Can a Broken or Worn Car Key Be Repaired?

A cracked case, a bent blade or a key that has worn smooth does not always mean a new key. Often the part that matters most, the chip inside, is fine, and only the blade or the shell needs attention. Here is what can be repaired on a car key in Hamilton and the Waikato, what needs replacing, and how to tell which you have.

What can usually be repaired

A cracked or broken plastic shell. The chip and electronics inside are often fine. The shell can be replaced and the working parts moved across, so you keep the same key rather than buying a new one.

A worn blade. A key that sticks, turns roughly or has started to fail is usually worn rather than faulty. A new blade can be cut to your vehicle's code, which gives a better result than copying from the worn one.

A bent blade. A slightly bent blade can sometimes be straightened, but it is a risk, because metal that has been bent can snap in the lock. Cutting a fresh blade is usually the safer fix.

What usually needs replacing

A damaged or dead chip. If the chip is cracked, water-damaged or has failed, the key may turn but not start the car. That needs a new key programmed to the vehicle.

A fob with failed electronics. If the buttons stopped working after water or a drop, see repair or replace a key fob for how to decide.

If the key has snapped in the lock

Do not push or twist the remaining piece, and do not reach for superglue or pliers. Removing a broken key from a door or ignition is a separate job, covered by our broken key extraction service, and doing it cleanly is what saves the lock.

How to decide: repair or replace

Ask three questions. Does the key still start the car? If it does, the chip is probably fine and a repair is worth it. Is there a spare? If there is, now is the time to cut another before the damaged one fails completely. Is the damage only to the blade or shell? If so, repair it; if the electronics are damaged, replace the key. Our broken car key repair page covers the options.

What it costs

It depends on what is damaged. A plain metal key is $10–$20, a transponder key cut and coded is $120–$180, and a smart or proximity key is $280–$600, so replacing a key can cost far more than repairing a blade or shell. Car remote repair runs from $49.90 to $120 depending on the fault. Ring with the make, model and year for a firm price.

Getting it fixed in Hamilton

We repair and replace damaged car keys at your vehicle across Hamilton, Cambridge and the wider Waikato, usually without you going anywhere. Send the details through with the make, model and year, and a photo of the damage if you can.