What is the battery model for BMW 3 Series key?
3 Answers
BMW 3 Series key uses CR2450 battery. Here are the detailed specifications of BMW 3 Series: 1. Configuration: The entire series comes standard with cruise control and a rearview camera featuring parking assist. Models other than 320i/Li are equipped with standard keyless entry. 2. Infotainment System: BMW 3 Series incorporates features like in-car WeChat, short video apps, and indoor parking maps. In addition to keyless entry and advanced connected driving functions, it also includes a high-definition dash cam. 3. Powertrain: Equipped with three versions of 2.0T engines (high/medium/low power), paired with an 8-speed automatic transmission, offering both rear-wheel drive and all-wheel drive options.
A few years ago, the key fob for my BMW 3 Series suddenly stopped responding, and I had to manually press the key to unlock the car, which was quite a hassle. I opened the key fob and found that the CR2032 coin battery was almost dead. These batteries typically last two to three years, depending on how frequently you use the key. Replacing it is simple: locate the small button or groove on the back of the key, gently pry open the casing, remove the old battery, and replace it with a new CR2032. Just make sure the battery is inserted correctly—positive side up—to avoid damaging the key. I usually buy new batteries at the supermarket or online for just a few dollars. After replacing it, the key works like new, and I feel much more at ease when driving. I recommend keeping a spare battery with you just in case.
I found that the BMW 3 Series key fob typically uses a CR2032 battery, which is a 3-volt lithium battery with standard dimensions of 20mm in diameter and 3.2mm in thickness. This battery is chosen for car keys due to its compact size and stable power output, generally supporting remote functions for one to two years. When replacing it, be careful not to purchase the wrong model, such as CR2025 or CR2016, as their capacities differ significantly. I've replaced it a few times myself—just gently pry open the key fob, and the process is simple, taking only a minute. It's best to buy the battery from an authorized store; the brand doesn't matter, but avoid cheap, low-quality products, as they may have shorter lifespans or cause malfunctions. If the key fob functions abnormally, check the battery first to avoid travel disruptions.
