What is the method for replacing the key battery of a Focus car?

[LeTaylor]

The method for replacing the key battery of a Focus car is: 1. Press the button on the edge of the key to release the cover and remove the mechanical key; 2. Insert a screwdriver into the gap at the top and bottom of the key and rotate it to split the remote into two halves; 3. Remove the old battery and replace it with a new one. Taking the 2020 Focus as an example, it belongs to the compact car category, with body dimensions of: length 4378mm, width 1810mm, height 1468mm, wheelbase 2705mm, fuel tank capacity 53l, and curb weight 1242kg. The 2020 Focus features a MacPherson strut front suspension and a torsion beam rear suspension. It is equipped with a 1.5L turbocharged engine, delivering a maximum horsepower of 122PS, maximum power of 90kW, maximum torque of 153Nm, paired with a 6-speed manual transmission.

[OLillian]

Replacing the battery in a Ford Focus key is actually quite simple. I’ve done it twice myself with success. You’ll need a small tool like a coin or a knife to locate a notch on the side of the key and gently pry open the cover. Inside, there’s a battery compartment, usually housing a small CR2032 battery. Remove the old one and replace it with a new one, ensuring the positive and negative poles align with the markings in the compartment. Then, press the cover back into place. The whole process takes just a few minutes, but be careful not to use excessive force to avoid damaging the plastic parts. Key batteries typically last about two years before draining, so it’s advisable to buy branded batteries like Panasonic or Nanfu. Work in a well-lit area to prevent losing small components. After replacement, test the unlock and start buttons to ensure they respond properly. If issues persist, the key module might be faulty and require professional inspection.

[Frodo]

As someone who frequently deals with car maintenance, replacing the battery in a Ford Focus key is quite a common task. First, locate the clip position at the bottom of the key, then gently pry open the casing using a small screwdriver or your fingernail, and slowly remove the battery holder. The battery model is mostly CR2032—make sure to confirm the positive and negative polarity before replacing it to avoid short circuits caused by incorrect installation. After installation, press firmly to reset and test whether the remote function is restored. The actual operation is very simple; the key is to be careful not to damage the plastic seams. Regularly replacing the battery can extend the key's lifespan, and it's recommended to use the CR series to avoid issues caused by using the wrong model. If there are signs of corrosion inside the key, it's best to clean it with an alcohol swab.

[StBrooklyn]

Changing the battery in a Focus key is super easy—I just did mine. Use a coin to pry open the edge of the key, remove the cover, and replace it with a new CR2032 battery, making sure the positive side faces up to match the battery slot design. Then snap the cover back on and test the buttons. The whole process takes just a minute or two—just pick a reliable brand for long-lasting performance.