Tesla Model Y key fob battery replacement

2 min read

Tesla model y key fob

Like all car keys, the battery in the Tesla Model Y fob will run out. At this point, it must be disposed of legally and safely and replaced with a new one.
The key fob is one way to access your Model Y, but far from the only option. Don’t worry if you think you’re locked out – you can still get in.
This page is a quick guide explaining how to access and replace the CR2032 button battery in the Model Y key fob.
Safety notice: you must keep the CR2032 battery well away from anything that might swallow it. It’s likely to cause fatal internal chemical burns.
You’ll find more detailed information in the Model Y owner’s manual that came with your car.

The Tesla Model Y key fob

Tesla is known for doing things differently (for better or for worse). The key fob is just one such example.
It’s an optional extra. If you’ve already got one, you likely went through the process of ordering it in the selections menu.
Instead of the key fob, owners are encouraged to use their phone as a key or a key card (to be kept in a wallet).
The fob itself is also unique. Shaped like a Tesla, it stands out against the crowd.

  • Single-click the roof to lock all the doors and both trunks.
    • This might only work if they’re all closed properly.
  • Double-click the roof to unlock all doors and both trunks.
  • Double-click the front trunk to unlatch it.
  • Double-click the rear trunk to unlatch it.

Signs of a dead battery in the Tesla Model Y key fob

Here are a few signs of the key battery losing charge. These apply to all cars, not just EVs.

  • Buttons (e.g., LOCK and UNLOCK) don’t work.
    • If they only work when you’re close, this might indicate a deteriorating key battery.
  • The door doesn’t open with keyless technology (or struggles).

Tesla only expects the key fob battery to last up to 12 months. That’s not as long as most other competitors. Don’t be surprised if you’re changing it more often than expected.

How to replace the Tesla Model Y key fob battery

These instructions for changing the Tesla Model Y key fob battery are based on those found in the owner’s manual. Read it yourself for a detailed understanding.

  1. Turn the key fob upside down (buttons facing downward) and place it on a soft surface.
  2. Use a tool such as a small flathead screwdriver to release the battery cover.
    • Push it into the small gap at the ‘rear’ of the Tesla car-shaped fob.
    • Use leverage to pry the cover off.
  3. Lift the battery out of the key.
    • Put it in a safe location, away from children, animals, or anyone who might ingest it. These button batteries are often fatal if swallowed.
    • Keep it away from heat, water, and electrical sources, too.
    • You must dispose of batteries as per your local regulations – even ones this small. They’re incredibly toxic to the environment.
  4. Insert the new battery.
    • Use the correct type (CR2032). You’ll find them at any local store, such as Walmart.
    • The + side should face up.
    • Don’t touch the flat parts of the new battery. You should hold it at the edges only. Otherwise, it might affect the battery life and
    • performance.
  5. Realign the key battery cover (at an angle). Then, click it back into place.

It’s worth pushing the LOCK and UNLOCK buttons a few times to ensure it’s working.
If you’re still experiencing problems, it’s worth engaging a Tesla dealer/partner.

How to access and start your Model Y if the key battery is dead

If the key battery is dead, no worries. You can still access your Model Y.
Use one of the following other keys if you can:

  • Phone Key
  • Key Card

If you don’t have access to either of these, scan the fob on the card reader on the driver’s door pillar. Essentially, treat it as a key card.
You should then be able to access your vehicle. Start it within two minutes of getting in.

Read your Tesla Model Y owner’s manual for more detailed information on your fob. You’ll find a PDF version below.

Tesla model y key fob

By Ben Kitchen Ben is a qualified car mechanic with experience working in the industry. He now works as an automotive author, writing about all things vehicle-related. He’s excited about the potential held by electric cars of all shapes, sizes, and types.

Ben Kitchen Ben is a qualified car mechanic with experience working in the industry. He now works as an automotive author, writing about all things vehicle-related. He’s excited about the potential held by electric cars of all shapes, sizes, and types.

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