Segment:
Compact Performance Sedan/Hatchback
Target Audience:
Enthusiasts, tuners, performance-oriented drivers, rally sport fans.
Key Competitors 2013:
Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus ST.
Performance Focus:
Emphasizes the turbocharged Boxer engine, Subaru's signature Symmetrical All-Wheel Drive, and performance tuning capabilities.
Manual Utility:
Designed for DIY mechanics, professional technicians, and owners who want to understand and maintain their high-performance vehicle.
Powertrain:
Engine mechanical (EJ255/EJ257), fuel system, ignition system, exhaust system, engine control (ECU), turbocharger, intercooler, transmission (manual only for WRX/STI), clutch, drivetrain components (AWD system, differentials).
Chassis:
Suspension (front MacPherson strut, rear double wishbone), steering (power assisted), braking system (ABS, brake components), wheels and tires.
Electrical:
Battery, charging system, starting system, lighting, instruments and controls, infotainment system, power accessories, wiring diagrams, diagnostic trouble codes (DTCs).
Bodywork:
Exterior panels, interior trim, doors, windows, seats, body sealing, collision repair information.
Maintenance:
Scheduled maintenance intervals, fluid checks and changes, filter replacements, spark plug service, belt inspections.
Diagnostics And Troubleshooting:
Systematic diagnostic procedures, troubleshooting guides for common issues, interpretation of diagnostic trouble codes (DTCs), electrical testing methods.
Repair And Rebuild:
Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation of all major systems.
Specifications And Data:
Torque specifications for all fasteners, measurement specifications, tolerances, electrical resistance values, fluid capacities.
Depth:
Comprehensive, covering everything from basic fluid services to full engine and transmission rebuilds, complex electrical diagnostics, and body panel repair.
Engine Type:
Turbocharged Flat-Four (Boxer)
Displacement Wrx:
2.5 Liters (2457 cc)
Horsepower Wrx:
265 hp @ 6000 rpm
Torque Wrx:
244 lb-ft @ 4000 rpm
Engine Type:
Turbocharged Flat-Four (Boxer - EJ257 'Semi-Closed Deck')
Displacement Sti:
2.5 Liters (2457 cc)
Horsepower Sti:
305 hp @ 6000 rpm
Torque Sti:
290 lb-ft @ 4000 rpm
Injection Type:
Multi-point Fuel Injection (Sequential)
Recommended Fuel:
Premium Unleaded (91+ Octane)
ECU Type:
Subaru Select Monitor (SSM III) compatible
IIHS Ratings 2013:
Good in front-offset, side impact, rear impact, and roof strength tests.
Standard Active Safety:
Vehicle Dynamics Control (VDC), Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Brake Assist.
Standard Passive Safety:
Front dual-stage airbags, front side-impact airbags, side curtain airbags, driver's knee airbag, active front head restraints.
Head Unit Features:
Standard audio system with CD player, MP3 capability, auxiliary input. Optional navigation system available.
Standard Driver Assistance:
ABS, EBD, Brake Assist, Vehicle Dynamics Control (VDC).
Connectivity Options:
Bluetooth hands-free calling and audio streaming (on select trims), USB port.
Oil Change Interval:
Every 3,750 miles or 6 months, whichever comes first, under severe driving conditions. Typically 7,500 miles or 12 months for normal conditions, but Subaru often recommends shorter intervals for turbocharged engines.
Service Intervals Filters
Air Filter Replacement:
Check every 15,000 miles; replace as needed. Replace at 30,000 miles if dirty.
Cabin Air Filter Replacement:
Check every 15,000 miles; replace as needed. Replace at 30,000 miles if dirty.
Service Intervals Spark Plugs
Spark Plug Replacement:
Iridium spark plugs: 60,000 miles.
Engine Oil Type:
SAE 5W-30, API SN or higher, ILSAC GF-5 or higher (check manual for specific Subaru certification)
Engine Oil Capacity:
5.8 US Quarts (with filter change)
Coolant Type:
Subaru Super Coolant (Blue)
Transmission Fluid Type Manual:
Subaru Extra-S Gear Oil or equivalent (refer to manual for specific viscosity and API GL-5 rating)
Differential Fluid Type Front Rear:
SAE 75W-90, API GL-5 (Subaru Extra-S Gear Oil recommended)
Ring Land Failure:
A known potential issue in EJ25 engines (particularly modified or abused ones) where piston ring lands can fracture. Proper maintenance and avoiding aggressive driving with a cold engine are critical. The manual will detail engine inspection procedures.
Clutch Wear:
High-performance nature of the vehicle can lead to accelerated clutch wear if driven aggressively or used for frequent hard launches.
Oil Consumption:
Some EJ25 engines can exhibit higher than normal oil consumption. Regular oil level checks are crucial. The manual covers oil consumption diagnosis.
Rally Roots:
Subaru's long-standing success and association with World Rally Championship (WRC) racing, contributing to the WRX's performance DNA.
Fourth Generation Debut:
The 2013 model year represents the fourth generation of the Subaru Impreza, with the WRX and STI being performance variants derived from the standard Impreza platform. This generation saw a move towards a more refined and comfortable ride, while retaining Subaru's AWD and turbocharged prowess.
Manufacturing Location:
Japan
Previous Generation Awards:
While specific 2013 awards might be limited, the Impreza WRX/STI lineage consistently receives accolades for performance, handling, and rally-inspired driving dynamics from automotive publications.
Consumer Reports General:
Consumer Reports often notes the WRX/STI's strong performance but sometimes flags reliability concerns compared to mainstream models, underscoring the value of a comprehensive service manual.
