2015 BMW 335i — project-car budget is disappearing into little parts

Don't overfit one forum story to your car. If it still isn't clear on the 2015 BMW 335i, a specialist hour can be cheaper than another round of parts. Then you'll know the next fork. This is from a 2015 BMW 335i in Texas with 152,000 miles. Write the result down so the next test isn't a repeat of the last one. I'm keeping receipts and dates in one folder.

Write down what you already tried. A second data point from another 2015 BMW 335i owner helps more than a generic diagnosis. I'd do that before spending real money. If it doesn't change the out-the-door or the repair estimate, it's noise. This is the version I'd tell a friend.