Subaru Subaru WRX 2008-2014 Electrical Specifications
Explore the complete electrical specifications for the 2008-2014 Subaru WRX, including wiring diagrams, fuse box layouts, alternator output, battery details, and sensor configurations. Ideal for maintenance, repairs, and upgrades.
Overview Specifications
This document provides detailed electrical specifications for the 2008-2014 Subaru WRX. It is designed to assist technicians, enthusiasts, and owners in understanding the vehicle's electrical systems, including wiring, battery, alternator, and lighting. Use this guide to troubleshoot, maintain, or upgrade your WRX's electrical components. The document is organized into sections for easy navigation, with quick reference tables for key specifications.
How to Use
Use the search function to locate specific terms or components. Enter keywords like 'alternator' or 'fuse box' to quickly find relevant information.
Navigate through sections using the table of contents. Each section is divided into subsections with detailed technical points for easy reference.
Key Specifications
Battery Voltage
12V
Alternator Output
110A
Headlight Wattage
55W (low beam)
Main Fuse Rating
120A
Wire Gauge
16-12 AWG
Available Specifications
Battery and Charging System
This section covers the battery, alternator, and charging system specifications for the 2008-2014 Subaru WRX. Learn about voltage requirements, charging rates, and maintenance tips to ensure optimal performance.
Battery and Charging System
This section covers the battery, alternator, and charging system specifications for the 2008-2014 Subaru WRX. Learn about voltage requirements, charging rates, and maintenance tips to ensure optimal performance.
Battery Specifications
- Battery type: 12V lead-acid
- Capacity: 55 Ah
- Cold Cranking Amps (CCA): 550 A
- Dimensions: 9.1 x 6.9 x 7.5 inches
- Terminal type: Top post
- Maintenance: Sealed, maintenance-free
Alternator Specifications
- Output: 110 A
- Voltage: 12V
- Belt type: Serpentine
- Pulley diameter: 2.5 inches
- Regulator type: Internal
Lighting System
Explore the lighting system specifications, including headlights, taillights, and interior lighting. This section provides details on bulb types, wattage, and wiring configurations.
Lighting System
Explore the lighting system specifications, including headlights, taillights, and interior lighting. This section provides details on bulb types, wattage, and wiring configurations.
Headlight Specifications
- Low beam: H11, 55W
- High beam: 9005, 65W
- Bulb type: Halogen
- Voltage: 12V
- Beam pattern: Projector
Taillight Specifications
- Brake light: 7443, 21W
- Turn signal: 7440, 21W
- Reverse light: 7440, 18W
- Bulb type: LED (optional upgrade)
- Voltage: 12V
Fuse Box and Wiring
This section details the fuse box layout, wiring diagrams, and circuit protection for the 2008-2014 Subaru WRX. Understand the amperage ratings and fuse locations for troubleshooting.
Fuse Box and Wiring
This section details the fuse box layout, wiring diagrams, and circuit protection for the 2008-2014 Subaru WRX. Understand the amperage ratings and fuse locations for troubleshooting.
Fuse Box Layout
- Main fuse: 120A
- Ignition fuse: 15A
- Headlight fuse: 10A
- Accessory fuse: 7.5A
- Location: Under dashboard and engine bay
Wiring Specifications
- Wire gauge: 16-12 AWG
- Color coding: Standard Subaru wiring colors
- Ground points: Multiple chassis locations
- Connector types: Weatherproof
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Component Specifications
Overview
- Type
- 12V DC system
- Configuration
- Negative ground
- Platform
- Integrated CAN bus system
- Material
- Copper wiring with PVC insulation
- Location
- Distributed throughout vehicle
Dimensions
- Battery Length
- 9.5 in (241 mm)
- Battery Width
- 6.9 in (175 mm)
- Battery Height
- 7.5 in (190 mm)
- Alternator Diameter
- 5.1 in (130 mm)
- Alternator Length
- 7.9 in (200 mm)
- Wire Gauge Range
- 8 AWG to 22 AWG
- Fuse Box Dimensions
- 8.3 x 5.9 x 2.4 in (210 x 150 x 60 mm)
Materials
- Wiring
- Copper core with PVC insulation
- Battery Case
- Polypropylene
- Alternator Housing
- Aluminum alloy
- Fuse Box
- Thermoplastic
- Connectors
- Nylon with brass contacts
Features
- Lighting
-
- HID headlights
- LED tail lights
- Fog lights
- Daytime running lights
- Power Distribution
-
- Centralized fuse box
- Smart alternator control
- Battery monitoring system
- Circuit protection relays
- infotainment
-
- 6-speaker audio system
- Bluetooth connectivity
- Auxiliary input
- Steering wheel controls
- Safety Systems
-
- ABS wiring harness
- Airbag control module
- Tire pressure monitoring
- Stability control sensors
- Comfort
-
- Power windows
- Remote keyless entry
- Heated seats
- Automatic climate control
Safety Features
- Circuit Protection
-
- Main fuse block
- Individual circuit fuses
- Relay protection
- Crash Safety
-
- Automatic battery disconnect
- Protected wiring harness routing
- Impact sensors
- Fire Prevention
-
- Flame-retardant wiring
- Thermal fuses
- Overcurrent protection
Comfort Features
- Climate Control
-
- Automatic temperature regulation
- Rear defogger
- Heated mirrors
- Lighting
-
- Auto-on headlights
- Interior mood lighting
- Map lights
- Convenience
-
- Power outlets
- USB charging ports
- Cargo area light
Accessories
- Audio
-
- Premium sound system
