🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2014 Codes Chassis Code: GV/GR (Hatchback), GE (Sedan) Engine Code: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus RS Key Features Performance Orientation: Iconic turbocharged Boxer engine, Symmetrical All-Wheel Drive, performance-tuned suspension Rally Heritage: Direct lineage from Subaru's successful WRC (World Rally Championship) program Target Audience Enthusiast Focus: Performance driving enthusiasts, DIY mechanics, rally fans 📋 Manual Details Coverage Areas Primary Regions: Global (North America, Europe, Asia, Australia) Page Count Total Pages: 3377 Manual Type Type: Workshop Service and Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine (EJ257), Transmission (6-speed manual), Drivetrain (Symmetrical All-Wheel Drive), Exhaust System Chassis: Suspension (front MacPherson strut, rear double wishbone), Brakes (ventilated discs front/rear, Brembo calipers), Steering (power assisted rack and pinion) Electrical: Engine Control Module (ECM), Body Control Module (BCM), Lighting, Instrumentation, Audio System, Power Accessories, Wiring Diagrams Body: Exterior body panels, Interior trim, HVAC system, Safety restraints (airbags, seatbelts) Procedures Included Maintenance: Scheduled maintenance, Oil changes, Filter replacements, Spark plug replacement, Coolant flush Diagnostics: Troubleshooting guides, Diagnostic Trouble Codes (DTCs), Circuit testing, Component testing Repair: Engine overhaul, Transmission rebuild, Brake caliper replacement, Suspension component replacement, Electrical component repair Calibration Adjustment: Wheel alignment, Throttle body cleaning and relearn, Clutch adjustment Technical Depth Level Of Detail: Comprehensive, from basic maintenance to complete engine and transmission rebuilds Diagnostic Tools: Includes information for using Subaru Select Monitor (SSM) or equivalent OBD-II diagnostic tools 📊 Manual Specifications File Format Digital Format: PDF Print Quality Resolution: High-resolution, suitable for printing Binding Type Physical Equivalent: Ring-bound or spiral-bound for lay-flat use Paper Type Physical Equivalent: Durable, semi-gloss paper suitable for workshop environments ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally Opposed (Boxer) Turbocharged 4-Cylinder Displacement: 2.5 Liters (2457 cc) Performance Horsepower: 305 hp @ 6000 RPM Torque: 290 lb-ft @ 4000 RPM Fuel System Fuel Delivery: Multi-Point Fuel Injection (MPFI) with Turbocharger Recommended Fuel: Premium Unleaded Gasoline (91 Octane or higher) Cooling System Coolant Type: Subaru Super Coolant (Blue) Lubrication System Oil Type: SAE 0W-30 Synthetic (API SN or higher) Oil Capacity: 5.8 US Quarts (5.5 Liters) with filter 🔧 Transmission Standard Type: 6-Speed Manual Transmission (TY856WR1MA) Optional Type: None for WRX STI trim in 2014 Features Drivetrain System: Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) Fluid Specifications Manual Transmission Fluid: Subaru Gear Oil Extra LPS 75W-90 GL-5 Front Differential Fluid: Subaru Gear Oil Extra LPS 75W-90 GL-5 Rear Differential Fluid: Subaru Gear Oil Extra LPS 75W-90 GL-5 📐 Dimensions Exterior Length: 173.8 inches (4415 mm) - Sedan Width: 70.1 inches (1780 mm) Height: 57.7 inches (1465 mm) - Sedan Wheelbase: 103.2 inches (2620 mm) Weights Curb Weight: 3373 lbs (1530 kg) Gross Vehicle Weight Rating: 4652 lbs (2109 kg) 🛡️ Safety Features Ratings NHTSA Overall Rating: 4/5 Stars (as of original testing, may vary by configuration) Active Features Traction Control: Yes, with multiple modes Electronic Stability Control: Yes (Vehicle Dynamics Control - VDC) Passive Features Airbags: Frontal, Side-Curtain, Front Side Impact, Driver's Knee Seatbelts: 3-point ELR front and rear with pretensioners and force limiters 💡 Technology Features Infotainment Head Unit: Standard touchscreen infotainment system with CD/MP3 player, Bluetooth, and USB connectivity. Audio System: Available premium audio system with 9 speakers. Driver Assistance Dccd: Driver Controlled Center Differential for adjustable torque split between front and rear axles. Si Drive: Subaru Intelligent Drive system with Sport (S), Sport Sharp (S#), and Intelligent (I) modes, altering throttle response, engine mapping, and AWD behavior. Connectivity Bluetooth: Standard for hands-free calling and audio streaming. Auxiliary Input: Standard 3.5mm auxiliary input jack. 🔧 Maintenance Service Intervals Oil Change: Every 3,750 miles or 6 months (severe driving) or 7,500 miles or 12 months (normal driving) Air Filter Replacement: Every 15,000 miles Spark Plug Replacement: Every 30,000 miles (NGK SILFR6A) Timing Belt Replacement: Not applicable (uses a timing chain) Coolant Replacement: First replacement at 60,000 miles or 5 years, then every 30,000 miles or 2 years Fluid Specifications Brake Fluid: DOT 3 or DOT 4 Power Steering Fluid: Subaru All-Season PSF or equivalent DEXRON III ATF Known Issues Piston Ring Land Cracking: A known concern in EJ25 engines, especially if modified or driven aggressively without proper maintenance; requires engine rebuild if severe. Clutch Wear: Can be accelerated by aggressive driving and frequent use of the DCCD. Intercooler Hose Leaks: Leaking intercooler hoses can affect boost pressure and performance. 📚 Vehicle History Brand Heritage Motorsport Legacy: Subaru's long and successful history in rallying, notably with the Impreza platform. Model Evolution Gd To Gr Gh Transition: The 2014 model represents the latter part of the 'third generation' (third generation hatchback GR/GV, sedan GE) of the Impreza WRX STI, preceding the significantly redesigned 'VA' generation. Production Manufacturing...