How to Replace the Battery in a BMW 5 Series Key?
2 Answers
BMW 5 Series key battery replacement method is: 1. Gently pry open the back cover of the key with a flat-head screwdriver and remove it; 2. Take out the old battery and insert the new battery into the slot. The BMW 5 Series is a mid-to-large-sized sedan. Taking the BMW 5 Series 2021 525Li Luxury Package as an example, its body dimensions are: length 5106 mm, width 1868 mm, height 1500 mm, with a wheelbase of 3105 mm. The BMW 5 Series 2021 525Li Luxury Package is equipped with a 2.0T turbocharged inline 4-cylinder engine, with a maximum horsepower of 184 hp, paired with an 8-speed automatic transmission.
I often help friends replace the battery in their BMW 5 Series key fobs, and it's actually not that difficult. First, locate the small groove on the back of the key, then gently pry or push it open with a small flat-head screwdriver—the cover should slide off easily. Be careful not to use too much force to avoid scratching the casing. Inside, you'll find a CR2032 coin cell battery. When removing it, pay attention to the positive and negative orientation. You can buy a new one at a supermarket or online for just a few bucks. Install the new battery by aligning it properly and pressing it in gently, then snap the cover back on. Test the remote functions by locking or unlocking the car. Typically, the battery lasts about two years with regular use, so it's a good idea to keep a spare handy to avoid being stranded. This simple DIY saves a trip to the repair shop and feels pretty rewarding!
