🏷️ Basic Information

Make:

Subaru

Model:

Impreza WRX STI

Year:

2011

Chassis Codes Covered:

GVE, GVF, GRE, GRF

👋 Introduction

Positioning:

The 2011 Impreza WRX STI represented the pinnacle of Subaru's rally-bred performance for the compact segment, offering a potent blend of turbocharged power, Symmetrical All-Wheel Drive, and track-ready handling.

Competitors:

Competed against performance-oriented compacts like the Mitsubishi Lancer Evolution, Volkswagen Golf GTI/R, and Ford Focus RS.

Performance Focus:

High-performance turbocharged engine, advanced AWD system, track-tuned suspension, powerful braking system.

Manual Utility:

Essential resource for owners and technicians to maintain, diagnose, and repair this complex performance vehicle effectively.

📋 Manual Details

Primary Coverage:

Maintenance, Repair, Diagnosis

Included Variants:

Subaru Impreza WRX, Subaru Impreza WRX STI

Estimated Pages:

Approx. 3000+ pages (typical for a comprehensive factory service manual)

Type:

Factory Service Workshop Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Powertrain:

Engine, Transmission (Manual & Automatic), Drivetrain (AWD System)

Chassis:

Suspension (Front & Rear), Steering, Brakes (ABS, EBD), Wheels & Tires

Electrical:

Engine Control Module (ECM), Body Control Module (BCM), Lighting, Instrumentation, Audio, HVAC, SRS (Airbag System)

Body:

Body Exterior, Body Interior, Doors, Windows, Seats, Trim

Maintenance:

Scheduled Maintenance, Fluid Changes, Filter Replacements, Inspections

Repair:

Component Removal & Installation, Reassembly, Calibration

Diagnostics:

Symptom-based Troubleshooting, Diagnostic Trouble Codes (DTCs), Electrical Schematics

Technical Data:

Torque Specifications, Lubricant Recommendations, Wiring Diagrams, Component Locations

Depth:

Comprehensive from basic adjustments to complete engine and transmission overhauls, including advanced electrical system diagnostics.

📊 Manual Specifications

File Type:

PDF

Searchability:

Searchable text for quick information retrieval

Printability:

Printable for physical access during repairs

Quality:

High-resolution digital reproduction ensuring clarity of diagrams and text.

Binding:

N/A (Digital Download)

Paper:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Code:

EJ257

Engine Type:

2.5-liter turbocharged horizontally-opposed (Boxer) 4-cylinder

Displacement:

2457 cc (2.5 Liters)

Horsepower:

305 bhp @ 6000 rpm (approx.)

Torque:

290 lb-ft @ 4000 rpm (approx.)

Fuel Delivery:

Multi-point Fuel Injection (MPI) with Denso top-feed fuel injectors

Ignition System:

Distributorless ignition system with coil-on-plug

ECM:

Denso Engine Control Module (ECM), specific calibration for WRX STI

Radiator Capacity:

Approx. 7.7 Liters (with heater core)

🔧 Transmission

Type:

6-speed manual transmission (TY757VW)

Type:

N/A for WRX STI (Manual transmission was standard)

AWD System:

Symmetrical All-Wheel Drive with Driver Controlled Center Differential (DCCD) and viscous coupling front differential, mechanical rear limited-slip differential (LSD).

Manual Transmission Fluid:

GL-5 75W-90 (Refer to manual for specific Subaru or equivalent)

Differential Fluid Front:

GL-5 75W-90

Differential Fluid Rear:

GL-5 75W-90

📐 Dimensions

Wheelbase:

103.2 inches (2620 mm)

Length:

179.7 inches (4565 mm)

Width:

70.7 inches (1795 mm)

Height:

58.1 inches (1475 mm)

Curb Weight:

3,373 - 3,417 lbs (approx.)

Gross Vehicle Weight Rating:

4,499 lbs (approx.)

Trunk Volume:

11.3 cubic feet (approx.)

Standard Wheel Size:

18 x 8.5 inch alloy

Standard Tire Size:

245/40R18

Bolt Pattern:

5x114.3mm

Lug Nut Torque:

87 lb-ft (approx.)

🛡️ Safety Features

NHTSA Frontal Crash:

4/5 Stars (2011 Model Year)

IIHS Roof Strength:

Good

ABS:

Anti-lock Braking System (ABS) with Electronic Brake-force Distribution (EBD)

Traction Control:

Vehicle Dynamics Control (VDC) - includes traction and stability control

Brake Assist:

Brake Assist System (BAS)

Airbags:

Driver and front passenger airbags, front side-impact airbags, side curtain airbags.

Seatbelts:

3-point front and rear seatbelts with pre-tensioners and force limiters.

Child Anchors:

LATCH (Lower Anchors and Tethers for CHildren) system.

💡 Technology Features

Head Unit:

Factory premium audio system with CD player, MP3 capability, and available navigation system.

Connectivity:

Auxiliary audio input jack.

Cruise Control:

Standard cruise control.

Keyless Entry:

Standard keyless entry and engine start.

HVAC:

Manual or automatic climate control systems, depending on trim level.

🔧 Maintenance

Oil Change Interval:

Every 3,750 miles or 6 months, or 7,500 miles/12 months under severe conditions (refer to manual for specific recommendations).

Spark Plug Replacement:

Typically around 60,000 miles for iridium-tipped plugs, consult manual.

Timing Belt Or Chain:

EJ257 uses a timing belt. Replacement interval typically 105,000 miles or 7 years. Crucial for preventing catastrophic engine damage if it breaks.

Engine Oil Capacity:

5.1 US quarts (4.8 Liters) with filter

Engine Oil Type:

SAE 0W-30 or 5W-30 Synthetic (API SG, SH, SJ, SL, SM, SN or ILSAC GF-3, GF-4, GF-5)

Coolant Type:

Subaru Super Coolant (Blue) or equivalent silicate-free, long-life coolant

Brake Fluid Type:

DOT 3 or DOT 4

Head Gaskets:

While less common on the EJ257 than earlier EJ25s, head gasket failure can still occur, especially with aggressive tuning or high mileage. The manual will detail inspection and replacement procedures.

Clutch Wear:

Performance driving can accelerate clutch wear. Manual will cover clutch inspection and replacement.

Turbocharger Issues:

Oil starvation or contamination can lead to turbo failure. Regular oil changes and proper cool-down are critical. Manual details turbo inspection and service.

Rear Differential Noise:

Occasional reports of noise or wear in the rear differential. Manual provides diagnostic steps.

📚 Vehicle History

Motorsport Connection:

Subaru's strong heritage in the World Rally Championship (WRC) directly influenced the development and performance characteristics of the Impreza WRX STI.

Third Generation Gd Gg:

The 2011 model is part of the third generation (G11/G12) Impreza, known for its distinctive hatchback body style (though sedans were available in some markets) and evolving STI performance.

Manufacturing Location:

Gunma Plant, Japan

🏆 Awards & Recognition

Car And Driver 10Best:

While the Impreza WRX/STI has been a frequent contender and recipient of awards in previous generations, specific '10Best' awards for the 2011 model year would need to be verified against automotive publications of that era.

Performance Reviews:

Consistently praised by automotive media for its exhilarating performance, sophisticated AWD system, and rally-bred character.

Emissions:

Meets EPA and California Air Resources Board (CARB) emissions standards for its model year. Manual will include emissions control system details.