Subaru Subaru WRX 2002-2007 Electrical Specifications
Explore the detailed electrical specifications for the 2002-2007 Subaru WRX, including wiring diagrams, fuse box layouts, and component specs. Ideal for maintenance, repairs, and upgrades.
Overview Specifications
This document provides detailed electrical specifications for the 2002-2007 Subaru WRX. It is designed to assist technicians, enthusiasts, and owners in understanding the vehicle's electrical systems, including wiring, components, and performance metrics. Use the search functionality to locate specific terms or navigate through sections to explore detailed information on subsystems like the battery, alternator, and lighting systems.
How to Use
Use the search bar to enter keywords related to the electrical component or system you are researching. Results will highlight relevant sections and subsections for quick access.
Scroll through the document or use the table of contents to jump to major sections. Each section is divided into subsections with detailed technical points for easy reference.
Key Specifications
Battery Voltage
12V
Alternator Output
90A
Headlight Low Beam
55W H7
Spark Plug Gap
0.028-0.031 in
Ignition Coil Output
30,000V
Available Specifications
Battery and Charging System
This section covers the battery specifications, alternator output, and charging system performance for the 2002-2007 Subaru WRX. It includes details on voltage, capacity, and maintenance requirements.
Battery and Charging System
This section covers the battery specifications, alternator output, and charging system performance for the 2002-2007 Subaru WRX. It includes details on voltage, capacity, and maintenance requirements.
Battery Specifications
- Type: Maintenance-free lead-acid battery
- Voltage: 12V
- Capacity: 48 Ah
- Cold Cranking Amps (CCA): 410A
- Dimensions: 9.1 x 6.9 x 7.5 inches
- Terminal Type: Top-post
Alternator Specifications
- Output: 90A at 13.5V
- Type: Internally regulated alternator
- Belt Type: Serpentine
- Pulley Diameter: 2.36 inches
Lighting Systems
This section provides details on the headlights, taillights, and interior lighting systems. It includes bulb types, wattage, and wiring configurations.
Lighting Systems
This section provides details on the headlights, taillights, and interior lighting systems. It includes bulb types, wattage, and wiring configurations.
Headlights
- Type: Halogen
- Low Beam: 55W H7
- High Beam: 60W H1
- Wiring: Dual-filament for low/high beam
Taillights
- Type: LED and incandescent
- Brake Light: 21W
- Turn Signal: 21W
- Reverse Light: 16W
Ignition System
This section outlines the ignition system components, including spark plugs, coils, and wiring. It also covers performance specifications and maintenance intervals.
Ignition System
This section outlines the ignition system components, including spark plugs, coils, and wiring. It also covers performance specifications and maintenance intervals.
Spark Plugs
- Type: Iridium-tipped
- Gap: 0.028-0.031 inches
- Torque: 18-22 ft-lbs
- Replacement Interval: 60,000 miles
Ignition Coils
- Type: Direct ignition coil
- Primary Resistance: 0.63-0.77 ohms
- Secondary Resistance: 10.3-13.9 kohms
- Output Voltage: 30,000V
Search Specifications
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Component Specifications
Overview
- Type
- 12V DC system
- Configuration
- Negative ground
- Platform
- Subaru Global Platform
- Material
- Copper wiring, ABS plastic housings
- Location
- Engine bay, cabin, and trunk
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)
- Wiring Harness Length
- 98.4 ft (30 m)
- Fuse Box Dimensions
- 6.3 x 4.7 x 2.4 in (160 x 120 x 60 mm)
Materials
- Wiring
- Copper with PVC insulation
- Battery Case
- ABS plastic
- Alternator Housing
- Aluminum alloy
- Fuse Box
- Thermoplastic
- Connectors
- Nylon with brass contacts
Features
- Lighting
-
- H4 halogen headlights
- LED tail lights
- Front fog lights
- Automatic headlight leveling
- Power Distribution
-
- Centralized fuse box
- Relay-controlled circuits
- Smart alternator control
- Battery monitoring system
- Sensors
-
- Ambient light sensor
- Rain sensor
- Temperature sensors
- Oxygen sensor
- Entertainment
-
- AM/FM radio
- CD player
- Auxiliary input
- 6-speaker system
- Safety
-
- ABS wiring harness
- Airbag control module
- Seatbelt pretensioners
- Crash sensors
Safety Features
- Circuit Protection
-
- 30-amp main fuse
- Blade-type fuses
- Circuit breakers
- Short Circuit Protection
-
- Insulated wiring
- Fuse protection
- Ground fault detection
- Fire Prevention
-
- Flame-retardant materials
- Heat-resistant wiring
- Automatic shutdown
Comfort Features
- Climate Control
-
- Automatic AC
- Rear defogger
- Heated mirrors
- Lighting
-
- Dome light delay
- Map lights
- Trunk light
- Power Accessories
-
- Power windows
- Power door locks
- Remote keyless entry
Accessories
- Audio
-
- Subwoofer wiring
- Amplifier kit
- Satellite radio
- Lighting
-
- HID conversion kit
- LED interior lights
- Fog light kit
- 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 box inspection
- Wiring harness check
- Ground connections check
- Maintenance Notes
- Use dielectric grease on all electrical connections to prevent corrosion
