Subaru Impreza WRX STI 2014 Factory Service Repair Manual

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🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2014 Codes Chassis Code: GVB/GVF Engine Code: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Usp: Iconic turbocharged...

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SKU: 424928

Etiquetas: 2014 Car Cars Impreza WRX STI Misc Subaru

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Descripción

🏷️ Basic Information

Identification

Make:

Subaru

Model:

Impreza WRX STI

Year:

Codes

Chassis Code:

GVB/GVF

Engine Code:

EJ257

👋 Introduction

Market Position

Segment:

Performance Compact Sedan/Hatchback

Iconic turbocharged boxer engine, Symmetrical All-Wheel Drive, rally heritage

Competitive Analysis

Key Competitors 2014:

Mitsubishi Lancer Evolution, Ford Focus ST, Volkswagen Golf GTI, Honda Civic Si

Key Features Vehicle

Performance Focus:

High-performance variant of the Subaru Impreza line, engineered for spirited driving and motorsport applications.

Key Features Manual

Manual Value Proposition:

Provides Subaru technicians and owners with the definitive guide to maintain, diagnose, and repair the 2014 WRX STI, ensuring optimal performance and longevity.

📋 Manual Details

Coverage Areas

Primary Coverage:

Complete factory service and repair

Specific Areas:

Engine, Drivetrain, Suspension, Brakes, Electrical System, HVAC, Body, Chassis

Page Count

Estimated Pages:

1000+

Manual Type

Type:

Factory Service Repair Manual

Language

Language:

English

Format

Format:

Digital Download (PDF)

📖 Manual Coverage

Systems Covered

Engine Management:

ECU diagnostics, fuel injection, ignition timing, sensor data

Drivetrain:

All-Wheel Drive (AWD) system, DCCD (Driver Controlled Center Differential), transmissions (manual and automatic), differentials, axles

Suspension Steering:

Front and rear suspension components, struts, shocks, bushings, power steering system

Braking System:

Brake system diagnostics, hydraulic components, ABS, EBD, brake fluid specifications

Electrical System:

Wiring diagrams, fuses, relays, lighting, starter, alternator, battery, power windows, locks

Comfort Convenience:

HVAC system, climate control, power seats, sound system, keyless entry

Body Chassis:

Body panel removal/installation, structural components, corrosion protection

Procedures Included

Maintenance:

Scheduled maintenance, oil changes, filter replacements, fluid checks

Diagnostics:

Troubleshooting guides, symptom-based diagnostics, DTC (Diagnostic Trouble Code) interpretation

Repair Rebuild:

Engine teardown and reassembly, transmission overhaul, suspension component replacement, brake caliper rebuilding

Installation:

Component installation, accessory fitting, aftermarket part integration guidelines

Technical Depth

Depth:

Comprehensive, covering from basic fluid checks to complete engine rebuilds and advanced electrical diagnostics

Diagnostic Tools:

Information on using Subaru Select Monitor (SSM) or compatible OBD-II scanners

📊 Manual Specifications

File Format

Format Details:

High-resolution PDF, searchable text for easy navigation

Print Quality

Print Readability:

Designed for clear printing of individual pages or entire sections

Binding Type

Binding For Print:

Not applicable (digital download), but designed for spiral or binder binding if printed

Paper Type

Recommended Paper For Print:

Standard copier paper suitable for workshop use

⚙️ Engine Specifications

Primary Engine

Engine Type:

Horizontally-opposed (Boxer), Turbocharged, Intercooled, DOHC, 16-valve, 4-cylinder

Displacement:

2.5 Liters (2457 cc)

Bore X Stroke:

99.5 mm x 79.0 mm

Performance

Horsepower:

305 hp @ 6000 rpm

Torque:

290 lb-ft @ 4000 rpm

Fuel System

Injection Type:

Multi-point Fuel Injection (MPI) with Electronic Throttle Control (ETC)

Fuel Requirement:

Premium Unleaded Gasoline (91 Octane or higher recommended)

Cooling System

Cooling Type:

Pressurized liquid cooling system

Lubrication System

Oil Capacity:

5.5 US Quarts (5.2 Liters) with filter change

Oil Viscosity:

SAE 5W-30 (check owner's manual for specific climate/usage recommendations)

Engine Codes Specific

Engine Variant:

EJ257 (EJ25 - WRX STI specific variant)

🔧 Transmission

Standard

Transmission Type:

