Lexus NX Auxiliary Battery Error

I've had a similar experience with my NX. The symptoms you describe, especially the weak starting and electrical glitches, sound very familiar. Have you noticed if it happens more frequently after the car has been sitting for a while? Wondering if it's the same problem.

Yes, I've observed that the issue seems to occur more frequently after the car has been idle for an extended period. Could you please elaborate on how you resolved the problem?

In my case, it turned out to be a faulty auxiliary battery. I strongly recommend getting it checked by a qualified technician. It might save you some headache. The repair was around 290€. Hope that helps.

Appreciate the advice. I'll schedule an appointment to have the auxiliary battery inspected. Your experience has been very helpful; hoping replacing the battery solves the problem.