Tesla Model 3 · 2017–2025
Tesla Model 3 Key Fob Battery Type and Replacement
The specification is not the same across every year we cover, the table below shows exactly where it changes.
Last verified
Has the Tesla Model 3 key fob battery specification changed by year?
| Model years | Fob battery |
|---|---|
| 2024–2025 | CR2032 (optional accessory key fob); key card and phone key have no battery |
| 2017–2023 | CR2032 (optional accessory key fob). The standard key card and phone key have no battery to replace. |
Each row links to the full specification for that generation, including trim-by-trim breakdowns and the part numbers. Where engines within a generation differ, that page separates them.
Full specifications by generation
The key fob battery on a Tesla Model 3 is set by its generation, not its model year, so each generation has one page carrying the complete figures, part numbers and fitment notes for every year it covers.
Tesla Model 3 key fob battery: common questions
What battery does the Tesla Model 3 key fob take?
- A single CR2032 (optional accessory key fob); key card and phone key have no battery coin cell.
Can you use a CR2032 instead of a CR2025 in a Tesla Model 3 key fob?
- This fob takes a CR2032 (optional accessory key fob); key card and phone key have no battery, so start there. The two cells share a 20 mm diameter but differ in thickness, and the thicker one does not always seat in a housing built for the thinner.
How do you open a Tesla Model 3 key fob?
- Slide out the mechanical emergency key first, which usually releases a catch, then part the halves with a plastic pry tool or a coin wrapped in tape. A screwdriver will mark the case and can crack the seam.
Sources
- Tesla Support, Vehicle Maintenance (Model 3 intervals: cabin filter 2 yr, brake fluid 4 yr, rotation 6,250 mi, no desiccant for heat-pump cars)
- Wheel-Size.com, 2024 Tesla Model 3 OE fitments and 42 psi pressures
- Mavis, 2025 Model 3 Performance staggered OE sizes (235/35R20 front, 275/30R20 rear)
- NHTSA Part 573 report, recall 25V-002 (vehicle computer / rearview camera)
- NHTSA Part 573 report, recall 24V-376 (seat belt reminder)
- NHTSA Part 573 report, recall 24V-935 (TPMS warning light)
- Tesla Shop. Model 3 wiper blade (fits all Model 3 years)
- Tesla DIY Guide, Replacing Cabin Filters (procedure shared with pre-Highland cars)
- Wikipedia, Tesla Model 3 (Highland launch timing, curb weights, EPA ranges)
Find your exact Model 3
Jump to a model year for the engines it offered, what changed, and the problems documented against it: