BMW 3 Hybrid Air Flap Failure Causing Engine Heat Issues

I've actually dealt with similar issues with my 2015 BMW 5 Series Hybrid last year. The active air flap problem is quite serious if left unchecked, as it directly affects engine cooling and performance. When I experienced it, my car showed identical symptoms, slow warm-up times and running hot. At the garage, they found that the electromechanism controlling the air flaps was defective, causing them to stay in a fixed position. This prevented proper airflow management through the radiator. The diagnosis revealed that some debris had also gotten stuck in the mechanism, making things worse. The repair involved replacing the entire air flap control unit and cleaning the surrounding area. It wasn't a quick fix, my car was at the shop for two days while they sorted everything out. Since the repair, the engine's been running at normal temperatures and warming up properly. Don't put this repair off, it can lead to more severe engine problems if not addressed. The air flap system is crucial for maintaining optimal engine temperature.

Thanks for sharing your experience with the air flap issue. That's really helpful to know it was the control unit in your case. You've described pretty much exactly what I'm experiencing, same symptoms and all. Been thinking about getting it fixed soon since I don't want any more engine problems. Would you mind letting me know roughly how much you ended up paying for the repair? