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?

A: If your remote key stops working, it is lik...

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.


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

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Key FOB has stopped working

You can get one from an aftermarket source but it will still have to go to the dealer to have it programmed if you cannot get a local mechanic to program it with a factory programmer. These programmers are only...

Q: Keyless ignition not working.

Hello. This is a common problem on your car. It is so common that Volkswagen has a technical bulletin for this. The fix is replacing the Start Module. This is best left done to the dealer as it will need...

Q: Toyota Venza 2000 idles at high RPMs

Watch my video "how to fix a car that idles poorly." A lot of times, it is that simple. You take the air duct work off that goes into the throttle, get the rubber duct off, get some spray throttle...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.