7 Common Car Key Problems and How to Fix Them

10 August 2025

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Car keys may be small, but when they fail, they can bring your day to a complete standstill. From broken keys in the ignition to unresponsive remotes, key problems can strike at the most inconvenient times. This guide explores the most common car key issues in London and how you can resolve them — including when it’s best to call a professional mobile car locksmith instead of attempting a DIY fix.

Lost Car Keys

It happens to everyone. Misplacing your car keys can lead to a frantic search and, sometimes, missed appointments. While retracing your steps is the first option, a car key replacement London service can cut and program a new key on the spot, eliminating the wait and hassle of going through a dealership.

Broken or Snapped Keys

Keys can weaken over time, especially if they’re frequently dropped or twisted in a stiff lock. If your key snaps in the ignition or door, avoid trying to remove it yourself — you could damage the lock further. A broken key extraction service can remove the piece safely and even cut a replacement key immediately.

Remote Key Fob Not Working

A non-functional remote can be caused by a dead battery, worn buttons, or internal damage. While replacing the battery is easy, more serious issues require a locksmith who can open the fob, replace damaged components, or program a new one if needed.

Key Won’t Turn in the Ignition

If your key doesn’t turn, it could be a worn key blade, dirt in the ignition, or a damaged ignition cylinder. Cleaning might help in some cases, but a locksmith can diagnose the issue and either cut a more accurate key or repair the ignition.

Transponder Key Not Recognised

Modern cars often have transponder chips inside the key that communicate with the car’s immobiliser. If the car fails to recognise the chip, the engine won’t start. A locksmith can reprogram the transponder or provide a new chip to restore functionality.

Stuck or Damaged Car Door Lock

Sometimes the problem isn’t the key at all but the lock. Dirt, rust, or internal wear can stop it from turning. Lubricants may provide a temporary fix, but professional servicing ensures the lock works smoothly without risk of it failing again.

Spare Key Needs Cutting or Programming

Having only one car key is risky — losing it leaves you stranded. A locksmith can cut and program spare keys, ensuring you’re never left without access to your car. It’s one of the most affordable ways to avoid future headaches.

When to Call a Professional Locksmith

While some key problems have simple fixes, others require specialist tools and expertise. Attempting to force a key, pry out a broken blade, or guess at programming codes can cause expensive damage. Professional locksmiths bring the training and equipment to resolve the problem quickly, safely, and often for less than a dealership.

Conclusion

Car key problems are frustrating, but they don’t have to ruin your day. Knowing the common issues and when to call for help can save you time and money. The next time you face a lockout, a broken key, or a programming glitch, remember that a reliable mobile car locksmith in London can have you back on the road in no time.

About J&M Car Locksmiths

J&M Car Locksmiths provides 24/7 mobile locksmith services across London and nearby towns. From emergency lockouts to precision key cutting and programming, our team is equipped to solve your problem on-site. Call +44 771 050 85 98 or visit our Contact Us page to request assistance.