Subaru BRZ Won't Start

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

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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 BRZ 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 BRZ

When faced with startup issues in your Subaru BRZ, it's crucial to adopt a methodical diagnostic approach. Begin by checking the battery, as a dead or weak battery is often the primary culprit behind starting problems. Ensure the battery is charged and inspect the battery cables for any signs of corrosion or damage that could impede electrical flow. If the battery appears functional, turn your attention to the alternator, which is responsible for maintaining battery charge while the engine runs; a malfunctioning alternator can leave your battery drained. Additionally, don’t overlook the key fob battery, as a dead fob can prevent the vehicle from starting altogether. If these initial checks do not resolve the issue, consider the starter motor. A sluggish starter may indicate deeper electrical problems or a failing starter that requires professional assessment. By following this structured approach, you can efficiently identify and address the root cause of your Subaru BRZ's startup issues, ensuring a smoother DIY troubleshooting experience.

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

When your Subaru BRZ won't start, it's essential to systematically check for common problems that could be causing the issue. Start with the battery, as a dead or weak battery is often the primary culprit. If the dashboard lights illuminate but the engine doesn't crank, you might be dealing with a faulty starter. In this case, listen for a clicking sound when you turn the key, which can indicate starter issues. Additionally, inspect the battery cables for corrosion or loose connections, as these can prevent the electrical current from reaching the starter. If you suspect the battery is weak, try jump-starting the vehicle to see if that resolves the issue. Don't overlook the possibility of a dead key fob battery, which can also prevent the car from starting. By methodically checking these components, you can effectively diagnose and address the reasons your Subaru BRZ isn't starting, allowing you to get back on the road with confidence.

Why is My Subaru BRZ Not Starting and What Should I Do?

When your Subaru BRZ refuses to start, it’s crucial to act promptly, as the underlying issues can escalate if left unaddressed. A dead battery is often the first suspect, and jump-starting the vehicle can provide a quick solution, but if the problem recurs, it may indicate a deeper issue with the alternator or starter. Ignoring these signs can lead to complete battery failure or starter burnout, leaving you stranded. Additionally, corrosion on battery terminals can disrupt electrical flow, and while cleaning them may resolve the issue temporarily, persistent corrosion could signal a failing battery. Furthermore, problems with the ignition switch can not only prevent your car from starting but also pose safety risks while driving. Therefore, it’s essential to diagnose and address these issues as soon as they arise to avoid costly repairs and ensure your vehicle remains safe and reliable on the road. If you’re unable to pinpoint the problem, seeking help from a qualified mechanic is advisable to prevent further complications.

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