2013 BMW 135i Won't Start

Troubleshooting Common Issues That Prevent Your 2013 BMW 135i from Starting and How to Resolve Them

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Reviewed by
Aisha
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 2013 BMW 135i 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 common problems that could cause a 2013 BMW 135i to not start?

When your 2013 BMW 135i refuses to start, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the first components to check is the battery; a dead or weak battery is often the culprit behind starting failures. If the battery is in good condition, the next step is to inspect the starter motor, as a malfunctioning starter can prevent the engine from turning over. Additionally, issues within the ignition system, such as a faulty key or ignition switch, can also hinder the starting process, even if the battery and starter are functioning properly. Don’t overlook the ground strap, as corrosion or damage can disrupt the electrical flow necessary for starting the vehicle. Lastly, consider the high-pressure fuel pump; if it’s not working correctly, it can lead to longer crank times or failure to start altogether. By systematically checking these components, you can identify and resolve the starting issues with your BMW 135i, ensuring a smoother driving experience.

How urgent is it to address the starting issue in a 2013 BMW 135i that won't start?

When dealing with a starting issue in a 2013 BMW 135i, the urgency of the situation cannot be overstated. Promptly addressing the problem is essential not only for the vehicle's reliability but also for your safety. A car that fails to start can lead to significant inconveniences, especially if it happens in critical situations or remote locations. Identifying the root cause of the issue—whether it be a battery failure, electrical system malfunction, or faulty ignition components—is crucial in determining how quickly you need to act. Conducting thorough diagnostic tests can help you pinpoint the exact problem, allowing for a more informed approach to repairs. Ignoring these symptoms may lead to further damage, resulting in more extensive and costly repairs down the line. Therefore, if basic troubleshooting does not resolve the issue, seeking professional assistance is advisable to prevent escalation and ensure your vehicle remains safe and functional. Taking timely action not only protects your investment but also enhances your overall driving experience.

What are the steps to diagnose a starting issue in a 2013 BMW 135i?

To effectively diagnose a starting issue in your 2013 BMW 135i, begin by determining whether the engine is cranking but failing to start or if it is completely unresponsive. This initial assessment will guide your troubleshooting process. Start with the battery, as a weak or dead battery is a common culprit; ensure it is fully charged and in good condition. Next, inspect the alternator to confirm it is functioning properly, as a faulty alternator can prevent the battery from charging effectively. If the battery and alternator are in good shape, turn your attention to the starter motor, which may need testing or replacement if it shows signs of failure. Additionally, check the ignition system and fuel system for any issues, as these can also contribute to starting problems. If the car still won’t start, conduct diagnostic tests on the fuel pressure and engine compression to rule out more serious mechanical issues. Finally, examine the electrical system, including fuses and wiring, to ensure there are no underlying electrical faults. By following this structured approach, you can systematically identify and resolve the starting issue, getting your BMW back on the road with confidence.

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