Owners of other Toyota, Lexus or Scion vehicles such as the Yaris, Matrix, Prius, Camry, Corolla, Sienna, RAV4, Tundra, FJ Cruiser, Venza, Highlander, Avalon, Sequoia, Hilux, Land Cruiser, IS 250, ES 350, GS 350, tC, xB, xD, iQ and FR-S may also find these DIY instructions to be helpful.

The OEM Toyota battery is a "Group Size 27F" and Johnson Controls Battery Group part number 28800-0F020.

The tools needed to replace the automotive battery include a deep well 10mm socket with a 1/4" drive ratchet or a standard 10mm wrench.

Loosen the negative "-" terminal nut by turning it counterclockwise with the 10mm socket and 1/4" drive ratcheting wrench or a standard 10mm hand wrench.

Carefully pull the negative terminal off the battery post, wrap it in a small towel and tuck it away on the side of the battery to help prevent accidental electrical contact.

Then flip open the red plastic cover on the "+" positive terminal.

Loosen the 10mm nut on the positive terminal by turning it counterclockwise.

The OEM battery is held in place to the tray by a metal bar and two "J" shaped hooks.

Loosen the nuts on the two "J" hook bars by turning them counterclockwise with a deep well 10mm socket and a ratcheting wrench or a standard 10mm wrench.

Lift the battery hold down bar out of the way and rest it on the fuse box.

Try to avoid dropping or tipping over the old battery to prevent from having battery acid leak out.

Make sure you bring the old battery with you to Walmart or the auto parts stores so you can avoid having to pay a "core" charge and so that it can be properly recycled.

If you can wait a few days for delivery, I recommend buying the Optima 8020-164 35 RedTop since it has excellent reviews on Amazon.

Lower a new Group Size 27F or 24F 12 volt battery in to the engine bay with the Positive "+" post on the left (passenger) side and the Negative "-" post on the right (driver) side.

Carefully lower the battery hold down bar over the new battery while avoiding making contact with the posts.

Hold each "J" bar in place with one hand while tightening the 10mm nut in the clockwise direction.

Continue tightening the two 10mm nuts until the battery clamp is secure.

Make sure that the new battery can't be moved, rocked, or slid around on the tray. If it can be moved, tighten the two 10mm nuts on the clamp a few more turns.

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

Tighten the "+" terminal nut in the clockwise direction with the 10mm socket and 1/4" drive ratcheting wrench.

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

Flip the red plastic cover over the positive terminal.

Tighten the 10mm negative terminal nut in the clockwise direction until it is snug.

Test the new 12V battery by starting the engine and turning on the headlights.

Make sure you adjust the time on the clock and program your favorite radio station presets before you start driving.

For more, check out my other 2005-2015 Toyota Tacoma DIY Repair & Maintenance Guides.