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OP OP! Article about the battery system on BMW.
Proper battery operation on a BMW is essential to the reliability and stability of all of the vehicle's electronic systems. When replacing the battery, it is important to note that after each installation, the new battery must be registered in the vehicle's system. If the capacity or type of battery is changed, the coding and registration must be carried out in addition.
There are two types of batteries: alkaline and gel (AGM). We recommend installing an AGM gel battery as it has a number of advantages, including a higher starting current, which is especially important for modern cars with a lot of electronics.
The average life of a BMW battery is about 5 years, after which it needs to be replaced. However, many drivers wonder: why change the battery, if the car continues to start and at first glance works without problems? The thing is that gel batteries drop in voltage over time, which leads to disabling of some functions, such as heated mirrors or start-stop system. This may not be immediately noticeable, but in the long run it affects the performance of the car.
What makes a gel battery unique is that even when it loses capacity, it retains a high starting current, making it more reliable than an alkaline battery. This is especially important for vehicles with automatic engine start and stop systems.
Why register a new battery?
When a battery is replaced, it is imperative that it is registered with the vehicle's system. This is because the on-board network collects information about the type, capacity, age and condition of the battery, adjusting the operation of the systems depending on its characteristics. If the battery is not registered, errors in comfort and safety systems can occur.
In addition, in vehicles with engine starting and stopping, registration is especially important because AGM batteries are specifically designed for this purpose. Without registration, new batteries may not operate correctly, resulting in notifications on the control panel.
It is also worth bearing in mind that if the vehicle is fitted with additional equipment, a battery with a higher capacity may be required and its parameters must be programmed to suit the vehicle.
Thus, proper installation, registration and, if necessary, coding of the battery are mandatory steps to maintain stable operation of all BMW electronic systems.
For more details, see YouTube - https://youtu.be/_QIwwK9hCGM?si=g4codYzxGqloNUYW
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