2019 BMW M4 Won't Start

Common Causes for Your 2019 BMW M4 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 2019 BMW M4 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.

What are the initial diagnostic steps to take when a 2019 BMW M4 won't start?

When your 2019 BMW M4 refuses to start, it's essential to adopt a methodical diagnostic approach to identify the root cause. Begin by checking the battery, as a dead or low charge is a common culprit; using a multimeter can help you assess its voltage. Next, inspect the key fob to ensure it’s functioning correctly, as a weak battery in the fob can prevent the car from recognizing it. Confirm that the gear is in the correct position, typically Park or Neutral for automatic transmissions, as this is crucial for starting. Additionally, verify that there is sufficient fuel in the tank, as an empty tank can often be overlooked. It’s also wise to examine the fuses related to the starting system for any that may be blown. If these initial checks do not resolve the issue, consider using a diagnostic scanner to look for error codes that could indicate specific problems. Lastly, inspect the starter motor for signs of failure and pay attention to any warning lights on the dashboard, as they can provide valuable clues. By following this structured approach, you can effectively narrow down the potential causes of your M4's starting issues and take the necessary steps to fix them.

What are the common problems that could cause a 2019 BMW M4 to not start?

When troubleshooting a 2019 BMW M4 that won't start, it's essential to consider several common issues that could be at play. One of the first areas to check is the battery, as a weak or dead battery is often the culprit behind starting failures. If the battery is old or not holding a charge, it may need replacement. Next, examine the fuel system; a clogged fuel filter or a malfunctioning fuel pump can disrupt fuel delivery, preventing the engine from starting. Additionally, the ignition system plays a critical role in starting the vehicle, so inspect components like spark plugs and ignition coils for any signs of wear or failure. The starter motor is another key component; if it’s not functioning correctly, the engine won’t crank. Furthermore, issues with the Engine Control Unit (ECU) can lead to starting problems, as this unit manages various engine functions. Lastly, don’t overlook the security system; a faulty immobilizer or key fob can inadvertently prevent the car from starting. By systematically checking these areas, you can effectively diagnose and address the starting issues with your BMW M4.

How urgent is it to address the starting issue in a 2019 BMW M4?

Addressing a starting issue in your 2019 BMW M4 is not just a matter of convenience; it is crucial for the long-term health of your vehicle. Ignoring this problem can lead to more severe complications, such as engine damage or electrical failures, which can result in expensive repairs down the line. Additionally, a starting issue often indicates underlying problems that may escalate if left unattended, potentially leaving you stranded when you need your car the most. For those considering a DIY approach, it is essential to diagnose the issue accurately and understand that timely intervention can save you from more significant headaches in the future. Therefore, if you notice any starting difficulties, it is advisable to act quickly, either by troubleshooting the problem yourself or seeking professional help to ensure your BMW M4 remains reliable and safe on the road.

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