How to Replace the Battery in a Vios Car Key?
4 Answers
Weltmeister EX5 key battery replacement: First, press the button on the side to remove the mechanical key, then open the plastic shell along the incision on the side of the key, remove the button battery, install the new battery, and reassemble the plastic shell and mechanical key following the original steps. At this point, the battery replacement is complete. Below is an introduction to the Weltmeister EX5: 1. In terms of appearance, the Weltmeister EX5 front face adopts a closed air intake grille design to provide better aerodynamic conditions. 2. On the side of the body, the new car strengthens the streamlined shape of the roof and side, giving the vehicle a more sporty proportional form.
I've changed the battery for my Vios key fob quite a few times, so I'm pretty familiar with the process. First, find a flat surface and prepare a CR2032 coin cell battery, which you can easily get at a hardware store for about ten yuan. Flip the key fob over, insert a coin into the middle slot, and gently pry it open until you hear a click, then you can lift off the back cover. Don't rush to remove the battery when you see it—observe the positive and negative orientation first, then use your fingernail to push it out from the side. Insert the new battery in the same orientation, making sure it sits flat. When putting the cover back on, align the three plastic clips and press evenly on all four corners with your palm. Test the unlock button immediately after replacing the battery—the indicator light should work, and the car should respond within about 10 meters. If the button doesn’t work, chances are the battery is inserted backward—just reopen and reinstall it. The whole process takes no more than three minutes, so there’s no need to waste money at the dealership.
Prepare a small flathead screwdriver and a CR2032 battery, and find a well-lit area to perform the operation. There is a small gap on the side of the Vios key—insert the screwdriver about half a centimeter and gently twist it to pop open a slight gap. Run your fingernail along the gap to fully open it; avoid using excessive force, as the plastic clips may break easily. The internal structure is simple: avoid touching the small spring next to the battery slot and directly remove the old battery. Place the new battery with the printed side facing up into the slot and press it firmly downward. When closing the cover, first secure the positioning hole at the top, then press down on both sides. After replacement, remember to hold down the lock button—a beep sound indicates the remote is functioning properly. As a reminder: the battery typically lasts about five years before depletion. Purchase Panasonic or Sony brand batteries in advance for better durability. Local auto repair shops can also replace it for around 20 yuan.
Don't panic if your key suddenly stops working—it's most likely just a dead battery. Buy a CR2032 battery, which you can find at supermarket checkout counters. The Vios key consists of upper and lower shell halves. Use a coin to pry open the gap from the Toyota emblem end. After lifting the cover, you'll see a silver battery—avoid touching the metal contacts directly with your fingers; use a toothpick to gently lift it out from the edge. Insert the new battery with the shiny side facing up and press it in place lightly. When closing the cover, listen for three clicks to ensure it's securely fastened. Test the buttons to see if the red light turns on. Avoid touching the metal contacts on the circuit board throughout the process, as sweat can cause corrosion. The whole replacement takes just two minutes—much more convenient than waiting for a dealership appointment. While you're at it, clean the gaps in the shell, as dust can affect button responsiveness.
