How to Replace the Battery in a BMW Car Key?
2 Answers
To replace the battery in a BMW car key, follow these steps: 1. Remove the spare key located at the back of the key and gently pry open the back cover using your hand or the spare key; 2. Take out the old battery and clean the surface of the new battery with a clean tissue; 3. Use the tissue to push the new battery into its original position and then close the back cover of the key. Taking the 2021 BMW 1 Series as an example, it is a compact car with the following dimensions: length 4462mm, width 1803mm, height 1446mm, wheelbase 2670mm, and a fuel tank capacity of 50 liters. The 2021 BMW 1 Series features a MacPherson strut front suspension and a multi-link independent rear suspension. It is equipped with a 1.5L turbocharged engine, delivering a maximum horsepower of 140ps, a maximum power of 103kW, and a maximum torque of 220Nm, paired with a 7-speed dual-clutch transmission.
I've been driving a BMW for several years and have encountered the key battery running out a few times. My key is the smart type with buttons, and the battery compartment usually has a small gap on the side. Use a small coin or fingernail to gently pry open the cover—be careful not to force it and scratch the surface. After removing the old battery, make sure the new one is a CR2032 model, with the positive side facing up. When closing the cover, listen for a click. Sometimes the key will flash a warning before the battery dies, so pay attention to avoid trouble. Nowadays, battery quality varies, so choosing a branded one can last half a year longer—don’t cheap out and end up with a fake. The whole process takes about ten minutes, saving both money and hassle, without needing to visit a shop. Keep the key in your bag and avoid high-temperature areas to slow down battery drain.
