How to Replace Battery on a 2015 Toyota Camry? | DIY Swap

Replacing the 12-volt battery on a 2015 Toyota Camry gas model takes 20 minutes with tools. The hybrid’s high-voltage pack needs a professional.

If your Camry cranks slow or dash lights dim, the 12-volt battery is likely due for a swap — the simplest maintenance on the gas model, needing only a 10mm socket. First, identify which Camry you own: gas and hybrid versions use completely different battery systems. Picking the wrong battery wastes time and money.

Gas vs. Hybrid: Know Which Battery Your Camry Uses

The 2015 Camry came in two versions. The standard gasoline model uses a conventional 12-volt lead-acid battery in BCI Group Size 35, with AGM recommended for longer life. The Camry Hybrid carries a 276-volt high-voltage traction pack (34 matched prismatic modules) — dangerous and never for DIY.

For the gas model, Toyota’s catalog lists Group 24F as an option, but aftermarket predominantly uses Group 35 — it fits the tray correctly, aligns terminals, and secures under the hold-down bracket. For top-rated options, see our roundup of the best 2015 Toyota Camry battery options.

How To Replace The 12-Volt Battery On A Gas Camry

You’ll need a 10mm socket or wrench, wire brush, and safety gloves. 1. Safety first: Park on level ground, engage parking brake, ignition off, engine cool. Wear gloves and glasses. 2. Locate battery: Open hood; the 12V battery sits in the front corner on the driver’s side. 3. Disconnect negative terminal first: Use 10mm socket on black cable with “–”, lift off post, tuck aside. 4. Disconnect positive terminal: Same socket on red “+” cable. 5. Remove hold-down bracket: Use 10mm socket to remove J-hook bracket nut, unhook from tray. 6. Lift out old battery: Grab by base, lift straight up. Set on flat concrete. 7. Clean terminals: Scrub cable clamps and new battery posts with wire brush until bright. 8. Install new battery: Place Group 35 battery into tray with terminals aligned. Reattach bracket and tighten 10mm nut snugly. 9. Connect positive first, then negative: Attach red “+” cable, tighten; then black “–” cable. 10. Final check: Confirm bracket holds battery firmly, start car — dash and starter should respond normally. Toyota’s official guide confirms this. Some SE owners may need to reset clock and radio presets afterward.

Common Mistakes That Cost Time Or Money

Wrong group size: Group 24F fits tray but won’t secure properly or aligns terminals poorly. Every major parts catalog specifies Group 35. Reversing terminal order: Always negative off first, positive off second — positive on first, negative on second — to avoid short circuits. Leaving battery loose: Road vibration can crack case or snap terminals. Tighten bracket until battery doesn’t budge. Confusing hybrid with gas: If Camry has “Hybrid” badging, stop. The 276-volt pack requires certified tech with insulated tools.