🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STi Year: 2007 Trim Level: WRX STi Codes Chassis Code: GDB Engine Code: EJ257 👋 Introduction Market Position Segment: Compact Sport Sedan/Wagon Usp: Performance-oriented AWD platform, rally-bred heritage, turbocharged boxer engine. Competitive Analysis Key Competitors: Mitsubishi Lancer Evolution, Ford Focus RS (later models), Volkswagen GTI (performance variants). Key Features Performance Focus: Emphasizes the driving dynamics and performance capabilities of the WRX STi. Safety Emphasis: Details on Subaru's Symmetrical All-Wheel Drive and safety systems. 📋 Manual Details Coverage Areas Primary Coverage: Operation, Maintenance, Safety Features, Basic Troubleshooting Secondary Coverage: Instrument Cluster, Entertainment, Climate, Lighting, Driver Controls, Locks, Seating, Safety Systems, Tire Care, Wheels, Driving Tips Page Count Estimated Pages: Approximately 300-400 Manual Type Type: Owner's Manual Language Language: English Format Format: Printed (Original) 📖 Manual Coverage Systems Covered Engine Management: Basic overview of engine operation, warning lights, and idle control. Infotainment: Operation of audio system, navigation (if equipped), and accessory power outlets. Climate Control: Manual and automatic climate control operation, A/C system, heater, and ventilation. Lighting: Headlight controls, fog lights, interior lighting, and exterior bulb replacement guidance. Locks Security: Keyless entry operation, alarm system, power locks, and immobilizer system. Seating Safety: Seat adjustment, seat belt operation, airbag system overview, and child seat installation guidelines. Procedures Included Basic Maintenance: Checking fluid levels (oil, coolant, brake fluid, washer fluid), tire pressure checks, and wiper blade replacement. Troubleshooting: Interpreting dashboard warning lights and indicators, basic troubleshooting steps for common issues. Tire Wheel: Information on tire pressure, changing a flat tire, and jacking points. Technical Depth Depth: Designed for the owner to understand vehicle functions, basic checks, and safety. Does not include detailed repair procedures or diagnostic codes. 📊 Manual Specifications File Format Digital Format Options: Typically available as PDF for digital purchase. Print Quality Print Quality: High-quality print, clear diagrams, and legible text for original printed versions. Binding Type Binding: Original: Perfect bound or saddle-stitched. Paper Type Paper Quality: Durable paper stock suitable for automotive environments. ⚙️ Engine Specifications Primary Engine Engine Type: 2.5L DOHC Turbocharged Subaru Boxer Engine Engine Code: EJ257 Displacement: 2457 cc Performance Horsepower: 300 hp @ 6000 rpm Torque: 290 lb-ft @ 4000 rpm Redline: 7000 rpm Fuel System Fuel Delivery: Sequential Multi-Port Fuel Injection (DOHC) Recommended Fuel: Premium Unleaded Gasoline (91 octane or higher) Turbocharger: IHI VF43 Turbocharger with Intercooler 🔧 Transmission Standard Transmission Type: 6-Speed Manual Transmission Optional Optional Transmission: N/A (Manual only for STi trim) Features Drivetrain: Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD) Center Differential: Driver Controlled Center Differential (DCCD) with Auto/Manual modes Rear Differential: Helical Limited Slip Front Differential, Viscous Coupling All-Wheel Drive Limited Slip Rear Differential 📐 Dimensions Exterior Length: 174.6 inches (Sedan) Width: 70.1 inches Height: 57.0 inches Wheelbase: 103.0 inches Weights Curb Weight: 3300-3400 lbs (approx.) 🛡️ Safety Features Ratings NHTSA Front Crash: 5-Star NHTSA Side Crash: 5-Star IIHS Front Crash: Good IIHS Side Crash: Good IIHS Rear Crash: Good Active Features AWD: Subaru Symmetrical All-Wheel Drive Brakes: Front: 4-piston Brembo, Rear: 2-piston Brembo, Ventilated Discs ABS: Anti-lock Braking System (ABS) with Electronic Brake-force Distribution (EBD) Traction Control: Advanced Traction and Stability Control (VDC - Vehicle Dynamics Control) Passive Features Airbags: Front Dual-Stage Airbags, Front Side-Impact Airbags, Side Curtain Airbags (optional/market dependent) Seatbelts: 3-point Front and Rear Seatbelts with Pretensioners and Force Limiters Child Anchors: LATCH (Lower Anchors and Tethers for Children) System 💡 Technology Features Infotainment Audio System: Standard Subaru AM/FM stereo with CD player and 6 speakers. Optional premium audio systems may have been available. Navigation: Optional factory navigation system was available on some trims. Driver Assistance Vdc: Vehicle Dynamics Control (VDC) system integrating traction and stability control. Cruise Control: Standard electronic cruise control. Connectivity Aux Input: Auxiliary audio input jack for connecting external music players. 🔧 Maintenance Service Intervals Oil Change: Every 3,750 miles or 3.75 months, whichever comes first. Engine Oil Filter Replacement: At every oil change. Air Filter Replacement: Every 15,000 miles or 15 months. Spark Plug Replacement: Every 30,000 miles. Timing Belt Replacement: Not applicable (uses timing chains). Coolant Flush: Every 30,000 miles or 30 months. Fluid Specifications Engine Oil Type: SAE 5W-30 Synthetic (API SG, SH, SJ, SL, or SM) Engine Oil Capacity: 4.8 US quarts (4.5 liters) with filter change. Coolant Type: Subaru Super Coolant (Blue) Transmission Fluid Type: API GL-5, SAE 75W-90 (Manual Transmission) Differential Fluid Type: API GL-5, SAE 75W-90 (Front and Rear) Known Issues Piston Slap: Some EJ257 engines can exhibit piston slap, particularly when cold, due to piston-to-cylinder wall clearance. This is often considered a characteristic rather than a critical failure if it disappears when warm. Head Gaskets: While not as prevalent as on some earlier EJ engines, head gasket failures can still occur. Regular coolant checks and maintenance are important. Clutch Wear: Due to the high-performance nature...