Subaru Impreza WRX STI 2015 WSM Service Manual Repair

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2015 Product Type: Service Repair Manual Codes Chassis Code: VA 👋 Introduction Market Position Positioning: Performance compact sedan, rally-bred...

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标签: 2015 Car Cars Impreza WRX STI Misc Subaru

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Description

🏷️ Basic Information

Identification

Make:

Subaru

Model:

Impreza WRX STI

Year:

Product Type:

Service Repair Manual

Codes

Chassis Code:

👋 Introduction

Market Position

Positioning:

Performance compact sedan, rally-bred heritage

Target Audience:

Enthusiast drivers, DIY mechanics, performance tuning community

Competitive Analysis

Competitors:

Mitsubishi Lancer Evolution, Volkswagen Golf GTI/R, Ford Focus RS, Honda Civic Type R

Key Features

Performance Focus:

Engineered for performance driving, handling, and power

AWD System:

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

Braking System:

High-performance Brembo brakes for superior stopping power

Suspension Tuning:

STI-specific sport-tuned suspension for enhanced road holding

📋 Manual Details

Coverage Areas

General Coverage:

Comprehensive service and repair information

Specific Coverage:

All mechanical, electrical, chassis, body, and diagnostic systems

Page Count

Estimated Page Count:

Thousands of pages (typical for WSM)

Manual Type

Type:

Factory Workshop Service Manual (WSM)

Language

Language:

English

Format

Format:

Digital Download (likely PDF)

📖 Manual Coverage

Systems Covered

Engine:

2.5L Turbocharged Boxer Engine (EJ257)

Transmission:

6-Speed Manual Transmission (TY85)

Drivetrain:

Symmetrical All-Wheel Drive (AWD) System

Suspension:

Front MacPherson Struts, Rear Double Wishbone, STI-specific tuning

Brakes:

Brembo Performance Braking System (Front 6-piston, Rear 2-piston calipers)

Steering:

Electric Power Steering (EPS)

Electrical:

Full Electrical Schematics, ECU Diagnosis, Sensor Functions

Body:

Body Panel Repair, Interior Trim, Glass Replacement

HVAC:

Heating, Ventilation, and Air Conditioning System

Safety Systems:

Airbag Systems, ABS, Traction Control, Stability Control

Procedures Included

Maintenance:

Oil changes, filter replacements, fluid checks and flushes, spark plug replacement

Engine Repair:

Top-end rebuilds, bottom-end rebuilds, timing belt/chain service, turbocharger diagnostics and repair

Transmission Repair:

Clutch replacement, gearbox overhaul, driveline component repair

Brake Service:

Pad and rotor replacement, caliper service, bleeding procedures

Suspension Work:

Component replacement, alignment procedures, damper and spring service

Diagnostics:

OBD-II diagnostic codes, fault tracing, component testing

Electrical Troubleshooting:

Wiring harness repair, component testing, circuit diagnosis

Body Repair:

Panel alignment, dent repair, rust mitigation

Wiring Diagrams:

Detailed electrical schematics for all systems

Technical Data:

Torque specifications, clearances, specifications for all components

Technical Depth

Depth:

Deep, in-depth professional-level repair and diagnostics

Coverage Level:

Complete rebuilds to minor adjustments

📊 Manual Specifications

File Format

Format:

Searchability:

Searchable text content

Printability:

Printable pages

Print Quality

Quality:

High-resolution images and diagrams

Binding Type

Binding:

N/A (Digital)

Paper Type

Paper:

N/A (Digital)

⚙️ Engine Specifications

Primary Engine

Engine Code:

EJ257

Engine Type:

2.5L DOHC turbocharged horizontally-opposed (Boxer) 4-cylinder

Bore X Stroke:

99.5 mm x 79.0 mm

Compression Ratio:

8.2:1

Performance

Horsepower:

305 hp @ 6000 rpm

Torque:

290 lb-ft @ 4000 rpm

Fuel System

Fuel Delivery:

Sequential multi-port fuel injection with side-feed injectors

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

Engine Management

ECU Type:

Engine Control Unit (ECU) with programmable parameters

🔧 Transmission

Standard

Transmission Type:

