2024–2025 Tesla Model 3 Battery Size (BCI Group and CCA)

Which Tesla Model 3 model years does this cover?

These battery specifications apply to every Tesla Model 3 built from 2024 through 2025 — the 2nd generation ('Highland' refresh), compact ev sedan (refreshed body, chassis, and interior). 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 2024–2025 Tesla Model 3

• 2024Highland launch (US orders Jan 2024): new fascias, ride-tuned suspension, quieter cabin with acoustic glass, stalk-less interior (turn signals on wheel buttons), ventilated front seats, rear touchscreen. RWD and Long Range AWD at launch; Performance ('Ludicrous') arrived April 2024 with 510 hp and staggered 20-in wheels
• 2025Long Range RWD (363 mi) joins the lineup; front bumper camera and other running changes appear on later builds

What size battery does a 2024–2025 Tesla Model 3 take?

BCI group 16V Li-ion low-voltage battery (Tesla proprietary, 15.5 V / 6.9 Ah). 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 2024–2025 Tesla Model 3?

Front compartment, behind the cabin-intake trim panel.

Does a 2024–2025 Tesla Model 3 need the battery registered after replacement?

All Highland cars use the 16V Li-ion low-voltage battery (CATL prismatic cells), no lead-acid option, no BCI group size, and Tesla says it is designed to last the life of the vehicle. Not a routine wear item; replacement is by Tesla (mobile) service. The high-voltage traction pack is separate.