and rear differentials, driveshafts, and viscous coupling unit (VCU) maintenance and repair.

Suspension:

Front and rear suspension systems, including struts, springs, control arms, sway bars, and alignment specifications.

Brakes:

Front Brembo 4-piston calipers and rear Brembo 2-piston calipers, ABS system, brake fluid specifications, and repair procedures.

Steering:

Power steering system, steering column, and wheel assembly.

Electrical System:

Complete wiring diagrams, component locations, fuse box layouts, battery, alternator, starter, lighting, and accessory systems.

Body And Chassis:

Body panel removal and installation, interior trim, chassis components, and structural information.

HVAC:

Heating, ventilation, and air conditioning (HVAC) system diagnostics and repair.

Comfort And Convenience:

Power windows, locks, mirrors, seats, and other interior amenities.

Procedures Included

Routine Maintenance:

Oil changes, filter replacements, fluid checks and top-offs, tire rotations, spark plug replacement, and belt inspections.

Troubleshooting:

Diagnostic flowcharts and procedures for common and uncommon issues across all vehicle systems.

Repair Procedures:

Step-by-step guides for engine rebuilds, transmission overhauls, brake component replacement, suspension work, electrical component repair, and bodywork.

Specifications And Data:

Torque specifications, clearances, diagnostic trouble codes (DTCs), wiring diagrams, and component testing procedures.

Component Replacement:

Detailed instructions for replacing major components such as the turbocharger, intercooler, fuel injectors, catalytic converter, and more.

Technical Depth

Depth:

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

📊 Manual Specifications

File Format

Format:

PDF (Portable Document Format)

Searchability:

Fully searchable text for quick information retrieval.

Print Quality:

High-resolution, suitable for printing individual pages or sections.

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Type:

2.5L Turbocharged DOHC 16-valve Boxer 4-cylinder

Engine Code:

EJ257

Performance

Horsepower Hp:

305 hp @ 5600 rpm

Torque Lb-Ft:

290 lb-ft @ 3500 rpm

Redline:

7000 rpm

Fuel System

Fuel Type:

Unleaded premium gasoline (91 octane or higher recommended)

Fuel Delivery:

Sequential multi-port fuel injection (MPI)

Turbocharger:

IHI VF39 (or similar variant), air-to-air intercooler

Engine Build

Block Material:

Aluminum

Cylinder Head Material:

Aluminum

Bore X Stroke:

99.5 mm x 79.0 mm

Compression Ratio:

8.2:1

🔧 Transmission

Standard

Type:

6-speed Manual

Model Code:

TY856WR

Features

Drivetrain Layout:

Subaru Symmetrical All-Wheel Drive with Front Helical LSD, Rear Viscous LSD

Fluid Specifications

Manual Transmission Fluid:

Subaru Extra-S Gear Oil (or equivalent API GL-5, SAE 75W-90)

📐 Dimensions

Exterior

Length:

173.8 inches (4415 mm)

Width:

69.1 inches (1755 mm)

Height:

57.7 inches (1465 mm)

Wheelbase:

103.0 inches (2615 mm)

Front Track:

59.3 inches (1505 mm)

Rear Track:

59.1 inches (1500 mm)

Weights

Curb Weight:

Approximately 3241 lbs (1470 kg)

Gross Vehicle Weight Rating:

4598 lbs (2085 kg)

Towing Capacity:

Not Recommended

Cargo

Trunk Volume:

Approximately 11.4 cu ft (Sedan)

🛡️ Safety Features

Ratings

NHTSA Front Impact:

5-Star

NHTSA Side Impact:

5-Star

IIHS Front Offset:

IIHS Side Impact:

Active Features

4-wheel ABS with Electronic Brake-force Distribution (EBD)

Traction Control:

Yes (Vehicle Dynamics Control - VDC)

Stability Control:

Yes (Vehicle Dynamics Control - VDC)

Passive Features

Airbags:

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

Seatbelts:

3-point front and rear seatbelts with pretensioners and force limiters.

