Subaru Subaru WRX 2014-2021 Electrical Specifications
Explore the detailed electrical specifications for the 2014-2021 Subaru WRX, including battery, alternator, wiring, and fuse details. Ideal for maintenance, repairs, and upgrades.
Overview Specifications
This document provides detailed electrical specifications for the 2014-2021 Subaru WRX. It is designed to assist technicians, enthusiasts, and owners in understanding the vehicle's electrical systems, including the battery, alternator, wiring, and lighting. Use the search functionality to locate specific terms or navigate through sections to explore detailed information about each component. This guide is a comprehensive resource for troubleshooting, maintenance, and upgrades.
How to Use
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Scroll through the document or use the table of contents to jump to specific sections. Each section is organized into subsections with detailed technical points for easy reference.
Key Specifications
Battery Voltage
12V
Alternator Output
130A
Headlight Low Beam
55W H11
Fuse Ratings
5A-40A
Interior Dome Light
8W Festoon
Available Specifications
Battery and Charging System
This section covers the battery specifications, alternator output, and charging system details for the 2014-2021 Subaru WRX. It includes information on voltage, capacity, and maintenance requirements to ensure optimal performance.
Battery and Charging System
This section covers the battery specifications, alternator output, and charging system details for the 2014-2021 Subaru WRX. It includes information on voltage, capacity, and maintenance requirements to ensure optimal performance.
Battery Specifications
- Type: Maintenance-free AGM (Absorbent Glass Mat)
- Voltage: 12V
- Capacity: 48 Ah (Cold Cranking Amps: 550 CCA)
- Location: Engine bay, right side
- Replacement interval: Approximately 3-5 years
- Compatible with aftermarket upgrades
Alternator Output
- Output: 130A at 12V
- Type: Internally regulated alternator
- Efficiency: 85% at full load
- Compatible with high-demand electrical accessories
- Replacement interval: 100,000-150,000 miles
Lighting Systems
This section details the lighting systems, including headlights, taillights, and interior lighting. It provides specifications for bulb types, wattage, and compatibility with aftermarket upgrades.
Lighting Systems
This section details the lighting systems, including headlights, taillights, and interior lighting. It provides specifications for bulb types, wattage, and compatibility with aftermarket upgrades.
Headlights
- Type: Halogen (standard), HID or LED (optional/aftermarket)
- Low beam: 55W H11 bulb
- High beam: 65W HB3 bulb
- Daytime Running Lights (DRL): Integrated LED
- Compatible with aftermarket projector headlights
Interior Lighting
- Dome light: 8W festoon bulb
- Map lights: 5W wedge bulbs
- Trunk light: 5W wedge bulb
- Compatible with LED upgrades for all interior lights
Wiring and Fuses
This section provides information on the wiring harness, fuse box locations, and fuse ratings. It includes details on circuit protection and troubleshooting tips for common electrical issues.
Wiring and Fuses
This section provides information on the wiring harness, fuse box locations, and fuse ratings. It includes details on circuit protection and troubleshooting tips for common electrical issues.
Fuse Box Locations
- Main fuse box: Under the hood, driver's side
- Interior fuse box: Under the dashboard, driver's side
- Fuse ratings: 5A to 40A, depending on the circuit
- Spare fuses included in the fuse box
Wiring Harness
- Material: Copper with PVC insulation
- Color-coded for easy identification
- Resistant to heat and abrasion
- Compatible with aftermarket accessories
Search Specifications
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Component Specifications
Overview
- Type
- 12V DC system
- Configuration
- Negative ground
- Platform
- Subaru Global Platform
- Material
- Copper wiring, aluminum connectors
- 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
- 6.3 in (160 mm)
- Wiring Harness Length
- 328 ft (100 m)
- Fuse Box Dimensions
- 8.3 x 5.9 x 2.4 in (210 x 150 x 60 mm)
Materials
- Wiring
- Copper with PVC insulation
- Connectors
- Aluminum with corrosion-resistant coating
- Battery Case
- Polypropylene
- Alternator Housing
- Aluminum alloy
- Fuse Box
- Thermoplastic
Features
- Lighting
-
- LED headlights
- LED daytime running lights
- LED taillights
- Automatic headlight leveling
- Power Distribution
-
- Centralized fuse box
- Smart alternator control
- Battery management system
- Load shedding capability
- infotainment
-
- 6.5-inch touchscreen display
- Bluetooth connectivity
- USB ports
- Steering wheel controls
- Safety Systems
-
- ABS wiring harness
- Airbag control module
- Tire pressure monitoring system
- Stability control sensors
- Comfort
-
- Automatic climate control
- Power windows with auto-up/down
- Keyless entry system
- Heated seats
Safety Features
- Circuit Protection
-
- Smart fuse system
- Overload protection
- Short circuit detection
- Crash Safety
-
- Automatic battery disconnect
- Impact sensor wiring
- Emergency power cut-off
- Weather Resistance
-
- Waterproof connectors
- Corrosion-resistant terminals
- Sealed fuse box
Comfort Features
- Climate Control
- Dual-zone automatic
- Lighting
-
- Ambient interior lighting
- Automatic dimming mirror
- Map lights
- Audio
-
- 6-speaker system
- AM/FM radio
- HD Radio
- Convenience
-
