2015 Subaru BRZ Won't Start

Common Causes for Your 2015 Subaru BRZ Not Starting and How to Resolve Them

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Reviewed by
Andrew Hajjar
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 2015 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 due to insufficient power supply.
  • Alternator: A failing alternator can result in insufficient electrical power to the vehicle, 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.

What are the initial diagnostic steps to take when a 2015 Subaru BRZ won't start?

When faced with a 2015 Subaru BRZ that won't start, it's essential to adopt a systematic diagnostic approach to identify the underlying issue. Begin by checking the battery, as a weak or dead battery is often the primary culprit behind starting problems. If you hear a clicking sound when attempting to start the vehicle, this is a strong indicator that the battery may need a jump or replacement. Next, inspect the vehicle for any signs of rodent damage, as chewed wires can disrupt electrical connections and prevent the car from starting. If the battery appears functional, but the car still won't start, the ignition switch may be at fault; ensure that the dashboard lights illuminate when you turn the key, as this can help confirm whether power is reaching the starter motor. Additionally, pay attention to any warning lights on the dashboard, as these can provide critical clues regarding the battery, alternator, or other components that may be malfunctioning. For a more thorough analysis, consider using a diagnostic tool to connect to the vehicle's onboard computer, which can reveal specific error codes related to the starting issue. Finally, consulting diagnostic charts can guide you through a structured troubleshooting process, allowing you to systematically eliminate potential problems and arrive at a solution. By following these steps, you can effectively diagnose and address the reasons your Subaru BRZ won't start, potentially saving time and money on repairs.

What are the common problems that could cause a 2015 Subaru BRZ to not start?

When your 2015 Subaru BRZ refuses to start, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the most frequent culprits is a dead or weak 12v battery, which can prevent the starter from engaging properly. If you hear a clicking noise when attempting to start the vehicle, this often indicates that the battery lacks sufficient power. In such cases, jump-starting the car with jumper cables from another vehicle can provide a quick solution. However, if the battery is old or damaged, it may need to be replaced entirely. Another issue to consider is a cracked flex plate, which can lead to a no crank or no start condition. This problem typically requires a more in-depth inspection and possibly professional assistance. By being aware of these common issues, you can take the necessary steps to diagnose and potentially fix the starting problems with your Subaru BRZ, ensuring it runs smoothly and reliably.

How urgent is it to diagnose and fix the starting issue in a 2015 Subaru BRZ that won't start?

When your 2015 Subaru BRZ refuses to start, the urgency to diagnose and fix the issue cannot be overstated. Delaying repairs can lead to further damage, as underlying problems may escalate, resulting in more extensive and costly repairs down the line. Additionally, a non-starting vehicle can leave you stranded in unsafe or inconvenient situations, which not only disrupts your day but can also pose serious safety risks, especially in emergencies where reliable transportation is crucial. Utilizing a diagnostic chart can streamline the troubleshooting process, helping you pinpoint the root cause efficiently. One of the most common culprits for starting issues in the BRZ is a weak battery, making it essential to check battery health as part of your initial assessment. By addressing the starting problem promptly, you not only safeguard your vehicle's integrity but also ensure your safety and peace of mind on the road.

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