2009 SUBARU IMPREZA WRX STI Service & Repair Manual-PDF

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2009 Engine: 2.5L turbocharged flat-four (EJ257) Body Style: Sedan Codes Chassis Code: GRB (Hatchback), GVB (Sedan) Engine Code: EJ257...

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标签: 2009 Car Cars IMPREZA WRX STI Misc Subaru

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Description

🏷️ Basic Information

Identification

Make:

Subaru

Model:

Impreza WRX STI

Year:

Engine:

2.5L turbocharged flat-four (EJ257)

Body Style:

Sedan

Codes

Chassis Code:

GRB (Hatchback), GVB (Sedan)

Engine Code:

EJ257

👋 Introduction

Market Position

Segment:

Performance compact sedan/hatchback

Target Audience:

Enthusiasts, performance drivers, motorsport participants

Competitive Analysis

Key Competitors:

Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus RS (in certain markets)

Key Features

Performance Focus:

Symmetrical All-Wheel Drive, potent turbocharged engine, performance-tuned suspension

Driver Controls:

Driver-Controlled Center Differential (DCCD), SI-Drive system

Value Proposition

Manual Value:

Essential for owners seeking to maintain, repair, or enhance their high-performance vehicle

📋 Manual Details

Coverage Areas

Coverage Scope:

Complete official service and repair for all models and engines

Page Count

Estimated Pages:

Over 3000 (typical for comprehensive service manuals of this era)

Manual Type

Type:

Official Service and Repair Manual

Language

Language:

English

Format

Format:

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Engine assembly, cylinder head, pistons, crankshaft, camshafts, timing system, lubrication system, cooling system

Engine Performance:

Fuel injection, ignition system, turbocharger system, exhaust system, emissions control

Transmission Drivetrain:

Manual transmission (TY85), clutch, driveshafts, differentials (front, center, rear), AWD system (DCCD)

Suspension Steering:

Front suspension (struts, control arms), rear suspension (multi-link), steering system (power assist), alignment specifications

Brakes:

Front and rear brake systems, ABS, EBD, parking brake, brake fluid specifications

Electrical Electronics:

Battery, charging system, starter motor, lighting, instrument cluster, audio system, power accessories, wiring diagrams

Body Chassis:

Body construction, exterior panels, doors, windows, interior trim, underbody components

HVAC:

Heating, ventilation, and air conditioning systems

Procedures Included

Maintenance:

Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection and replacement

Troubleshooting:

Diagnostic procedures for engine, transmission, electrical, and chassis systems, symptom-based troubleshooting charts

Repair:

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

Diagnostics:

OBD-II diagnostic codes, sensor testing, actuator testing, ECU programming (may require specific tools)

Installation Replacement:

Component removal and installation procedures for all major systems

Technical Depth

Depth:

Comprehensive, covering basic maintenance to full engine and transmission rebuilds

📊 Manual Specifications

File Format

Searchability:

Likely text-searchable PDF, enabling quick information retrieval

Printability:

Printable pages, allowing for physical reference

Version:

Digital (PDF)

Print Quality

Quality:

Digital resolution typically high, ensuring clarity of diagrams and text

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Horizontally Opposed (Boxer) 4-Cylinder, turbocharged and intercooled

Displacement:

2457 cc (2.5 Liters)

Bore X Stroke:

99.5 mm x 80.0 mm

Compression Ratio:

8.2:1

Engine Management:

Multi-point fuel injection with Subaru Engine Management System (EMS)

Performance

Horsepower:

305 hp @ 6000 rpm (USDM)

Torque:

290 lb-ft @ 4000 rpm (USDM)

Fuel System

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

Fuel Delivery:

Electronic Fuel Injection (EFI)

Ignition System:

Electronic ignition with individual coil-on-plug

🔧 Transmission

Standard

Type:

6-speed manual transmission (TY85)

Drivetrain:

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

Optional

Type:

N/A (Only manual transmission offered for STI in this generation)

Features

Dccd Modes:

Auto, Manual (6 settings for front/rear torque bias)

Differentials:

Helical Limited Slip Front Differential, Viscous Center Coupling, Torsen Limited Slip Rear Differential

Fluid Specifications

Manual Transmission Fluid:

Subaru Extra-S (or equivalent API GL-5, SAE 75W-90) for transmission and front/rear differentials

📐 Dimensions

Exterior

Length:

4415 mm (173.8 in)

Width:

1795 mm (70.7 in)

Height:

1475 mm (58.1 in)

Wheelbase:

2625 mm (103.3 in)

Track Front:

1530 mm (60.2 in)

Track Rear:

1540 mm (60.6 in)

Wheel Bolt Pattern:

5 x 114.3 mm (5x4.5 inch)

Weights

Curb Weight:

Approximately 1505 kg (3318 lbs)

Gross Vehicle Weight Rating:

Approx. 1950 kg (4300 lbs)

🛡️ Safety Features

Ratings

NHTSA Front Crash:

5 Stars

NHTSA Side Crash:

5 Stars

NHTSA Rollover:

4 Stars

Active Features

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

Traction Control:

Vehicle Dynamics Control (VDC)

Passive Features

Airbags:

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

Seatbelts:

3-point seatbelts with pretensioners and load limiters for all seating positions

Body Structure:

High-tensile strength steel body structure

💡 Technology Features

Infotainment

Audio System:

Standard AM/FM/CD with MP3 capability, available premium audio system (e.g., JBL)

Display:

Multi-information display in instrument cluster, potentially a basic central display for audio/climate

Driver Assistance

Cruise Control:

Standard cruise control

Si Drive:

Subaru Intelligent Drive system allowing driver to select between Intelligent, Sport, and Sport Sharp modes, affecting throttle response, engine mapping, and VDC behavior.

Connectivity

Auxiliary Input:

Standard auxiliary audio input jack

Bluetooth:

Optional Bluetooth hands-free connectivity and audio streaming

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,750 miles or 6 months (severe duty) / 7,500 miles or 12 months (normal duty) - Check owner's manual for specific recommendations

Air Filter Replacement:

Every 15,000 miles or 12 months

Cabin Air Filter Replacement:

Every 15,000 miles or 12 months

Spark Plug Replacement:

Every 60,000 miles (iridium type)

Timing Belt Replacement:

N/A (EJ257 uses a timing chain, but tensioners and guides may have recommended service intervals)

Fluid Specifications

Engine Oil:

SAE 5W-30 Synthetic (API SN or higher, ILSAC GF-5 or higher) - Check specific Subaru recommendations

Coolant:

Subaru Super Coolant (Blue) or equivalent long-life, ethylene glycol-based coolant with Subaru additive package

Brake Fluid:

DOT 3 or DOT 4

Known Issues

Piston Ringland Failure:

Predominantly in earlier EJ25 engines, but can affect later models under aggressive use or poor tuning. Manual addresses proper assembly and diagnostics.

Oil Consumption:

Some EJ257 engines can exhibit higher-than-average oil consumption. Manual provides guidelines for monitoring and potential causes.

Clutch Wear:

Can be accelerated with aggressive driving. Manual details inspection and replacement procedures.

Suspension Bushings:

Can wear over time, leading to noise or handling degradation. Manual guides replacement.

Fluid Capacities

Engine Oil Capacity:

5.0 US quarts (4.7 liters) with filter change

Coolant Capacity:

Approx. 7.9 US quarts (7.5 liters)

Manual Transmission Capacity:

Approx. 2.6 US quarts (2.5 liters)

📚 Vehicle History

Brand Heritage

Motorsport Legacy:

Subaru's deep roots in World Rally Championship (WRC) and motorsports heavily influence WRX STI development

Model Evolution

Generation:

Third Generation Impreza (GR/GV/GH/GE), WRX STI variant

Design Change:

Transition to hatchback body style (GR) for some markets, continued sedan (GV) availability. Introduction of DCCD.

Production

Manufacturing Location:

Gunma Plant, Japan

Production Years:

2007-2014 (for this generation)

🏆 Awards & Recognition

Recognitions

Car And Driver 10Best:

The Impreza WRX STI, in various iterations, has frequently been named to Car and Driver's '10Best' lists, a testament to its performance.

Sport Compact Awards:

Consistently recognized by automotive publications for its performance, handling, and rally-bred capabilities.