Subaru Subaru Impreza 2017-present Electrical Specifications

The 2017-Present Subaru Impreza features a 12-volt electrical system with a 12V battery and a 100-amp alternator. It supports advanced features like EyeSight Driver Assist Technology, LED lighting, and a 6.5-inch or 8-inch infotainment system. The vehicle is compatible with aftermarket accessories, but ensure they meet Subaru's specifications to avoid voiding the warranty or causing electrical issues.

Regular maintenance includes inspecting the battery terminals for corrosion, checking the alternator's output, and ensuring all fuses and wiring are intact. The battery should be tested annually and replaced every 3-5 years. Additionally, software updates for the infotainment system and EyeSight technology should be performed during routine service visits to maintain optimal performance.

To replace the battery, first, disconnect the negative terminal followed by the positive terminal. Remove the battery hold-down clamp and carefully lift the battery out. Install the new battery, secure it with the clamp, and reconnect the terminals in reverse order (positive first, then negative). Ensure the battery is properly seated and terminals are tightened to avoid electrical issues.

Start by checking the battery connections for corrosion or looseness. Inspect fuses for any blown ones and replace them if necessary. If the issue persists, use a diagnostic tool to scan for error codes. Common issues include alternator failure or faulty wiring. For complex problems, consult a certified Subaru technician to avoid further damage.

To optimize performance, keep the battery charged and clean, ensure all software updates are installed, and avoid overloading the system with high-power aftermarket accessories. Use LED bulbs for lighting to reduce power consumption. Regularly inspect the alternator and wiring to ensure they are functioning correctly and efficiently.