Subaru Impreza Won't Start

Common Causes for Your Subaru Impreza Not Starting and How to Resolve Them

Find Repair Location
Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
38% chance it's the
Battery
0%
27% chance it's the
Alternator
0%
20% chance it's the
Starter
0%
15% chance it's
Something else
The most common reasons a Subaru Impreza won't start are a dead battery, an alternator problem, or failed starter.
  • Battery: A weak or failing battery can result in difficulty starting the engine and electrical system malfunctions.
  • Alternator: A failing alternator can result in insufficient electrical power, leading to battery drain and electrical system malfunctions.
  • Starter: A faulty starter motor or a weak battery can prevent the engine from cranking properly, leading to starting issues.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

Troubleshooting Startup Issues in a Subaru Impreza

When faced with startup issues in your Subaru Impreza, a methodical diagnostic approach can save time and frustration. Begin by checking the battery, as a weak or corroded connection is often the simplest culprit. Ensure the terminals are clean and the battery is fully charged. If the battery checks out, move on to the starter motor; listen for any clicking sounds when turning the key, which may indicate a malfunction. Next, inspect the fuel system, as proper fuel delivery is crucial for starting. Look for clogged filters or a faulty fuel pump that could hinder performance. If the engine cranks but fails to start, consider ignition issues; testing the spark plugs and ignition coils can reveal if they are functioning correctly. Finally, if these steps do not resolve the issue, it may be necessary to utilize on-board diagnostics tools to identify any error codes that could point to more complex problems. This structured approach not only helps in pinpointing the issue but also empowers you to tackle repairs with confidence.

What to Check When Your Subaru Impreza Won't Start?

When your Subaru Impreza refuses to start, it's essential to systematically diagnose the issue by examining several key components. Start with the battery, as a dead or weak battery is often the primary reason for starting failures. Ensure the battery is charged and capable of holding a charge; if not, consider replacing it. Next, inspect the battery cables for any signs of damage or corrosion, as these can disrupt the electrical flow necessary for starting the engine. Additionally, if your vehicle uses a key fob, check the fob's battery; a depleted battery can prevent the ignition system from engaging. If these components check out, turn your attention to the ignition system and starter. A malfunctioning ignition key or a faulty starter can also lead to starting issues, requiring either repair or replacement. Lastly, don't overlook the alternator, which is crucial for charging the battery while the engine runs; a defective alternator can leave your battery drained. By methodically checking these areas, you can effectively troubleshoot and resolve the starting problems with your Subaru Impreza.

Why is My Subaru Impreza Not Starting?

When your Subaru Impreza refuses to start, it’s crucial to address the issue promptly to avoid potential safety hazards and costly repairs. Ignoring symptoms like a weak battery or malfunctioning starter can lead to more severe problems, such as complete electrical failure or damage to the ignition system. A drained battery, often caused by corrosion on terminals or a dead key fob battery, can leave you stranded and may require immediate attention to restore functionality. Additionally, issues with the fuel delivery system or a faulty starter motor can escalate if not diagnosed quickly, potentially leading to more extensive damage. By taking the time to troubleshoot these common causes, you not only enhance your vehicle's reliability but also ensure your safety on the road. If you’re unsure about the diagnosis, consulting a professional technician can provide peace of mind and help you avoid further complications.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.