2018 BMW M6 Gran Coupe Won't Start

Resolve Starting Issues with Your 2018 BMW M6 Gran Coupe

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Reviewed by
Devin Cabugcal
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 2018 BMW M6 Gran Coupe 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 2018 BMW M6 Gran Coupe won't start?

When your 2018 BMW M6 Gran Coupe refuses to start, the first step is to check the battery, as a dead or weak battery is a common culprit. If the battery appears low, consider jump-starting the vehicle or testing it with a multimeter to confirm its voltage. Next, inspect the key fob to ensure it is functioning correctly; replacing the battery in the fob can often resolve starting issues. It's also essential to verify that the gear is in the correct position—make sure the car is in Park or Neutral for automatic transmissions, or in the appropriate gear for manuals. Additionally, check the fuel level to ensure there is enough gas in the tank, as running out of fuel can prevent the engine from starting. Pay attention to any warning lights on the dashboard, as these can provide valuable clues about underlying problems. Finally, if the issue persists, using a diagnostic scanner to check for fault codes can help identify specific issues within the vehicle's computer system. By following these steps, you can systematically troubleshoot the starting problem and potentially resolve it without professional assistance.

What are the common problems that could cause a 2018 BMW M6 Gran Coupe to not start?

When troubleshooting a 2018 BMW M6 Gran Coupe that won't start, it's essential to consider several common problems that could be at play. One of the first areas to check is the battery, as a dead or faulty battery is often the culprit behind starting issues. If the battery is drained, it may be due to an alternator failure or corroded terminals that prevent proper electrical flow. Next, examine the fuel system; a clogged fuel filter or a malfunctioning fuel pump can hinder fuel delivery, making it impossible for the engine to start. Additionally, the ignition system plays a critical role in starting the vehicle, so inspect components like the ignition switch and ignition coil for any faults. A malfunctioning starter motor can also prevent the engine from cranking, while worn-out spark plugs may lead to ignition problems. Lastly, consider the Engine Control Unit (ECU), as software glitches or malfunctions can disrupt the starting process. By systematically checking these areas, you can identify the underlying issue and take the necessary steps to get your BMW M6 Gran Coupe back on the road.

How urgent is it to address the starting issue in a 2018 BMW M6 Gran Coupe that won't start?

Addressing the starting issue in a 2018 BMW M6 Gran Coupe that won't start is of utmost urgency due to several critical factors. First and foremost, neglecting this problem can lead to further damage to the vehicle's electrical and mechanical systems, which may result in costly repairs down the line. Additionally, a car that fails to start can create safety hazards, particularly if the issue arises unexpectedly while driving, potentially putting the driver and passengers at risk. Moreover, dealing with a non-starting vehicle can leave you stranded in unsafe or inconvenient locations, making it essential to diagnose and resolve the issue promptly. By taking immediate action, you not only protect your investment but also ensure the safety and reliability of your vehicle, allowing you to drive with confidence.

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2018 BMW M6 Gran Coupe Won't Start: Causes & Repairs