Skip the auto shop - Our mechanics make house calls

Q: How do I change the key battery?

asked by on

How do I change the key battery?

If your remote key stops working, it is likely because the battery has died. When this happens, you will need to replace the battery, which you can do with a few steps:

  1. Remove the mechanical key from the key fob.

  2. Use a flathead screwdriver to pop the key cover off.

  3. Carefully remove the battery. Some keys will have a module, which will have to be removed and opened to access the battery.

  4. Replace with a new battery, with the positive side facing upwards.

  5. Put the cover back on.

Tip

If your vehicle has the smart key system, you should use a CR1632 battery. If your vehicle has the Type A system, you should use a CR2025 battery. If your vehicle has the Type B system, you should use a CR2016 battery.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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
  1. Home
  2. Questions
  3. How do I change the key battery?

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: Random no-start. Turning key and no response, I turn the key back off and turn it again and the car starts

Hey there. This is a sign of a faulty or failing ignition switch. When this begins to fail, this is usually a sign of the contacts inside the switch wearing out. When you put your key in the ignition and...

Q: Was a loud tapping noise while accelerating, and then put in new alternator and got oil change, woke up this morning and want st

You need to look at the oil pressure sending unit just above the oil filter to see if it got damaged when changing the oil filter. If it is the sending unit, then replace it since the fuel pressure will...

Q: How do I check the tire pressure?

While checking the tire wear on your car is important, it’s equally as vital that you keep an eye on the tire pressure. While your vehicle is equipped with a tire pressure monitoring system (TPMS), it cannot replace physically checking...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...