Child Seat Anchors:

LATCH (Lower Anchors and Tethers for Children) system.

💡 Technology Features

Infotainment

Head Unit:

Stock Subaru head unit with CD player, radio, and basic audio controls. Optional navigation systems may be available.

Audio System:

Typically a 6-speaker or 10-speaker system with subwoofer, depending on trim. Bose premium audio available.

Driver Assistance

Traction Control:

Vehicle Dynamics Control (VDC) system, which integrates ABS, traction control, and stability control.

All Wheel Drive:

Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) allowing manual adjustment of front-to-rear torque split.

Connectivity

Auxiliary Input:

Standard 3.5mm auxiliary audio input jack.

Cruise Control:

Standard electronic cruise control.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000-5,000 miles (5,000-8,000 km) or 6 months, depending on driving conditions (severe service requires more frequent changes).

Engine Air Filter Replacement:

Every 15,000-30,000 miles (24,000-48,000 km) or as needed based on inspection.

Cabin Air Filter Replacement:

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

Spark Plug Replacement:

Platinum: 60,000 miles (96,000 km). Iridium: 100,000 miles (160,000 km). (Check specific plug type installed).

Timing Belt Replacement:

N/A (This engine uses a timing chain).

Transmission Fluid Change:

Every 30,000-60,000 miles (48,000-96,000 km) for manual transmission.

Differential Fluid Change:

Front & Rear: Every 30,000-60,000 miles (48,000-96,000 km).

Fluid Specifications

Engine Oil Type:

SAE 5W-30 Synthetic (API SN or newer, ILSAC GF-5 or newer recommended). Check owner's manual for specific viscosity in extreme climates.

Engine Oil Capacity:

5.5 US quarts (5.2 Liters) with filter change.

Coolant Type:

Subaru Super Coolant (Blue) or equivalent ethylene glycol-based antifreeze with Subaru additives. Mix 50/50 with distilled water.

Brake Fluid Type:

DOT 3 or DOT 4

Power Steering Fluid Type:

Subaru Genuine ATF-HP or equivalent Dexron-III/Mercon compatible fluid.

Known Issues

Head Gaskets:

While less common on the EJ257 compared to some other Subaru engines, internal coolant leaks can occur. Regular checks are advised.

Clutch Wear:

Aggressive driving can lead to premature clutch wear. The clutch assembly is a wear item.

Turbocharger Wear:

The VF39 turbocharger can be susceptible to wear if oil changes are neglected or if subjected to extreme heat cycles. Proper warm-up and cool-down are crucial.

Spark Plug Fouling:

Can occur if oil consumption is high or if the engine is run with rich fuel mixtures.

Differential Lock Issues:

Problems with the Driver Controlled Center Differential (DCCD) can arise due to electrical faults or mechanical wear over time.

Front Suspension Components:

Bushings and ball joints can wear, leading to clunking noises and alignment issues, especially under spirited driving.

📚 Vehicle History

Brand Heritage

Heritage:

Subaru's long-standing success in motorsports, particularly in the World Rally Championship (WRC), heavily influenced the development and identity of the WRX STI models.

Model Evolution

Generation Designation:

The 2007 model represents the final iteration of the second-generation Impreza platform (GD/GG) for the STI.

Key Changes From Previous:

The 2007 model received powertrain and chassis refinements over earlier GD chassis STIs, including the larger front brakes and updated DCCD (Driver Controlled Center Differential).

Production

Manufacturing Location:

Gunma, Japan

Production Years For Chassis:

2002-2007 (GD/GG chassis)

🏆 Awards & Recognition

Recognitions

Performance Awards:

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

Motorsport Legacy:

Direct lineage and technology derived from Subaru's World Rally Championship (WRC) winning cars, lending significant prestige and performance credibility.