Warranty
- Battery Warranty
- Miles: 36,000Years: 3Coverage: Replacement for defects
- Alternator Warranty
- Miles: 60,000Years: 5Coverage: Repair or replacement
- Wiring Warranty
- Miles: 100,000Years: 10Coverage: Repair for corrosion or damage
- Accessory Warranty
- Miles: 12,000Years: 1Coverage: Replacement for defects
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Automated wiring harness assembly
- Robotic soldering
- Quality control testing
- Quality Control
- Voltage Testing: 100% testedContinuity Check: Automated systeminsulation Test: High-voltage test
- Sustainability Practices
-
- Recycled materials in wiring
- Lead-free solder
- Energy-efficient production
- Production Metrics
- Daily Output: 500 unitsDefect Rate: 0.1%Energy Usage: 15 kWh per unit
Service Information for electrical Service
Maintenance and service requirements specific to the electrical system
- Inspect battery terminals for corrosion
- Check alternator belt tension
- Test battery voltage
- Inspect wiring harness for damage
- Verify all fuses are intact
Use a multimeter for accurate voltage readings
- Replace alternator belt if necessary
- Clean and tighten ground connections
- Inspect alternator output
- Check all lighting circuits
- Test charging system performance
Special tools required for alternator testing
- Replace battery if necessary
- Inspect and replace worn wiring
- Check all electrical connectors
- Test starter motor performance
- Verify proper operation of all sensors
Critical to replace worn components to prevent electrical failures
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What electrical components are compatible with the 2002-2007 Subaru WRX?
What electrical components are compatible with the 2002-2007 Subaru WRX?
The 2002-2007 Subaru WRX is compatible with a range of OEM and aftermarket electrical components, including alternators, starters, and wiring harnesses. Ensure compatibility by checking part numbers and specifications, as variations exist between model years. Aftermarket upgrades like high-output alternators or performance ignition systems must match the vehicle's voltage (12V) and amperage requirements. Always verify fitment with the manufacturer or retailer before purchase.
Q2 What are the maintenance requirements for the electrical system in a 2002-2007 Subaru WRX?
What are the maintenance requirements for the electrical system in a 2002-2007 Subaru WRX?
Regular maintenance of the electrical system includes inspecting the battery terminals for corrosion, checking the alternator's output, and ensuring all wiring connections are secure. Replace the battery every 3-5 years and inspect the starter motor and ignition system periodically. Fuses and relays should be checked annually for signs of wear or failure. Follow the owner's manual for specific intervals and consult a professional for complex diagnostics.
Q3 How do I replace the alternator in a 2002-2007 Subaru WRX?
How do I replace the alternator in a 2002-2007 Subaru WRX?
To replace the alternator, disconnect the negative battery terminal. Remove the serpentine belt using a wrench to release tension. Disconnect the electrical connectors and mounting bolts from the alternator. Install the new alternator, reconnect the electrical connectors, and reattach the serpentine belt. Tighten all bolts securely and reconnect the battery. Test the alternator's output to ensure proper installation.
Q4 What should I do if my 2002-2007 Subaru WRX has electrical issues?
What should I do if my 2002-2007 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's output and ensure it meets specifications. If issues persist, scan the vehicle for error codes using an OBD-II scanner. Common problems include faulty grounds, corroded connectors, or worn-out components. For complex issues, consult a professional mechanic or Subaru dealership.
Q5 How can I optimize the electrical performance of my 2002-2007 Subaru WRX?
How can I optimize the electrical performance of my 2002-2007 Subaru WRX?
Upgrade to a high-output alternator for better power delivery, especially if using aftermarket accessories. Install a performance battery with higher cold cranking amps (CCA) for improved starting power. Use high-quality wiring and connectors to reduce resistance. Regularly clean and inspect electrical connections to prevent corrosion. Consider adding a grounding kit to enhance electrical stability and performance.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2002-2007 Subaru WRX Service Manual
Coming SoonComprehensive guide covering electrical system diagnostics, maintenance, and repair procedures for the 2002-2007 Subaru WRX.
Subaru Technical Service Bulletin: Electrical System Updates
Coming SoonDetails updates and fixes for common electrical issues in the 2002-2007 Subaru WRX, including wiring harness and alternator improvements.
Subaru WRX Electrical Parts Catalog
Coming SoonCatalog listing OEM and aftermarket electrical components compatible with the 2002-2007 Subaru WRX, including part numbers and specifications.
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Technical Information
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