2021 BMW I3s Won't Start

Troubleshooting Common Issues That Prevent Your 2021 BMW i3s from Starting and How to Resolve Them

Find Repair Location
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 2021 BMW i3s 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 2021 BMW i3s won't start?

When your 2021 BMW i3s refuses to start, the first step is to check the battery, as a weak or dead battery is a common culprit. Ensure the battery terminals are clean and securely connected. Next, inspect the key fob; a depleted battery in the fob can prevent the vehicle from recognizing it, so try using a spare if available. It's also essential to verify that the gear selector is in the correct position, typically Park or Neutral, as the car may not start otherwise. Pay attention to any warning lights or error messages on the dashboard, as these can provide clues about underlying issues. If the battery seems weak, consider jump-starting the vehicle with jumper cables and another car. Additionally, inspect the fuses for any that may have blown, as this can also lead to starting problems. Finally, consulting the owner's manual can offer specific troubleshooting guidance tailored to your vehicle. By following these steps, you can systematically diagnose and potentially resolve the starting issue with your BMW i3s.

What are the common problems that could cause a 2021 BMW i3s to not start?

When a 2021 BMW i3s fails to start, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the primary culprits is often the battery; a dead or weak battery can prevent the vehicle from starting, so checking the battery's charge and connections is a good first step. If the battery is in good condition, the next area to investigate is the starter motor, as a malfunctioning starter may not crank the engine properly. Additionally, issues within the fuel system, such as a clogged fuel filter or a faulty fuel pump, can hinder the engine's ability to start. It's also essential to consider the ignition system; problems with components like the ignition switch or ignition coil can disrupt the starting process. Worn-out spark plugs are another common issue, as they play a crucial role in igniting the fuel-air mixture. Lastly, the Electronic Control Module (ECM) can sometimes be the source of starting problems, as it manages various engine functions. By systematically checking these areas, DIYers can effectively troubleshoot and resolve starting issues with their BMW i3s.

How urgent is it to address the starting issue in a 2021 BMW i3s?

When dealing with starting issues in a 2021 BMW i3s, the urgency of addressing the problem cannot be overstated. Ignoring symptoms such as a complete failure to start or the presence of warning lights can lead to significant safety risks and potential damage to the vehicle. If your i3s fails to start, it is essential to act quickly to avoid being stranded or causing further complications that could escalate repair costs. Even intermittent starting problems should not be overlooked, as they can indicate underlying issues that may worsen over time. Seeking a professional diagnosis is advisable, as a qualified mechanic can pinpoint the root cause and provide insight into the urgency of the repair. Additionally, staying on top of regular maintenance can help prevent these issues from arising in the first place, ensuring your vehicle remains reliable and safe. Ultimately, addressing starting issues promptly is crucial for maintaining the performance and safety of your BMW i3s.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.