2018 BMW 340i — dealer cannot reproduce an intermittent warning

Write down what you already tried. A second data point from another 2018 BMW 340i owner helps more than a generic diagnosis. That's where I'd start. Run the total, not the monthly, before you commit. Might be overthinking it, but I'd rather overthink than overspend.

I'd keep this practical. Verify the cheap/easy branch on the 2018 BMW 340i before a big repair or a big spend. I'd do that before spending real money. This is from a 2018 BMW 340i in Las Vegas. If it doesn't change the out-the-door or the repair estimate, it's noise. I'll update if anything new shows up.