Tag Archives: Batteries

Weakened & Dead BMW Batteries

Weakened & Dead BMW Batteries

With more people beginning to venture out as the stay-at-home restrictions are relaxed, some of their vehicles are experiencing the detrimental effects of prolonged sitting. One of the most obvious and common is a weakened battery. While we’ve seen a lot of no-starts from completely dead batteries, the first sign can often be a long, or slow, crank on startup. Newer BMWs have large batteries because of the extensive electrical systems present in modern cars. The plethora of safety, monitoring, and control systems that need to be maintained at constant voltage are significant. As a result, we refer to them as “rolling computer networks”.  When a battery weakens, it cannot fulfill its function of maintaining a stable power supply to all of these electrical systems, so they begin to shut down. This can go from the annoying, deleting the functionality of convenience features like the clock, to the expensively catastrophic, cutting power to the electric water pump th ... read more

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