Owners of other Toyota or Lexus vehicles such as the Tundra, 4Runner, Hilux, Highlander, C-HR, Avalon, Camry, Corolla, Supra, Land Cruiser, Prius, RAV4, Mirai, Sequoia, Sienna, Yaris, CT 200h, ES 300h, RX 350, GX 460, LX 570, NX 300, RX 450h, UX 200 and UX 250h may also find these DIY instructions to be helpful.

The OEM (original equipment manufacturer) 12V battery in this 2020 Tacoma TRD Sport was a "Group Size" number 24F and the genuine Toyota part number is 28800-03047 80D26L.

Your truck might have been equipped with a slightly larger group size 27F battery if it has the towing package.

The smaller group size 35 battery will also work if you can't find the larger 24F or 27F options.

A few compatible replacement replacement aftermarket 12V automotive batteries with their part numbers include the following: Optima YELLOWTOP 8037-127 D27F, Exide Edge FP-AGM24F and Optima REDTOP 8020-164 35.

The tools needed to complete this procedure include a deep well 10mm socket with a 1/4" ratchet or a standard 10mm wrench.

The first two steps are to open the hood and move to the right (driver) side of the engine bay.

Slightly loosen the two nuts on the top of the battery hold down bar or "clamp" by turning them in the counterclockwise direction with the deep well 10mm socket and a 1/4" drive ratchet or a 10mm wrench.

Just loosen them enough for you to detach the two "J" hooks at the bottom of the bars.

Carefully remove the two "J" hooks from their mounting brackets.

Avoid making contact with the terminals or the battery posts!

Lift off the hold down clamp and set it aside in a safe place.

Loosen the nut on the negative "-" terminal by turning it in the counterclockwise direction with a 10mm socket and a 1/4" drive ratchet.

Wrap the terminal in a small towel and tuck it away on the right side of the battery to help prevent accidental electrical contact.

Flip open the red plastic cover on the positive "+" terminal. (The terminal cover might be rubber on your truck.)

Pull the positive terminal off the "+" battery post.

Tuck the positive terminal away on the left side of the old battery.

Clean off any debris on the white plastic battery tray so that the new battery will rest evenly on it.

If you've had a problem with corrosion (white or blue powder) building up on the terminals or the cables, consider installing some felt anti-corrosion washers over the battery posts.

You could also apply some CRC Battery Terminal Protector spray on the terminals, posts and cables.

Carefully lower the new battery down into the engine bay.

The positive "+" battery post should be situated on the left (passenger) side closer to the engine and the negative "-" battery post should be located on the right (driver) side near the outside of the vehicle.

Tighten the terminal nut in the clockwise direction with the 10mm socket and a 1/4" drive ratchet until it is snug.

Try to avoid over tightening the terminal nut to prevent from cracking the battery post which could lead to an acid leak.

Flip the red cover closed over the positive terminal.

Re-insert the two "J" hooks into the holes on their mounting brackets on the front and rear edge of the tray.

Avoid making contact with the terminals or the posts.

Check to see if the new battery can be moved, rocked or slid around on the tray.

If the new battery can be moved, tighten the two nuts on the hold down clamp an extra turn or two.

Please remember to adjust the time on the clock and re-program your favorite radio stations before you start driving.

Be sure to write down the battery change in your truck's service records.

Please check out all of the 2016-2021 Toyota Tacoma DIY Repair & Maintenance Guides.