How to replace the battery — Toyota Corolla 2020

Tools you'll need

• 10 mm socket or wrench
• Ratchet
• Battery terminal cleaner or wire brush
• Gloves
• Safety glasses
• Rags

Parts you'll need

• New 12V battery (Group Size 35 or 47, check your owner's manual)
• Battery terminal grease

Steps

1. Park, turn everything off, and open the hoodPark on flat ground, turn the ignition off, and remove the key. Open the hood and find the battery in the engine bay.
2. Disconnect the negative cable firstLoosen the nut on the black negative (-) cable with a 10 mm wrench and pull the cable off the terminal. Tuck it aside so it cannot touch the battery.
   Tip: Always remove the negative cable first to avoid a short.
3. Disconnect the positive cableFlip up the red cover on the positive (+) terminal, loosen the nut, and pull the cable off. Keep the two cables apart.
4. Remove the hold-down bracket and lift out the batteryUnbolt the bracket or strap that holds the battery in place. Lift the old battery straight up and out; it is heavy, so use both hands and lift with your legs.
   Tip: Batteries are heavy (about 30-40 pounds). Ask for help if you need it.
5. Clean the tray and terminalsWipe out the battery tray and clean any corrosion off the cable ends with a wire brush or terminal cleaner.
6. Set in the new battery and reconnect positive firstSet the new battery in the tray the same way the old one sat and refit the hold-down bracket. Connect the red positive cable first and tighten it, then connect the black negative cable.
   Tip: Put a thin layer of terminal grease on the posts to slow corrosion.
7. Start the car and check everythingStart the engine and make sure it cranks normally. Check that the radio, clock, and windows work, and reset the clock if needed.
   Tip: Take the old battery to a parts store for recycling; most will take it for free.

Safety first

Batteries contain acid and can produce explosive gas. Wear gloves and safety glasses, do not smoke nearby, and never let the two cables touch. If you are not confident, have a qualified technician do this job.