florianshadow1
Mini Clubman battery alarm system defective
Summary of the thread
A 2017 Mini Clubman owner experienced a "battery alarm system defective" error, suspecting the auxiliary battery as the cause due to its potential ageing and discharge issues. Another individual with a similar experience suggested that the auxiliary battery, which powers the alarm system, might be faulty. A system diagnosis at a workshop confirmed the auxiliary battery was indeed the problem, and replacing it resolved the issue, restoring the alarm system's functionality.
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4 comment(s)
florianshadow1 (community.author)
Thanks for the quick response! When you had the battery problem, did you also experience any other weird electrical issues, or was it just the battery alarm? And how did you figure out it was the auxiliary battery specifically? Did you do the system diagnosis yourself, or did a mechanic do it?
antoniaflamme1
Yes, the only thing I noticed was the alarm acting up. I didn't try to diagnose it myself, to be honest. I took it straight to the workshop, and they confirmed it was the auxiliary battery after running a system diagnosis. Given that you're getting the same error, it's highly likely that's the cause. Best to get it checked out by a workshop to be sure.
florianshadow1 (community.author)
Just wanted to give an update – you were spot on! Took the Mini Clubman to a workshop. System diagnosis confirmed it was the auxiliary battery causing the battery alarm issue. They replaced it and cleared the error memory. Cost me around 330€. Everything's working fine now, alarm system is back in action. Thanks a lot for your help!
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MINI
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CLUBMAN
antoniaflamme1
I had a similar battery problem with my Mini Clubman. The battery alarm kept popping up, and it turned out to be a faulty auxiliary battery. Have you done a battery check on that one specifically? It's separate from the main car battery and is responsible for the alarm system and some other functions. A system diagnosis might be the best way to pinpoint the issue.