Skip the auto shop - Our mechanics make house calls

Q: How do I replace the battery in my key?

asked by on

How do I replace the battery in my key?

A: Your key is electronic. That’s what allows ...

Your key is electronic. That’s what allows the remote to communicate with the various systems on the car. Like all batteries, it will eventually die and need to be replaced. It should last for several years between replacements, though. Here’s what to do if your remote isn’t working anymore:

  • Make sure you have a replacement battery. For a standard key and remote, you’ll need a CR2016. For a smart key system, you’ll need a CR1632.

Battery Replacement for a Standard Key

  1. Use a flathead screwdriver and pry the two halves of the key/remote apart.

  2. Flip the key over and locate the module. Remove it.

  3. Remove the old battery.

  4. Replace the new battery (make sure to have the + sign facing upwards).

  5. Close the battery and make sure the remote works.

Battery Replacement for a Smart Key

  1. Remove the mechanical key insert from the remote.

  2. Use a flathead screwdriver to pry apart the cover.

  3. Locate the battery. Remove it.

  4. Replace it with the new battery. Make sure the + sign is up.

  5. Close the remote.

  6. Make sure the remote works.

Tips

You may need to replace the remote battery if the remote stops working, or if you notice the range is reduced.

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

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: Engine turns over, doesn't start

Since this is a 1970 model, then you may have a problem with the ignition system or the carburetor not getting or giving fuel. The points in the distributor or the carburetor may be plugged. I recommend having a mechanic,...

Q: Cold weather makes the motor knock

This is a common problem with Hybrid Highlanders. Does the Check Engine Light illuminate when the knocking occurs? If so, Toyota released a technical service bulletin (TSB) related to cold start misfires. The associated TSB (T-SB-0210-11) covers the inspection, diagnosis...

Q: How do I turn the high beams?

High beams on your truck can become useful when driving at night when there are no street lamps or other cars around. The high beams can increase your range of vision. To turn on the high beams. Make sure...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...