2018 BMW M3 Key Won't Turn

Troubleshooting Common Issues When Your 2018 BMW M3 Key Won't Turn and How to Resolve Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
35% chance it's the
Binding Steering Column/Lock
0%
27% chance it's the
Ignition Switch
0%
20% chance it's the
Ignition Key
0%
18% chance it's
Something else
The most common reasons a 2018 BMW M3 key won't turn are a binding steering column/lock, an ignition switch issue, or a problem with the ignition key.
  • Binding Steering Column/Lock: A binding steering column or lock can occur due to a worn or damaged steering column assembly or issues with the ignition lock mechanism.
  • Ignition Switch: A faulty ignition switch can prevent the engine from starting or cause intermittent electrical issues, affecting the vehicle's ability to run properly.
  • Ignition Key: A worn or damaged ignition key or ignition cylinder can prevent the key from turning, 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 steps to diagnose why the key won't turn in a 2018 BMW M3?

When diagnosing why the key won't turn in a 2018 BMW M3, it's essential to adopt a systematic approach that begins with the simplest solutions before moving on to more complex issues. Start by examining the key itself for any signs of damage or excessive wear, as a compromised key can prevent proper ignition. Next, check the steering wheel; sometimes, the steering lock can engage, making it difficult to turn the key. If the steering wheel is not the issue, ensure that the car's battery is functioning correctly, as a weak battery can disrupt electronic systems, including the ignition. Additionally, confirm that the gear shift is in the correct position, typically Park or Neutral, as this is a requirement for many vehicles to allow the key to turn. If these initial checks do not resolve the problem, inspect the ignition cylinder for any signs of jamming or malfunction, which may necessitate professional intervention. Lastly, consider the lock cylinder and the vehicle's electronic systems, particularly if your BMW features keyless entry; checking related fuses can help identify any electronic faults. By following this diagnostic approach, you can effectively troubleshoot the issue and determine the necessary steps to resolve it.

What are the common problems that could cause the key to not turn in the ignition of a 2018 BMW M3?

When faced with the frustrating issue of a key that won't turn in the ignition of a 2018 BMW M3, it's essential to understand the common problems that could be at play. One frequent culprit is the steering wheel lock mechanism, which can engage and prevent the key from turning. To troubleshoot this, gently wiggle the steering wheel while attempting to turn the key, as this may disengage the lock. Additionally, inspect the key itself for any signs of wear or damage, as a worn key can hinder ignition engagement; using a spare key can help determine if this is the issue. Another possibility is a faulty ignition cylinder, which may require professional inspection if the key fails to engage properly. It's also worth checking the battery in the key fob, as a dead or low battery can prevent the key from turning; replacing the battery is a simple fix that can save time and hassle. Lastly, ensure that the steering column is not locked, as this can also obstruct the key's movement. By systematically addressing these potential issues, you can effectively troubleshoot and resolve the problem of a key that won't turn in your BMW's ignition.

How urgent is it to address the issue of the key not turning in a 2018 BMW M3?

Addressing the issue of a key not turning in a 2018 BMW M3 is crucial for several reasons. First and foremost, a malfunctioning key can prevent you from starting your vehicle, leading to significant disruptions in your daily life and potentially causing you to miss important appointments. Moreover, if the problem escalates, you risk being stranded, which could necessitate costly towing services and additional assistance. Ignoring this issue may also indicate deeper problems within the ignition system or key mechanism, which could worsen over time and lead to more extensive repairs. Additionally, in emergency situations, a key that won’t turn can pose serious safety risks, as it may hinder your ability to start the vehicle quickly. Therefore, it is advisable to address this issue promptly to avoid inconvenience, ensure your safety, and prevent further damage to your BMW M3.

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