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2022 Mini Cooper SE Headlight Flickering & Interior Light Dimming

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Mike T. · rep 0 · May 25, 4:58 AM · 1 replies · solved · Question

Vehicle: 2022 Mini Cooper SE F56 EV

Hi everyone,

I'm experiencing some concerning electrical issues with my 2022 Mini Cooper SE (the electric model). Recently, the headlights have started flickering intermittently, especially noticeable at night or when I'm stopped at a light. It's not a constant flicker, but more like a brief dimming and brightening.

In addition to that, I've noticed the interior lights (dashboard, cabin lights) occasionally dim and then return to normal brightness. This happens seemingly at random. I've also caught a faint, burning electrical smell a couple of times, which has me pretty worried.

Could this be related to the 12V battery, or something more serious with the high-voltage system or a wiring harness? I'm hesitant to drive it much until I get some answers. Any ideas on what might be going on?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:58 AM

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Hello Chris,

Your concerns about flickering lights and an electrical smell on your 2022 Mini Cooper SE are serious and warrant immediate attention. While the Cooper SE is an EV, it still relies on a conventional 12V battery and charging system for many accessories, including lights, and these symptoms often point to issues within that low-voltage system or potential wiring problems.

Here's what could be happening:

  1. 12V Battery Issues:

    • Even EVs have a 12V battery that powers accessories and acts as a 'starter' for the high-voltage system. A weak or failing 12V battery can cause voltage fluctuations, leading to flickering lights and dimming interior illumination. The DC-DC converter (which charges the 12V battery from the high-voltage battery) could also be at fault.
    • Test: Check the 12V battery voltage with a multimeter. It should be around 12.6V when off and stable when the car is 'on' (ready to drive) as the DC-DC converter maintains it.

  2. Loose or Corroded Connections:

    • A loose ground wire or corroded battery terminals (12V) can cause intermittent electrical contact, leading to voltage drops and flickering.
    • Inspect: Check all visible connections, especially at the 12V battery and main fuse box.

  3. Wiring Harness or Component Fault:

    • The burning electrical smell is a significant red flag. This indicates overheating, likely due to a short circuit, overloaded wiring, or a failing electrical component (e.g., a relay, module, or even a light bulb circuit).
    • Caution: If you smell burning, it's crucial to stop driving immediately to prevent further damage or a potential fire hazard.

  4. OBD-II Diagnostics:

    • Use an OBD-II scanner. Look for codes related to system voltage (e.g., P0562 - System Voltage Low), or specific electrical component faults (e.g., B2AAA - Generic Electrical System Fault, or codes related to lighting circuits). EV-specific codes might also be present if the DC-DC converter is malfunctioning.

When to See a Shop: Given the burning smell and the fact that this is an EV, it is imperative that you take your Mini Cooper SE to a qualified Mini dealership or an EV-certified specialist immediately. Do not continue to drive the vehicle. Diagnosing electrical issues in an EV requires specialized training and equipment, particularly when high-voltage systems are involved. Attempting to fix it yourself without proper knowledge can be dangerous. The shop will be able to safely diagnose the 12V system, DC-DC converter, and any potential wiring faults that are causing the smell and flickering.

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