6-speed Manual Transmission (TY75)

Optional

Transmission Type:

Not available for 2014 WRX STI model year

Features

Dccd:

Driver Controlled Center Differential (DCCD) with automatic mode and manual settings

Fluid Specifications

Manual Transmission Fluid:

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

Differential Fluid Front:

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

Differential Fluid Rear:

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

📐 Dimensions

Exterior

Length:

173.8 inches (4415 mm)

Width:

70.7 inches (1795 mm)

Height:

57.7 inches (1465 mm)

Wheelbase:

103.0 inches (2615 mm)

Track Width Front:

60.0 inches (1525 mm)

Track Width Rear:

59.4 inches (1510 mm)

Ground Clearance:

5.0 inches (127 mm)

Weights

Curb Weight:

Approx. 3,373 lbs (1530 kg)

Gross Vehicle Weight Rating:

Approx. 4,585 lbs (2080 kg)

Cargo

Trunk Capacity Sedan:

11.3 cu ft (320 L)

Cargo Capacity Hatchback:

22.0 cu ft (623 L) behind rear seats, 47.7 cu ft (1350 L) with rear seats folded

🛡️ Safety Features

Ratings

NHTSA Overall Rating:

4-Star (for 2014 Impreza model, WRX STI specific may vary slightly)

IIHS Top Safety Pick:

Yes (for 2014 Impreza model)

Active Features

Traction Control:

Standard

Electronic Stability Control:

Standard (Vehicle Dynamics Control - VDC)

All Wheel Drive:

Symmetrical All-Wheel Drive (standard)

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

Passive Features

Airbags Front:

Dual-stage front airbags

Airbags Side:

Front side-impact airbags

Airbags Curtain:

Front and rear side-curtain airbags

Seatbelts:

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

💡 Technology Features

Infotainment

Head Unit:

Standard touchscreen infotainment system with CD player, USB/iPod integration, Bluetooth, and auxiliary input.

Audio System:

Available Harman Kardon premium audio system on select trims.

Driver Assistance

Cruise Control:

Standard

Tire Pressure Monitoring System:

Standard

Connectivity

Bluetooth:

Standard for hands-free calling and audio streaming

Performance Tech

Si Drive:

Subaru Intelligent Drive (SI-DRIVE) system with Intelligent (I), Sport (S), and Sport Sharp (S#) modes affecting throttle response, engine mapping, and DCCD behavior.

Dccd:

Driver Controlled Center Differential for manual adjustment of front-to-rear torque split.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,750 miles or 3 months (severe service), 7,500 miles or 6 months (normal service). Consult manual for specific conditions.

Air Filter Replacement:

Check at 15,000 miles, replace as needed. Inspect more frequently in dusty conditions.

Spark Plug Replacement:

Iridium spark plugs typically at 60,000 miles. Refer to manual for exact specifications.

Coolant Replacement:

Initial change at 7 years or 105,000 miles, then every 4 years or 45,000 miles thereafter. Use Subaru Super Coolant.

Fluid Specifications

Brake Fluid Type:

DOT 3 or DOT 4

Power Steering Fluid:

Subaru Genuine ATF or compatible Dexron III/Mercon type fluid

Known Issues

Common Wrx Sti Issues General:

Head gasket failures (less common on EJ257 than earlier EJ25s, but still a consideration), clutch wear (due to performance driving), turbocharger spool issues, oil consumption.

Maintenance Focus Areas:

Regular oil changes with correct specification oil are critical for the EJ257. Proper warm-up and cool-down procedures for the turbocharger are recommended.

📚 Vehicle History

Brand Heritage

Subaru Motorsport Link:

Subaru's long and successful history in the World Rally Championship (WRC) heavily influenced the WRX STI development.

Model Evolution

Generation 2014:

This model represents the final year of the fourth generation (GR/GV chassis) Impreza WRX STI before the introduction of the separate STI model on the 2015 chassis.

Production

Production Location:

Gunma Plant, Japan

🏆 Awards & Recognition

Recognitions

Enthusiast Following:

Consistently praised by automotive journalists and enthusiasts for its performance, handling, and rally-bred pedigree.

Ratings

Performance Comparisons:

Frequently ranked among the top performance sedans/hatchbacks in its class for its all-weather capability and driver engagement.

Certifications

Manual Accuracy:

Official Factory Documentation - Verified accuracy directly from Subaru.