🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2013 Codes Chassis Code: GVB (Hatchback) Engine Code Primary: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Target Audience: Enthusiasts, Owners seeking DIY maintenance, Independent Repair Shops Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Ford Focus RS, Volkswagen Golf GTI/R Key Features Performance Focus: All-Wheel Drive, Turbocharged Engine, Rally-Bred Pedigree Manual Value Proposition: Empowers owners and technicians with in-depth knowledge for optimal performance and longevity 📋 Manual Details Coverage Areas Primary Focus: Repair, Overhaul, Maintenance, Diagnostics Secondary Focus: Troubleshooting, Wiring Diagrams, Specifications Page Count Estimated Pages: 1500+ Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine, Turbocharger, Intercooler, Drivetrain, Transmission, Differentials (Front, Center, Rear) Chassis: Suspension (Front MacPherson Strut, Rear Double Wishbone), Steering System, Brakes (Front Brembo 4-Piston, Rear Brembo 2-Piston), Wheels & Tires Electrical: Engine Control Module (ECM), Body Control Module (BCM), Lighting, Instrumentation, Audio System, SRS Airbag System, ABS/VDC System, Power Accessories Body: Exterior Body Panels, Interior Trim, Seating, Glass, Wiper System, HVAC System Procedures Included Maintenance: Oil Changes, Filter Replacements, Fluid Checks & Replacements, Spark Plug Service, Belt Inspections & Replacements Repair: Engine Overhaul, Transmission Rebuild, Suspension Component Replacement, Brake Pad/Rotor Replacement, Electrical Component Diagnosis & Replacement Diagnostics: Fault Code Reading & Interpretation, Component Testing, Performance Diagnostics, Wiring Harness Troubleshooting Technical Depth Depth Level: Comprehensive (from basic maintenance to full engine and transmission rebuilds) Diagnostic Tools Required: OBD-II Scanner, Multimeter, Specialized Subaru Diagnostic Software (e.g., Subaru Select Monitor - SSM, though specific version not listed) 📊 Manual Specifications File Format File Type: Searchable PDF Printability: Printable Pages Print Quality Image Resolution: High-resolution scans of original factory documentation Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Type: 2.5L Turbocharged Boxer 4-Cylinder (EJ257) Performance Horsepower Est: 305 hp @ 6000 rpm Torque Est: 290 lb-ft @ 4000 rpm Fuel System Induction: Multi-point Fuel Injection with Turbocharging and Intercooling Engine Management ECU Type: Denso ECU (specific part number varies) Cooling System Coolant Type: Subaru Super Coolant (Blue) or equivalent G12/G13 type coolant Lubrication Oil Type: SAE 0W-30 Synthetic (preferred), SAE 5W-30 Synthetic acceptable Oil Capacity With Filter: 5.8 US Quarts (5.5 Liters) Engine Codes Specific Engine Variant: EJ257 (JDM/EDM variants may differ slightly in tune) 🔧 Transmission Standard Type: 6-Speed Manual (TY757) Optional Type: N/A (Manual transmission was standard for WRX STI in most markets) Features AWD System: Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) Fluid Specifications Manual Transmission Fluid: Subaru Extra S Gear Oil (75W-90 GL-5) or equivalent Rear Differential Fluid: Subaru Extra S Gear Oil (75W-90 GL-5) or equivalent Gear Ratios Example Final Drive Ratio: 3.55:1 📐 Dimensions Exterior Length: 179.5 in (4560 mm) Width: 70.9 in (1800 mm) Height: 58.1 in (1475 mm) Wheelbase: 104.0 in (2640 mm) Weights Curb Weight Est: 3373 - 3417 lbs (1530 - 1550 kg) depending on trim/options Towing Capacity: Not Recommended Cargo Cargo Volume Hatchback: 22.1 cu ft (626 Liters) behind rear seats 🛡️ Safety Features Ratings NHTSA Overall Rating 2013: 4/5 Stars (Specific model may vary, general Impreza rating) Active Features Stability Control: Vehicle Dynamics Control (VDC) Traction Control: Active Traction Control Braking System: Anti-lock Braking System (ABS) with Electronic Brake-force Distribution (EBD) and Brake Assist Passive Features Airbags: Front, Side Curtain, Driver's Knee Airbags Seatbelts: 3-point ELR front and rear seatbelts with pre-tensioners and force limiters Chassis Design Frame Construction: Ring-shaped Reinforcement Frame 💡 Technology Features Infotainment Head Unit: Standard Subaru AM/FM/CD/MP3/WMA player with auxiliary input, USB port, Bluetooth connectivity, and LCD display. Navigation Option: Optional touchscreen navigation system available on some trims. Driver Assistance Dccd System: Driver Controlled Center Differential (DCCD) allows manual adjustment of center differential lock-up for varying traction conditions. Vdc System: Vehicle Dynamics Control integrates ABS, traction control, and stability control for enhanced handling and safety. Connectivity Bluetooth: Bluetooth hands-free calling and audio streaming capability Instrumentation Gauge Cluster: Performance-oriented gauge cluster with multi-function display, including boost gauge. 🔧 Maintenance Service Intervals Oil And Filter Change: Every 3,750 miles (6,000 km) or 6 months (severe duty) / 7,500 miles (12,000 km) or 12 months (normal duty) Air Filter Replacement: Every 15,000 miles (24,000 km) or 12 months Cabin Air Filter Replacement: Every 15,000 miles (24,000 km) or 12 months Spark Plug Replacement: Every 60,000 miles (96,000 km) Transmission Fluid Change: Every 30,000 miles (48,000 km) or 24 months (for manual transmission) Fluid Specifications Coolant Capacity: Approx. 7.0 US Quarts (6.6 Liters) Brake Fluid Type: DOT 3 or DOT 4 Known Issues Engine Knock Control: Premature piston ring wear, piston land failure (particularly on piston #3) due to detonation/pre-ignition, especially when modified or poorly maintained. Clutch Wear: Early model WRX STIs were known for clutch issues, though 2013 models were generally improved. Aggressive...