Positioning:
The 2005 Subaru Impreza represented Subaru's compact car offering, known for its standard All-Wheel Drive (AWD) system and sporty WRX variant, appealing to enthusiasts and those seeking all-weather capability.
Competitors:
Honda Civic, Toyota Corolla, Mazda3, Mitsubishi Lancer, Volkswagen Golf.
Driving Dynamics:
Symmetrical All-Wheel Drive, horizontally opposed 'Boxer' engine contributing to a low center of gravity, responsive handling.
Performance Variant:
The WRX model offered significantly increased horsepower, sport-tuned suspension, and aerodynamic enhancements for rally-inspired performance.
Powertrain:
Engine mechanical, engine control systems (ECU, sensors, actuators), fuel system, exhaust system, cooling system, lubrication system, ignition system, turbocharger (WRX), AWD system, manual transmission, automatic transmission.
Chassis:
Suspension (front struts, rear multi-link), steering system (power steering), brake system (ABS, rotors, pads, calipers), wheels, tires.
Electrical:
Vehicle electrical system, charging system, starting system, lighting, instrument cluster, HVAC controls, power accessories (windows, locks, mirrors), SRS airbag system, body control module (BCM), diagnostic trouble codes (DTCs).
Body:
Body panels, doors, windows, interior trim, seats, bumpers, exterior trim, glass.
Maintenance:
Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt replacement, brake pad/rotor replacement, tire rotation.
Diagnostics:
Troubleshooting guides, symptom-based diagnostics, DTC interpretation, component testing procedures, wiring diagrams, pressure testing, scan tool usage.
Repair Rebuild:
Engine overhaul, transmission repair, clutch replacement, turbocharger assembly/disassembly, brake caliper rebuild, suspension component replacement, electrical component repair.
Installation Replacement:
Component replacement (alternator, starter, radiator, water pump), sensor replacement, body panel replacement, interior trim installation.
Depth:
Comprehensive, from basic preventative maintenance to complete engine and transmission rebuilds. Detailed electrical schematics and diagnostic trees.
Naturally Aspirated Engine:
2.5L (2457cc) EJ251/EJ253 SOHC Boxer 4-cylinder
Turbocharged Engine:
2.0L (1994cc) EJ205 DOHC Turbocharged Boxer 4-cylinder (WRX)
Na Horsepower:
165 hp @ 5600 rpm (EJ251/EJ253)
Na Torque:
166 lb-ft @ 4000 rpm (EJ251/EJ253)
Turbo Horsepower:
227 hp @ 5600 rpm (EJ205 - WRX)
Turbo Torque:
217 lb-ft @ 4000 rpm (EJ205 - WRX)
Fuel Delivery:
Multi-point fuel injection (MPFI)
Fuel Type:
Unleaded gasoline, 87 octane (91 octane recommended for WRX)
Length:
Approx. 174.5 inches (4430 mm)
Width:
Approx. 68.1 inches (1730 mm)
Height:
Approx. 56.1 inches (1425 mm)
Wheelbase:
Approx. 100.1 inches (2540 mm)
Curb Weight:
Approx. 3000-3300 lbs (1361-1497 kg), varies by model and trim
Trunk Volume:
Approx. 11.6 cubic feet (Sedan), Approx. 19.1 cubic feet (Wagon rear seats up)
NHTSA Frontal Impact:
★★★★ (4-star driver, 4-star passenger for 2005 models)
IIHS Frontal Offset:
Good
ABS:
Standard Anti-lock Braking System (ABS)
Traction Control:
Available (often linked with automatic transmission)
Airbags:
Frontal airbags, available front side-impact airbags.
Seatbelts:
3-point front and rear seatbelts, pretensioners and load limiters for front seats.
Oil Change Interval:
Every 3,750 miles or 6 months, whichever comes first, under severe driving conditions; 7,500 miles or 6 months under normal conditions (check owner's manual for specific recommendations).
Timing Belt Replacement:
Every 105,000 miles or 7 years, whichever comes first (for EJ251/EJ253 engines with timing belts). The EJ205 (WRX) also has a timing belt.
Engine Oil Type:
API SG or SH rated, SAE 5W-30 synthetic blend or full synthetic. For WRX, SAE 5W-30 full synthetic is highly recommended.
Coolant Type:
Subaru Super Coolant (blue color) or equivalent ethylene glycol-based coolant with deionized water. Mix ratio 50/50.
Transmission Fluid Manual:
API GL-5, SAE 75W-90 gear oil.
Transmission Fluid Automatic:
Subaru ATF-HP or equivalent Dexron III-H compatible fluid.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Head Gaskets:
While less prevalent than in earlier generations, some EJ25 engines can still be prone to head gasket leaks, particularly if overheated or poorly maintained. The manual details inspection and replacement procedures.
Wrx Turbo Issues:
Early EJ205 turbo models can experience turbocharger wear, cracked exhaust manifold, or oil seal leaks if not properly maintained or if subjected to hard driving without proper warm-up/cool-down cycles. The manual covers turbo diagnostics and repair.
Rear Wheel Bearings:
Rear wheel bearings can sometimes wear out prematurely, especially with aggressive driving or exposure to harsh conditions. Manual provides replacement guidance.
Heritage:
Subaru, the automotive division of Fuji Heavy Industries, has a history dating back to the mid-20th century, with a strong emphasis on engineering innovation and distinct vehicle characteristics like the boxer engine and AWD.
Generation:
The 2005 Impreza is part of the second generation (GD/GG), which debuted for the 2002 model year and received a facelift for 2004. This generation is renowned for the introduction and refinement of the WRX performance model.
Manufacturing Location:
Ota City, Gunma Prefecture, Japan.
