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.
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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.
- Turn the key fob upside down (buttons facing downward) and place it on a soft surface.
- 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.
- 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.
- 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
- 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.
What kind of battery does a Tesla key fob take?
Tesla key fobs typically use a standard CR2032 coin cell battery. This is a common battery type used in many electronic devices, including key fobs. It’s a readily available battery and can be found at most stores that sell batteries.
How do you change the battery in a Tesla Model Y key fob?
To change the battery in a Tesla Model Y key fob, follow these general steps:
- Locate the small groove or slot along the edge of the key fob.
- Insert a flat, thin tool like a small screwdriver or a coin into the groove and gently twist or pry to open the key fob.
- Inside, you’ll find the CR2032 battery. Carefully remove the old battery.
- Insert a new CR2032 battery with the positive (+) side facing up.
- Close the key fob by snapping the two halves back together.
Be sure to dispose of the old battery properly and securely reseal the key fob to prevent damage or water ingress.
How much is a replacement battery for a Tesla Model Y key fob?
The cost of a replacement CR2032 battery for a Tesla Model Y key fob is relatively inexpensive, typically ranging from a few dollars to a few Euros or your local currency. The price may vary depending on where you purchase the battery, such as a convenience store, electronics store, or online retailer. It’s a common and widely available battery type, so it should not be costly.
How long does a Tesla Model Y key fob battery last?
The battery life of a Tesla Model Y key fob can vary depending on usage, but the CR2032 battery typically lasts for several months to a couple of years before needing replacement. Frequent use of the key fob (e.g., locking and unlocking the vehicle frequently) can shorten the battery life. It’s a good practice to carry a spare battery or keep an eye on the key fob’s performance to ensure it works reliably.