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Subaru

Subaru Impreza WRX STI 2006 Service Repair Manual

Subaru Impreza WRX STI 2006 Service Repair Manual

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$16.99
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Vehicle data plateRef 89156
Brand
Subaru
Vehicle
Cars
Models covered
Impreza WRX STI, Misc
Years
2006
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

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This manual covers the 2006 Subaru Impreza WRX STI, a performance-oriented compact sedan and wagon renowned for its rally-bred engineering. Built on the third generation (GD) chassis, this model is distinguished by its turbocharged 2.5L Boxer engine, delivering 300 horsepower and 290 lb-ft of torque, coupled with a standard 6-speed manual transmission and all-wheel drive system featuring a Driver Controlled Center Differential (DCCD). Its iconic status is cemented by its strong connection to World Rally Championship success and consistent praise for its exceptional handling, acceleration, and all-weather capability, making it a highly sought-after vehicle for performance driving enthusiasts. This comprehensive factory service manual provides detailed guidance for the maintenance, repair, and diagnostics of the 2006 Subaru Impreza WRX STI. Covering mechanical and electrical systems, bodywork, and crucial technical specifications, the manual includes procedures for engine assembly, transmission service, brake and suspension systems, and electrical component troubleshooting. With over 1500 pages of information, it details scheduled maintenance, component disassembly and reassembly, diagnostic trouble codes, and specific fluid requirements, serving as an indispensable resource for owners, mechanics, and technicians to ensure the optimal performance and longevity of their vehicle.
🏷️ Basic Information
Identification
Make:
Subaru
Model:
Impreza WRX STI
Year:
2006
Model Code:
GDB
Generation
Generation Name:
Third Generation (GD)
Generation Years:
2000-2007
Codes
Chassis Code:
GDB-F (specific to 2006-2007 model updates)
👋 Introduction
Market Position
Segment:
Performance Compact Sedan/Wagon
Reputation:
Iconic rally-bred performance car, known for all-wheel drive and turbocharged power
Competitive Analysis
Key Competitors:
Mitsubishi Lancer Evolution, Ford Focus RS, Volkswagen Golf GTI
Key Features
Performance Focus:
Engineered for performance driving, rallying heritage
AWD System:
Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD)
Engine Type:
Turbocharged Boxer engine
Transmission:
Standard 6-speed manual transmission
📋 Manual Details
Coverage Areas
Primary Coverage:
Mechanical, Electrical, Body, Maintenance, Diagnostics
Secondary Coverage:
Troubleshooting, Wiring Diagrams, Specifications
Page Count
Estimated Page Count:
1500+
Manual Type
Type:
Factory Service Manual / Repair Manual
Language
Language:
English
Format
Format:
PDF Download
📖 Manual Coverage
Systems Covered
Engine Mechanical:
Engine assembly, cylinder head, block, lubrication system, cooling system, timing system
Engine Performance:
Turbocharger system, intercooler, fuel injection, ignition system, emissions control
Transmission:
6-speed manual transmission (TY856WB1AA), clutch system, drivetrain (front/rear differentials, DCCD)
Brakes:
Front and rear brake systems, ABS, parking brake
Suspension:
Front and rear suspension components, alignment specifications
Steering:
Power steering system, steering column
Electrical:
Battery, charging system, starting system, lighting, instruments, accessories, body electrical control units
Body:
Body structure, exterior panels, interior trim, doors, glass, HVAC system
Chassis Electrical:
Wiring diagrams, connector pinouts, fuse and relay locations
Procedures Included
Maintenance:
Scheduled maintenance, fluid changes, filter replacements, lubrication points
Repair:
Component disassembly and reassembly, component testing and replacement
Diagnostics:
Troubleshooting charts, symptom analysis, diagnostic trouble codes (DTCs)
Adjustments:
Alignment, clutch, brake adjustments
Installation:
Major component replacement procedures
Technical Depth
Depth:
Comprehensive; covers basic to advanced repairs and diagnostics
Diagnostic Tools:
Detailed diagnostic procedures, including use of Subaru Select Monitor (SSM) if applicable
📊 Manual Specifications
File Format
File Type:
PDF
Searchable:
Yes (typically)
