How to Open Your 2001 Hyundai Sonata Key Fob & Change Battery

How to Open Your 2001 Hyundai Sonata Key Fob & Change Battery

If your Sonata key fob isn't open doors properly, the battery surely needs to be changed. It's not complicated to replace the battery in your remote key fob DIY. All you need is outlined in this post.

What is the battery key fob require

Replacing battery in key fob require one CR2032 battery, phillips head screwdriver and flat head screwdriver. Prepare these materials and tools before opening and make sure to match the type of your fob’s batteries.
  • phillips head screwdriver
  • 1xCR2032 battery
  • flat head screwdriver

Simple steps to replace the battery in your Sonata's keyless entry remote

Inside of your remote key fob installed small button battery. Remove screw on the back of the remote key fob. Spin the key fob over and look for at least one screw holding in the plastic.

Delicately try to disassemble your key with hands or flat head screwdriver. Remove 1 CR2032 battery with flat head screwdriver.

Replace old battery with fresh one CR2032. Be sure to connect the battery the right way around in a circuit. Your keyless entry remote will not work if you connect battery wrong way.

After the new battery installed, verify key fob functionality by pressing buttons. If all functions works, assemble your fob’s shell in reverse order.

The last thing to do is put your cover back on fob. Carefully try to assemble the two halves together by hands from top to bottom. Inspect your keyless entry remote shell for gaps. If it is not firmly closed try to repeat last step. Screw fastener in the back of the remote key fob.

Video of key disassembly

How To Replace Hyundai Sonata Key Fob Battery 2001

Still not working? Buy new one


Remote key fob of Hyundai Sonata require 1xCR2032 batteries. Most CR2032 batteries are under $6 depending on the brand, type and size packaging you buy. You can take old battery to the store, to be sure.

Often, after key fob battery change, reprogramming not required. Key fob reprogramming procedure often described in user's manual of your vehicle.

Yes, you can replace battery in your 2001 Hyundai Sonata keyless entry remote yourself. Most difficult part is to open fob’s case. It's pretty simple with our guide.

The cost to change the battery inside key fob is from $30 to as high as $500 depending on the make and the service pricing.

Remote key fob batteries in Hyundai Sonata should be replaced once in 3-4 years, although this will vary based on their amount of use and battery quality. If your keyless entry remote decreased signal strength, you should change batteries before it stop close doors and make problems for you.

If your car fob's battery more than 4 years old, has low key battery indicator on dashboard, need multiple clicks to unlock or lock doors or signal strength reduced, in most cases battery replace in key fob needed. Currently installed battery is weak with a high probability, but if it's not fix, keyless entry remote replace or repair needed.
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Fob Compatibility:

  2. Models: 2001-2005 Hyundai Sonata