6-Speed Manual Transmission

Transmission Code:

Features

Dccd:

Driver-Controlled Center Differential (DCCD) for adjustable torque split

Differentials:

Front Helical Limited Slip Differential (LSD), Rear Mechanical Limited Slip Differential (LSD)

Fluid Specifications

Manual Transmission Fluid:

Subaru Extra S API GL-5 75W-90 (or equivalent)

📐 Dimensions

Exterior

Length:

179.4 inches (4557 mm)

Width:

70.5 inches (1791 mm)

Height:

57.7 inches (1466 mm)

Wheelbase:

103.2 inches (2621 mm)

Ground Clearance:

5.0 inches (127 mm)

Weights

Curb Weight:

Approximately 3,373 lbs (1530 kg)

Gross Vehicle Weight Rating:

4,520 lbs (2050 kg)

Towing Capacity:

Not Recommended

🛡️ Safety Features

Ratings

NHTSA Rating:

5-Star Overall Safety Rating (when equipped with EyeSight)

IIHS Rating:

Top Safety Pick+

Active Features

Traction Control:

Subaru Vehicle Dynamics Control (VDC) with Track Mode

4-wheel Anti-lock Braking System (ABS)

Brake Bias:

Electronic Brake-force Distribution (EBD)

Driver Assistance Options:

Optional EyeSight Driver Assist Technology (includes Adaptive Cruise Control, Pre-Collision Braking, Lane Departure Warning)

Passive Features

Airbags:

Advanced front airbags, front side-impact airbags, curtain airbags, driver's knee airbag

Seatbelts:

3-point seatbelts with pretensioners and load limiters, LATCH child seat system

Body Structure:

Ring-shaped reinforcement frame and front crumple zone

💡 Technology Features

Infotainment

Infotainment System:

7-inch touchscreen infotainment system with smartphone integration (e.g., Apple CarPlay, Android Auto in later models, but check specific build)

Audio System:

Harman Kardon premium audio system (optional)

Driver Assistance

Eyesight System:

Optional EyeSight suite for enhanced safety and convenience

Backup Camera:

Standard rearview camera

Connectivity

Bluetooth:

Bluetooth hands-free connectivity

Usb Ports:

USB charging and data ports

Performance Tech

Si Drive:

SI-DRIVE (Subaru Intelligent Drive) system with Intelligent, Sport, and Sport Sharp modes

Driver Modes:

Adjustable engine response, steering feel, and AWD behavior

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,750 miles or 6 months (severe driving conditions), 7,500 miles or 12 months (normal conditions)

Air Filter Replacement:

Every 15,000 miles

Cabin Air Filter Replacement:

Every 15,000 miles

Spark Plug Replacement:

Every 30,000 miles (NGK Iridium recommended)

Coolant Flush:

Every 30,000 miles or 24 months

Transmission Fluid Change:

Every 30,000 miles (manual transmission)

Fluid Specifications

Engine Oil Capacity:

5.3 US quarts (5.0 L) with filter (5W-30 synthetic recommended)

Coolant Type:

Subaru Super Coolant (Blue)

Brake Fluid Type:

DOT 3 or DOT 4

Known Issues

Piston Ring Wear:

Potential for premature oil consumption and bore scoring in some EJ25 engines (especially earlier versions, but still a consideration for enthusiasts)

Clutch Wear:

Can be accelerated by aggressive driving or performance modifications

Oil Leaks:

Occasional leaks from valve cover gaskets or oil cooler seals

Dccd Actuator:

Rare instances of DCCD actuator failures, requiring specialized diagnosis and repair

📚 Vehicle History

Brand Heritage

Rally Connection:

Direct lineage from Subaru's World Rally Championship (WRC) success

Model Evolution

Generation:

Fifth Generation Impreza (VA chassis for WRX STI)

Subaru Wrx Sti History:

Long-standing reputation for performance and rally prowess since the early 1990s

Production

Manufacturing Location:

Japan

🏆 Awards & Recognition

Recognitions

Performance Car Awards:

Consistently recognized in automotive media for performance and handling

Rally Heritage Awards:

Acknowledged for its motorsport DNA and capabilities