How to Replace the Battery in a Roewe RX3 Car Key?
2 Answers
Press the button on the remote key to pop off the decorative panel. Remove the spare mechanical key in the direction of the arrow. Insert a tool into the side of the key and pry up the battery cover until the clip releases. Separate the battery cover from the key button surface along the contact area. Remove the old battery and place the new battery into the slot, ensuring proper and full contact between the battery and the battery cover.
I've been driving the Roewe RX3 for over three years and have replaced the key battery twice—it's quite simple. Usually, there's a small gap on the back of the key. Use something firm like a coin or a small screwdriver to gently pry open the casing. Take out the old battery; it's a CR2032 coin cell, the 3V type. Buy a new one from the supermarket and replace it, making sure the positive side faces up—don't put it in backward, or the key might not work. Press the cover firmly when closing it, then test the remote buttons to see if they respond. The battery should be checked after about a year and a half, as it drains even when not in use. Doing it myself saved me dozens of yuan and avoided issues with unlocking on the go. Remember to keep it away from water or grease, and cleaning the contact points inside is a good precaution.