- Subwoofer
- Satellite radio
- Lighting
-
- LED upgrade kits
- Fog light kits
- Interior LED strips
- Performance
-
- Upgraded alternator
- High-capacity battery
- Performance wiring harness
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Battery terminal cleaning
- Alternator belt inspection
- Fuse condition check
- Ground connection verification
- Wiring harness inspection
- Maintenance Notes
- Use only manufacturer-recommended replacement parts for electrical components
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Electrical components excluding wear items
- Powertrain
- Miles: 60,000Years: 5Coverage: Alternator and starter motor
- Corrosion
- Miles: UnlimitedYears: 5Coverage: Wiring harness and connectors
- Battery
- Miles: 36,000Years: 3Coverage: Original equipment battery
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Automated wiring harness assembly
- Robotic component installation
- Precision testing of electrical systems
- Quality Control
- Testing: Continuity testing, Load testing, Water resistance testingStandards: ISO 9001, SAE J1128, IP67 rating for connectors
- Sustainability
-
- Lead-free solder
- Recyclable wiring materials
- Energy-efficient production
- Production Metrics
- Daily Output: 500 unitsDefect Rate: 0.02%Testing Time: 2.5 hours per vehicle
Service Information for electrical Service
Maintenance and service requirements specific to electrical systems
- Inspect battery terminals and cables
- Check alternator output
- Test all exterior lighting
- Verify ground connections
- Inspect wiring harness for damage
Use dielectric grease on all electrical connections
- Load test battery
- Inspect alternator brushes
- Check starter motor operation
- Test all interior electrical components
- Verify CAN bus communication
Special diagnostic equipment required for CAN bus testing
- Replace battery if necessary
- Inspect and clean all ground points
- Check wiring harness routing
- Test all safety system circuits
- Verify charging system performance
Consider replacing original battery as preventive maintenance
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What electrical components are compatible with the 2008-2014 Subaru WRX?
What electrical components are compatible with the 2008-2014 Subaru WRX?
The 2008-2014 Subaru WRX features a 2.5L turbocharged engine with a 32-bit ECU, compatible with most aftermarket performance parts. Key electrical components include the alternator (90-120A), battery (12V, 550-650 CCA), and wiring harnesses specific to the model year. Ensure compatibility with OEM or aftermarket parts by verifying part numbers and consulting the vehicle's service manual.
Q2 What are the maintenance requirements for the electrical system in a 2008-2014 Subaru WRX?
What are the maintenance requirements for the electrical system in a 2008-2014 Subaru WRX?
Regular maintenance includes inspecting the battery terminals for corrosion, checking the alternator output (13.5-14.5V), and ensuring all fuses and relays are functional. Replace the battery every 3-5 years and inspect wiring harnesses for wear or damage. Follow the manufacturer's 30,000-mile service intervals for detailed electrical system checks.
Q3 How do I replace the alternator in a 2008-2014 Subaru WRX?
How do I replace the alternator in a 2008-2014 Subaru WRX?
To replace the alternator, disconnect the negative battery terminal. Remove the serpentine belt using a tensioner tool. Unbolt the alternator (typically 12mm or 14mm bolts) and disconnect the electrical connectors. Install the new alternator, reconnect the wiring, and reinstall the serpentine belt. Test the alternator output with a multimeter to ensure proper function.
Q4 What should I do if my 2008-2014 Subaru WRX has electrical issues?
What should I do if my 2008-2014 Subaru WRX has electrical issues?
Start by checking the battery voltage and connections. Inspect fuses and relays for damage. Use a multimeter to test the alternator output and wiring continuity. Common issues include faulty grounds, corroded connectors, or a failing alternator. Refer to the service manual for specific diagnostic codes and troubleshooting steps.
Q5 How can I optimize the electrical performance of my 2008-2014 Subaru WRX?
How can I optimize the electrical performance of my 2008-2014 Subaru WRX?
Upgrade to a high-output alternator (e.g., 150A) for better power delivery. Use high-quality wiring and connectors to reduce resistance. Install a performance battery with higher CCA for improved cold starts. Consider adding a capacitor for audio systems or aftermarket electronics to stabilize voltage and reduce strain on the electrical system.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2008-2014 Subaru WRX Service Manual
Coming SoonComprehensive guide covering electrical system diagnostics, maintenance, and repair procedures for the 2008-2014 Subaru WRX.
Subaru Technical Service Bulletin (TSB) for Electrical Systems
Coming SoonOfficial TSB addressing common electrical issues, updates, and fixes for the 2008-2014 Subaru WRX.
Subaru WRX Parts and Accessories Catalog
Coming SoonDetailed catalog of OEM and aftermarket electrical components, including part numbers and compatibility information.
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Technical Information
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