Unleaded gasoline (87 octane recommended for NA, 91 octane recommended for Turbo).
Performance
Compression Ratio Base:
10.7:1
Compression Ratio Turbo:
8.4:1
Bore X Stroke Base:
92.0 mm x 91.0 mm
🔧 Transmission
Standard
Transmission Type:
5-speed manual transmission (for some Legacy variants) or 4-speed automatic transmission.
Optional
Transmission Type Optional:
5-speed automatic transmission (with Sportshift/manual mode) for some trims, especially with the 3.0L engine.
Features
AWD Integration:
Integrated with Subaru's Symmetrical All-Wheel Drive system.
Automatic Transmission Fluid:
Subaru ATF HP (or equivalent specification).
Manual Transmission Fluid:
Subaru Extra S (or GL-5 75W-90 specification).
📐 Dimensions
Exterior
Length Outback:
Approx. 189.4 inches (4810 mm)
Width Outback:
Approx. 70.5 inches (1790 mm)
Height Outback:
Approx. 61.1 inches (1550 mm)
Wheelbase:
Approx. 104.3 inches (2650 mm)
Ground Clearance Outback:
8.7 inches (221 mm)
Cargo
Cargo Volume Outback Behind Rear Seat:
Approx. 33.5 cu ft (948 L)
Cargo Volume Outback Max:
Approx. 71.4 cu ft (2022 L) with rear seats folded.
Weights
Curb Weight Base:
Approx. 3,400 - 3,600 lbs (1542 - 1633 kg), varies by trim and drivetrain.
🛡️ Safety Features
Ratings
IIHS Crash Test Rating 2006:
Good in front and side impact tests (IIHS).
NHTSA Crash Test Rating 2006:
Generally achieved 4 or 5 stars in frontal and side impact tests (NHTSA), specific ratings may vary by year and configuration.
Active Features
ABS:
Standard Anti-lock Braking System (ABS).
Ebd:
Standard Electronic Brake-force Distribution (EBD).
Passive Features
Airbags:
Frontal airbags, front side-impact airbags, side curtain airbags (standard on many Outback trims).
Seatbelts:
Three-point seatbelts for all occupants, front seatbelt pretensioners.
💡 Technology Features
Infotainment
Audio System:
Factory-installed AM/FM stereo with CD player, optional satellite radio, and premium audio systems with subwoofer.
Navigation System:
Optional factory-installed GPS navigation system, typically integrated into the dashboard display.
Driver Assistance
Cruise Control:
Standard cruise control, often with steering wheel mounted buttons.
Tire Pressure Monitoring System:
TPMS sensors in wheels, with warning light on dashboard.
Connectivity
Auxiliary Input:
Optional auxiliary audio input jack for connecting external media devices.
Keyless Entry:
Standard on most trims, often includes remote keyless entry and alarm system.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 3,750 miles (severe conditions) or 7,500 miles (normal conditions), or 6 months, whichever comes first.
Engine Oil Filter Replacement:
Replace with every oil change. Common part numbers include 15208AA031, 15208AA021.
Air Filter Replacement:
Every 30,000 miles or as needed based on driving conditions. Part number: 16546AA020.
Spark Plug Replacement:
NGK Iridium: 60,000 miles for EJ253, 30,000 miles for EJ255 (check manual for specific type). Part number examples: SILFR6A, PFR7B (for turbo).
Coolant Flush:
Every 30,000 miles or 24 months. Use Subaru Super Coolant or equivalent P-HOAT coolant.
Transmission Fluid Change Auto:
Every 30,000 miles for severe conditions, 60,000 miles for normal. Capacity: Approx. 7.8 quarts (7.4 L).
Transmission Fluid Change Manual:
Every 30,000-60,000 miles. Capacity: Approx. 2.5 quarts (2.4 L).
Brake Fluid Flush:
Every 30,000 miles or 24 months. Use DOT 3 or DOT 4 brake fluid.
Differential Fluid Change Front Rear:
Every 30,000 miles. Front capacity: Approx. 1.1 quarts (1.0 L). Rear capacity: Approx. 1.3 quarts (1.2 L). Use GL-5 75W-90.
Fluid Specifications
Engine Oil Type:
SAE 5W-30 (API SG, SH, or SJ certified).
Engine Oil Capacity:
4.8 US quarts (4.5 L) with filter for 2.5L; 5.1 US quarts (4.8 L) with filter for 3.0L.
Coolant Type:
Subaru Super Coolant (Blue) or equivalent P-HOAT coolant.
Known Issues
Head Gasket Failure:
While less prone than earlier Subaru generations, head gasket leaks can still occur, particularly on the EJ253. The manual will detail inspection and replacement procedures.
Oxygen Sensor Failure:
Premature failure of upstream O2 sensors can affect fuel economy and emissions. Manual covers diagnosis and replacement.
Catalytic Converter Issues:
Can become clogged over time, leading to performance loss. Manual assists in diagnosis.
Automatic Transmission Longevity:
Regular fluid changes are crucial for the longevity of the 4-speed automatic. Manual provides correct fluid types and capacities.
📚 Vehicle History
Brand Heritage
Subaru History:
Subaru, a division of Fuji Heavy Industries, has a long history of producing robust, reliable vehicles with a focus on All-Wheel Drive technology since the 1970s.
Model Evolution
Legacy History:
The Subaru Legacy was introduced in 1989 as a replacement for the Leone. The Outback variant, originally an Outback Sport trim of the Legacy wagon, became a distinct model in 1995, creating the crossover segment.
Third Gen Legacy Outback:
The 2005-2009 generation (BP/BL chassis) represented the third generation for the Legacy and second generation for the dedicated Outback model. It featured a more refined design, improved interiors, and enhanced AWD systems.
Production
Manufacturing Location:
Gunma Plant, Japan.
🏆 Awards & Recognition
Recognitions
IIHS Top Safety Pick:
Often recognized by the Insurance Institute for Highway Safety (IIHS) for good crash test performance.
Consumer Reports Ratings:
Generally received good to excellent ratings from consumer publications for reliability and performance in previous years, though 2006 specific ratings should be checked.