BMW Z4 Error Code Mystery After Mechanic Visit

I had a similar issue with my 2018 BMW M2 last month. The error codes started showing up after routine maintenance too. My OBD2 reader showed multiple transmission-related codes, which turned out to be from an incomplete system reset after the service. Had to get it properly diagnosed at a certified shop. The main problem was a faulty transmission control module that wasn't properly recalibrated after the last service. They had to perform a complete system reset and recalibration. It was quite serious since driving with incorrect transmission parameters could've damaged other components. My suggestion: don't risk it with uncertain repairs. These modern BMWs need proper diagnostic equipment and expertise. Get it checked by someone who really knows these systems, preferably at a shop specializing in German cars. The error message might seem minor, but in my experience, it's better to address these warnings early.

Thanks for sharing your experience! That's exactly what I was worried about with my Z4. Mind if I ask how much the diagnostic and repair work set you back? Just trying to get a rough idea of what I might be looking at. Also, has everything been running smoothly since the fix, or have you noticed any other quirks?

Hey there! Happy to give you an update on my M2 situation. Actually, the best part was that the diagnostic and fix didn't cost me anything since it was clearly related to the previous incomplete service work. The shop did a proper OBD2 diagnostic scan and found it was just that System readiness check that wasn't completed properly. Since getting it sorted, my M2 has been running perfectly smooth, no more error messages or weird behavior. The transmission is shifting like butter again, just as it should. The key was really finding someone who knew what they were doing with the diagnostics equipment. I totally get why you're concerned about your Z4, these high-tech BMWs can be tricky when the systems aren't properly reset. But based on my experience, it sounds very similar to what I dealt with, and it might be a pretty straightforward fix for you too. Just make sure you get it looked at by someone who really knows their BMW systems.

Update on my Z4 situation! I took your advice and found a specialized German car shop. You were spot on, it turned out to be exactly what you described. The previous mechanic hadn't properly completed the system reset after servicing. The new shop ran a full diagnostic and sorted everything out in just a couple of hours. Best part? They didn't charge me for the fix since it was clearly the previous shop's mistake. They even showed me the diagnostic readings and explained what went wrong. The car's running perfectly now, no more error messages, and everything feels smoother. Really glad I didn't just ignore it or go back to the original shop. Sometimes paying attention to these small warnings really saves you from bigger headaches down the road. Thanks again for your help, definitely saved me from what could've been a much bigger problem!