2025 Tesla Model Y Battery Size (BCI Group and CCA)

Which Tesla Model Y model years does this cover?

These battery specifications apply to every Tesla Model Y built from 2025 through 2025 — the 2nd generation ('Juniper' refresh), compact electric crossover suv (refreshed body, light-bar front/rear). Nothing in this specification changes between those model years. Pick your year for the engines it offered, what changed that year, and the problems recorded against it.

What changed during the 2025 Tesla Model Y

• 2025US Juniper deliveries began March 2025 with the loaded Launch Series (LR AWD); standard Long Range AWD and RWD followed mid-year. Note: some legacy-body cars were also sold as early 2025 models. Check the front end (full-width light bar = Juniper). Performance (21-in Arachnid 2.0, ~460 hp) and the decontented Standard trim arrived October 2025 as 2026 models.

What size battery does a 2025 Tesla Model Y take?

BCI group Tesla proprietary ~15.5–16V lithium-ion low-voltage battery. Group size is a physical dimension and terminal-position standard, so a battery from a different group may not clamp down or may put the terminals on the wrong side.

Where is the battery on a 2025 Tesla Model Y?

Low-voltage battery under front trunk area / behind front apron (Tesla service access).

Does a 2025 Tesla Model Y need the battery registered after replacement?

This is the low-voltage accessory battery, not the drive pack. 2025 Juniper builds continue the Tesla-proprietary lithium-ion low-voltage battery (later 2026-model-year builds reportedly moved to a 12.8V LFP unit). It is designed to last the life of the car, is monitored by the vehicle, and is not a DIY or parts-store replacement, Tesla service handles it. No lead-acid option exists on this generation.