Cold start misfire that clears up after a minute, should I be worried?

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    zeferinodennis
    Participant
    My 330i has started stumbling slightly on cold start, nothing dramatic, just a rough idle for about thirty seconds and then it smooths out and drives perfectly for the rest of the day. No warning lights, no loss of power, and it only happens when the engine’s been sitting overnight. I’ve been telling myself it’s just a quirk of an older car but it’s been getting slightly worse over the past couple of weeks and I’d rather not wait for it to turn into a proper misfire at speed. A friend sent me https://bmw-garage.ae when I mentioned it, mostly because I was trying to understand whether it’s likely plugs, coils, or something more involved, but I’d rather hear from people who’ve actually had this symptom. Did yours turn out to be a simple fix or the start of something expensive? I’m also curious whether it’s worth getting looked at now or if I should wait until it actually throws a code, because part of me thinks I’m being paranoid over nothing.

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