Engine Mechanical:
Yes (including disassembly, assembly, overhaul, specifications)
Engine Management:
Yes (ECU, sensors, actuators, diagnostics, wiring diagrams)
Fuel System:
Yes (EFI, fuel pump, injectors, pressure regulation)
Cooling System:
Yes (radiator, water pump, thermostat, hoses)
Lubrication System:
Yes (oil pump, oil filter, oil passages)
Ignition System:
Yes (spark plugs, coils, timing)
Coverage:
Yes (catalytic converter, mufflers, emissions control)
Drivetrain Manual Transmission
Coverage:
Yes (gearbox, clutch, differentials)
Drivetrain Automatic Transmission
Coverage:
Yes (transmission operation, control, fluid)
Coverage:
Yes (Active AWD system operation and maintenance)
Coverage:
Yes (struts, control arms, bushings, alignment)
Coverage:
Yes (multi-link suspension, shocks, alignment)
Coverage:
Yes (power steering pump, rack and pinion, tie rods)
Coverage:
Yes (disc brakes, ABS, hydraulics, rotor/pad replacement)
Coverage:
Yes (battery, charging system, starter, lighting)
Wiring Diagrams:
Yes (comprehensive, system-specific)
Coverage:
Yes (frame, panels, doors, glass, interior trim)
Coverage:
Yes (heating, ventilation, air conditioning)
Coverage:
Yes (airbags, seatbelts)
Scheduled Maintenance:
Yes (oil changes, filter replacements, spark plugs, belts)
Troubleshooting:
Yes (diagnostic flowcharts, symptom analysis)
Component Replacement:
Yes (detailed step-by-step instructions for most components)
Engine Rebuild:
Yes (full overhaul procedures)
Transmission Overhaul:
Yes (manual and automatic)
Suspension Alignment:
Yes (specifications and adjustments)
Brake Service:
Yes (rotor/pad replacement, bleeding)
Electrical Diagnostics:
Yes (using multimeter, checking circuits)
Body Repair:
Yes (panel removal, door adjustments)
Depth:
Comprehensive (from basic maintenance to complete engine/transmission overhauls)
Detail Level:
High (includes torque specifications, clearances, repair times)
Oil Change Interval:
Every 3,750 miles or 6 months (severe duty), 7,500 miles or 12 months (normal duty)
Air Filter Replacement:
Every 15,000-30,000 miles
Spark Plug Replacement:
Every 30,000 miles (NGK plat/irid) or 100,000 miles (iridium long-life)
Engine Oil:
5W-30 (API SG or higher, ILSAC GF-2 or higher)
Coolant:
Subaru Super Coolant (Blue) or equivalent (50/50 mix with distilled water)
Transmission Fluid Manual:
Subaru Extra-S Gear Oil (75W-90 GL-5)
Transmission Fluid Automatic:
Subaru ATF HP
Head Gaskets:
While the EJ253 engine in this generation is generally considered more reliable than earlier iterations, head gasket leaks can still occur, particularly in high-mileage vehicles.
Clutch Wear:
Can be subject to accelerated wear if driven aggressively, especially with frequent AWD use in spirited driving.
Oil Leaks:
Occasional oil leaks from valve cover gaskets or oil pan seals can be found.
Wrx Specific:
Turbocharger failure and ringland issues can be present in heavily modified or poorly maintained WRX models.
