Q: Plastic key in ignition

asked by on

A plastic key got stuck in the ignition switch. Tee car key still goes into the ignition, but the car won't start.

Hello, The metal key and plastic housing both need to be intact for the vehicle to start. The plastic housing holds a computer chip which sends a signal to the anti-theft system to start the vehicle. The metal key acts as an antenna to relay the information from the chip to the anti-theft system. If the key becomes broken or stuck into the ignition, the signal to the anti-theft system could be disrupted, thus disabling a vehicle from starting. At times the key can be extracted by the partially disassembling the lock cylinder by a locksmith or certified technician. I would recommend having a trained technician, like whom our company provides, inspect the ignition system for faults and to attempt removing the key. If the key cylinder is damaged, a mechanic can replace the cylinder so you could have your car running in not time.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Plastic key in ignition

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car won't start with new battery after sitting a year

Hello. If the vehicle only starts with the jumper wire method, then it is likely its an issue with the ignition switch itself. It's possible that the switch itself is bad or the key has a become bad. Try starting...

Q: I switched my steering lock and now my key won't work on my car. What should I do?

Whenever the keys or ignition lock are replaced on Mercedes models equipped with the smart key, the dealership must reprogram the ignition and keys together. Unfortunately, the vehicle may have to be towed to your local Mercedes dealership along with...

Q: Battery replaced and ABS light on

The vehicle needs to be inspected and diagnosed for intermittent connection issues at all the computer modules and the connections in between them. Have a mechanic check each pin and socket for any corrosion and pin fitment to make sure...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...