- Power door locks
- Remote keyless entry
- Cruise control
Accessories
- Lighting
-
- Fog light kit
- LED interior light upgrade
- Daytime running light module
- Audio
-
- Upgraded speakers
- Subwoofer package
- Amplifier kit
- Performance
-
- Performance battery
- Upgraded alternator
- High-output wiring harness
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Battery terminal cleaning
- Alternator belt inspection
- Ground connection check
- Fuse inspection
- Wiring harness inspection
- Notes
- Use only manufacturer-approved electrical components
Warranty
- Basic
- Years: 3Miles: 36000Coverage: Electrical components
- Powertrain
- Years: 5Miles: 60000Coverage: Alternator, starter
- Corrosion
- Years: 5Miles: UnlimitedCoverage: Electrical connectors
- Battery
- Years: 3Miles: 36000Coverage: Original equipment battery
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Automated wiring harness assembly
- Robotic connector installation
- Computerized testing
- Quality Control
- Testing: Continuity testing, Load testing, Vibration testingStandards: ISO 9001, ISO 14001, JIS D 0203
- Sustainability
-
- Lead-free solder
- Recyclable wiring
- Energy-efficient production
- Production Metrics
- Daily Output: 1200 unitsDefect Rate: 0.02%Energy Usage: 15 kWh per vehicle
Service Information for electrical Service
Maintenance and service requirements specific to electrical system
- Battery terminal inspection
- Alternator output test
- Ground connection check
- Lighting system check
- Fuse inspection
Check for corrosion on terminals
- Battery load test
- Alternator belt replacement
- Wiring harness inspection
- Connector corrosion check
- Fuse box cleaning
Use dielectric grease on connectors
- Complete electrical system diagnostic
- Battery replacement
- Alternator performance test
- Ground strap replacement
- Fuse box inspection
Replace all worn components
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What electrical components are compatible with the 2014-2021 Subaru WRX?
What electrical components are compatible with the 2014-2021 Subaru WRX?
The 2014-2021 Subaru WRX is compatible with a range of electrical components, including OEM and aftermarket options. Key components include the alternator (12V, 110-130A), battery (12V, 500-600 CCA), and wiring harnesses designed for turbocharged engines. Ensure compatibility by checking part numbers and consulting the vehicle's service manual. Aftermarket upgrades like high-output alternators or performance batteries must meet OEM specifications to avoid electrical system damage.
Q2 What are the maintenance requirements for the electrical system in a 2014-2021 Subaru WRX?
What are the maintenance requirements for the electrical system in a 2014-2021 Subaru WRX?
Regular maintenance for the electrical system includes inspecting the battery terminals for corrosion, testing the alternator output, and checking wiring for wear or damage. Replace the battery every 3-5 years and ensure the alternator is functioning within 13.5-14.5 volts. Inspect fuses and relays annually. Follow the owner's manual for specific intervals and consult a professional for complex diagnostics or repairs.
Q3 How do I replace the alternator in a 2014-2021 Subaru WRX?
How do I replace the alternator in a 2014-2021 Subaru WRX?
To replace the alternator, disconnect the negative battery terminal. Remove the serpentine belt using a belt tensioner tool. Unbolt the alternator and disconnect its electrical connectors. Install the new alternator, reconnect the electrical connectors, and reinstall the serpentine belt. Reconnect the battery terminal and test the alternator output with a multimeter. Refer to the service manual for torque specifications and detailed steps.
Q4 What should I do if my Subaru WRX's electrical system is malfunctioning?
What should I do if my Subaru WRX's electrical system is malfunctioning?
Start by checking the battery voltage and connections. Inspect fuses and relays for damage. Use a multimeter to test the alternator output and wiring for continuity. Common issues include a failing alternator, corroded terminals, or blown fuses. If the problem persists, consult the service manual or a professional technician for advanced diagnostics and repair.
Q5 How can I optimize the electrical system performance in my Subaru WRX?
How can I optimize the electrical system performance in my Subaru WRX?
Upgrade to a high-output alternator for increased power capacity. Use a performance battery with higher cold cranking amps (CCA) for better starting power. Install a grounding kit to improve electrical flow and reduce resistance. Regularly clean battery terminals and inspect wiring for wear. Avoid overloading the system with aftermarket accessories that exceed the alternator's output capacity.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2014-2021 Subaru WRX Service Manual
Coming SoonComprehensive guide covering electrical system diagnostics, maintenance, and repair procedures for the 2014-2021 Subaru WRX.
Subaru Technical Service Bulletin (TSB) for Electrical System Updates
Coming SoonDetails common electrical system issues and recommended fixes for the 2014-2021 Subaru WRX, including alternator and battery updates.
Subaru WRX Electrical Parts Catalog
Coming SoonCatalog listing OEM and compatible aftermarket electrical components for the 2014-2021 Subaru WRX, including alternators, batteries, and wiring harnesses.
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