🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STi Model Variant: WRX STi Product Name: MOVIE WAVS: Subaru Impreza STi Codes License Reference: ars_0853 👋 Introduction Market Position Target...
Varies by generation, typically ranging from 300 to 340+ hp (e.g., 305 hp for 2008-2014 STi)
Torque:
Varies by generation, typically ranging from 290 to 330+ lb-ft (e.g., 290 lb-ft for 2008-2014 STi)
Fuel System
Fuel Delivery:
Electronic Fuel Injection (EFI), often with Multi-Point Fuel Injection (MPFI)
Engine Cooling
Cooling System:
Pressurized liquid cooling system with thermostatically controlled fan
Engine Management
ECU Type:
Engine Control Unit (ECU) with advanced engine management capabilities, often supporting performance tuning.
🔧 Transmission
Standard
Transmission Type:
6-speed manual transmission (e.g., TY757VV for many generations)
Optional
Optional Transmission:
Not typically offered on STi models, emphasizing manual engagement.
Features
Drivetrain:
Symmetrical All-Wheel Drive (AWD) with Driver Controlled Centre Differential (DCCD).
Differentials:
Helical Limited-Slip Front Differential, Mechanical Limited-Slip Rear Differential.
📐 Dimensions
Exterior
Body Styles:
Sedan, Hatchback (depending on generation)
Wheelbase:
Varies by generation, approximately 103.0 - 104.2 inches.
Length:
Varies by generation and body style, approximately 174.5 - 180.0 inches.
Width:
Varies by generation, approximately 69.7 - 70.9 inches.
Height:
Varies by generation, approximately 57.1 - 58.1 inches.
Weights
Curb Weight:
Varies by generation and body style, typically around 3,200 - 3,350 lbs.
Cargo
Trunk Volume:
Varies by body style, approximately 11.6 - 13.1 cu. ft. for sedans.
🛡️ Safety Features
Ratings
NHTSA Rating:
Typically 5-star ratings for frontal and side impacts in applicable years.
Active Features
Brake System:
Performance Brembo® brakes (front and rear) with multi-piston calipers and ventilated rotors.
Traction Control:
Advanced Traction Control System (TCS) and Vehicle Dynamics Control (VDC) with customizable modes.
Passive Features
Airbags:
Multi-stage front airbags, front side-impact airbags, curtain side airbags.
Body Structure:
Advanced Ring-Shaped Reinforcement Frame for enhanced crash safety.
💡 Technology Features
Infotainment
Infotainment System:
Varies by generation; includes touchscreen displays, navigation systems, Bluetooth connectivity, and premium audio options (e.g., Harman Kardon).
Driver Assistance
Driver Assistance Features:
Features like cruise control, ABS, VDC. Later generations introduced EyeSight® Driver Assist Technology (though not always standard on STi).
Connectivity
Connectivity Options:
USB ports, auxiliary audio input, Bluetooth for hands-free calling and audio streaming.
Performance Tech
Dccd System:
Driver Controlled Centre Differential (DCCD) allows manual adjustment of front-to-rear torque split for varying conditions.
Si Drive:
Subaru Intelligent Drive (SI-DRIVE) system offering selectable driving modes (e.g., Intelligent, Sport, Sport Sharp) to alter engine and transmission response.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically every 3,000-7,500 miles or 3-6 months, depending on driving conditions and oil type used.
Timing Belt Replacement:
For EJ257 engines with timing belts, typically at 105,000 miles or 7 years. Later models use timing chains.
Spark Plug Replacement:
Typically around 60,000 miles for iridium spark plugs.
Fluid Specifications
Engine Oil:
API SN or higher, SAE 5W-30 or 5W-40 synthetic oil recommended (check owner's manual for specific viscosity based on climate).
Coolant:
Subaru Super Coolant (blue color) or equivalent P-HOAT coolant, mixed 50/50 with distilled water.
Transmission Fluid:
API GL-5, SAE 75W-90 synthetic gear oil for the manual transmission.
Differential Fluid:
API GL-5, SAE 75W-90 synthetic gear oil for front and rear differentials.
Known Issues
Engine Ring Land Failure:
A known potential issue on EJ257 engines, particularly with aggressive tuning or detonation. Regular use of high-octane fuel is crucial.
Clutch Wear:
Can be accelerated with aggressive driving or frequent use of the launch control feature.
Brake Dust And Noise:
High-performance brake pads (like Brembos) often produce more dust and can be noisier than standard pads.
📚 Vehicle History
Brand Heritage
Subaru Rally History:
Subaru's deep roots in World Rally Championship (WRC) success, with legendary drivers like Colin McRae and Richard Burns.
Model Evolution
Generations:
Multiple generations, starting from the GC8 in the mid-1990s, evolving through GD, GR/GV, and VA chassis.
Production
Manufacturing Locations:
Primarily Japan, with some assembly in other regions depending on the generation.