ECU (Engine Control Unit) with O2 sensors, knock sensors, and MAF/MAP sensors
🔧 Transmission
Standard
Manual Transmission:
5-speed Manual (TY754 for NA, TY755 for Turbo/H6 models)
Optional
Automatic Transmission:
4-speed Automatic (4EAT-CF) with AWD coupling
Features
AWD System Type:
Symmetrical All-Wheel Drive with viscous coupling center differential (manual) or electronically controlled clutch pack (automatic)
Manual Transmission Fluid:
Subaru Extra-S Gear Oil (API GL-5, SAE 75W-90) or equivalent
Automatic Transmission Fluid:
Subaru ATF HP (High Performance) or equivalent
📐 Dimensions
Exterior
Length Sedan:
187.4 inches (4760 mm)
Length Wagon:
188.8 inches (4800 mm)
Width:
69.1 inches (1755 mm)
Height Sedan:
57.7 inches (1465 mm)
Height Wagon:
56.7 inches (1440 mm)
Wheelbase:
104.0 inches (2640 mm)
Wheel Size:
16-inch, 17-inch, or 18-inch alloy wheels
Tire Size Examples:
205/55R16, 215/45R17, 225/40R18
Weights
Curb Weight Range:
3180-3550 lbs (approx.)
Wheel Bolt Pattern:
5x100mm
Lug Nut Torque:
80 ft-lbs (108 Nm)
🛡️ Safety Features
Ratings
NHTSA Front Impact:
5-Star (Driver and Passenger)
NHTSA Side Impact:
5-Star (Front), 4-Star (Rear)
Active Features
ABS:
Standard Anti-lock Braking System
Traction Control:
Available Traction Control System (TCS) on some models
Electronic Stability:
Vehicle Dynamics Control (VDC) available on higher trims or as an option.
Passive Features
Airbags:
Front dual-stage airbags, front side-impact airbags, side curtain airbags (optional on some models)
Seatbelts:
Three-point height-adjustable front seatbelts with pretensioners, three-point rear seatbelts
💡 Technology Features
Infotainment
Audio System:
Standard AM/FM/CD audio systems, optional premium sound, satellite radio prep.
Navigation:
Optional factory navigation system available on select models.
Driver Assistance
Cruise Control:
Standard electronic cruise control.
Keyless Entry:
Standard or optional keyless entry and immobilizer system.
Connectivity
Auxiliary Input:
Some models may feature an auxiliary audio input jack.
🔧 Maintenance
Service Intervals
Oil Change:
Every 3,750 miles or 3 months, or 7,500 miles/6 months under severe driving conditions or with synthetic oil.
Engine Air Filter:
Replace every 15,000 miles or 12 months.
Cabin Air Filter:
Replace every 15,000 miles or 12 months.
Spark Plugs 2 5I:
Replace every 105,000 miles (if using iridium spark plugs).
Spark Plugs 3 0R:
Replace every 60,000 miles (if using platinum spark plugs).
Timing Belt:
This generation uses a timing *chain* for all engines, which is generally considered maintenance-free but requires inspection for wear or noise.
Coolant Flush:
Replace coolant every 30,000 miles or 24 months.
Fluid Specifications
Engine Oil:
SAE 5W-30, API SM or SN certified (check owner's manual for exact specs and capacity).
Brake Fluid:
DOT 3 or DOT 4.
Known Issues
Head Gasket:
While less common than on earlier generations, Subaru EJ25 engines can still experience head gasket leaks. The manual will detail inspection and replacement procedures.
Turbocharger Issues Gt Xt:
Turbocharger lubrication issues can arise if oil is not changed regularly. The manual covers turbo inspection and maintenance.
Suspension Wear:
Bushings and ball joints can wear over time, leading to noise and alignment issues. The manual provides replacement and alignment specifications.
Automatic Transmission Performance:
Some reports of slipping or delayed engagement on older automatic transmissions. Regular fluid changes are critical.
📚 Vehicle History
Brand Heritage
Brand Legacy:
Subaru, a division of Fuji Heavy Industries, has a long history in aviation and automotive manufacturing, known for its horizontally opposed 'Boxer' engines and Symmetrical All-Wheel Drive systems.
Model Evolution
Generation:
Fourth Generation (BP/BL), introduced for the 2005 model year, replacing the third-generation BG/BH Legacy.
Design Philosophy:
A significant redesign with a more aerodynamic and sculpted exterior, improved interior refinement, and a focus on a more global appeal.
Production
Manufacturing Location:
Subaru's manufacturing plants, primarily in Japan.
🏆 Awards & Recognition
Recognitions
Iiihs Top Safety Pick:
The 2005 Subaru Legacy received 'Good' ratings in IIHS front and side impact tests, often qualifying it for safety accolades in its class for its time.