Print Quality
Quality:
High-resolution scans of original factory documents
Binding Type
Binding:
N/A (Digital Download)
Paper Type
Paper:
N/A (Digital Download)
⚙️ Engine Specifications
Primary Engine
Engine Code:
EJ257
Engine Type:
2.5L DOHC Turbocharged Boxer-4
Bore X Stroke:
99.5 mm x 79.0 mm
Compression Ratio:
8.0:1
Displacement:
2457 cc
Performance
Horsepower:
300 hp @ 6000 rpm
Torque:
290 lb-ft @ 4000 rpm
Fuel System
Fuel Delivery:
Multi-point Fuel Injection (MPI)
Recommended Fuel:
Premium Unleaded Gasoline (91+ Octane)
Fuel Tank Capacity:
15.1 gallons (57 liters)
🔧 Transmission
Standard
Transmission Type:
6-speed Manual
Transmission Model:
TY856WB1AA
Optional
Optional Transmission:
N/A (STI models exclusively manual)
Features
AWD System:
Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD)
Dccd Modes:
Manual and Automatic modes for center differential lockup
Rear Differential:
Viscous-coupling Limited-Slip Differential (VLSD)
📐 Dimensions
Exterior
Length:
173.4 inches (4404 mm)
Width:
69.7 inches (1770 mm)
Height:
57.7 inches (1465 mm)
Wheelbase:
103.1 inches (2619 mm)
Ground Clearance:
5.5 inches (140 mm)
Weights
Curb Weight:
Approx. 3285 lbs (1490 kg)
Gross Vehicle Weight Rating:
Approx. 4355 lbs (1975 kg)
Cargo
Trunk Capacity:
11.3 cu ft (320 liters) (Sedan), Varies by model (Wagon)
🛡️ Safety Features
Ratings
NHTSA Front Impact:
Not rated or Not Applicable for this specific variant/year in all testing categories
IIHS Front Impact:
Good (for similar Impreza models of the era)
Active Features
ABS:
Standard Anti-lock Braking System
Traction Control:
Standard
Electronic Stability Control:
Not standard on all 2006 WRX STI models, but available or standard on later GD generations.
Passive Features
Airbags:
Front airbags, front side-impact airbags
Seatbelts:
3-point front and rear seatbelts with pretensioners
Crumple Zones:
Front and rear crumple zones for energy absorption
💡 Technology Features
Infotainment
Audio System:
Factory AM/FM/CD player with upgraded speaker system
Navigation:
Optional factory navigation system
Driver Assistance
Cruise Control:
Standard
Connectivity
Auxiliary Input:
Optional auxiliary input jack
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 3,750 miles or 3 months (severe use), 7,500 miles or 6 months (normal use)
Air Filter Replacement:
Every 15,000 miles or 12 months
Spark Plug Replacement:
Every 30,000-60,000 miles (depending on plug type)
Timing Belt Replacement:
Every 60,000 miles or 5 years (if applicable, check for interference engine design)
Fluid Specifications
Engine Oil Type:
SAE 5W-30 Synthetic (check manual for exact spec, e.g., API SM or higher)
Engine Oil Capacity:
Approx. 4.8 US quarts (4.5 liters) with filter
Coolant Type:
Subaru Super Coolant (Blue) or equivalent silicate-free antifreeze
Transmission Fluid Type:
GL-4 or GL-5 Gear Oil (e.g., Subaru Extra-S or equivalent)
Transmission Fluid Capacity:
Approx. 3.3 US quarts (3.1 liters)
Differential Fluid Type:
GL-5 Gear Oil (Front and Rear)
Brake Fluid Type:
DOT 3 or DOT 4 Brake Fluid
Known Issues
Engine Knock:
Potential for detonation/knocking if not properly maintained or if using low-octane fuel.
Ringland Failure:
Can occur in EJ257 engines under high stress or with improper tuning/maintenance.
Clutch Wear:
High-performance clutch can wear faster with aggressive driving.
Head Gasket Leaks:
While less common on EJ257 than earlier EJ series, it's a known Subaru issue to monitor.
📚 Vehicle History
Brand Heritage
Rally Roots:
Subaru's strong connection to the World Rally Championship (WRC)
Model Evolution
Gd Generation Updates:
The 2006 model represents a facelift and powertrain update for the GD chassis Impreza WRX STI.
Sti Philosophy:
STI (Subaru Tecnica International) models are performance-tuned versions of the standard Impreza.
Production
Production Period:
2006 model year
Manufacturing Location:
Japan
🏆 Awards & Recognition
Recognitions
Car And Driver 10Best:
Subaru Impreza WRX (non-STI) often featured on Car and Driver's 10Best lists for its class and performance
Rally Championships:
WRX STI platform achieved significant success in WRC, reinforcing its performance credentials.
Ratings
Performance Reviews:
Consistently praised by automotive journalists for its handling, acceleration, and AWD capability.

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Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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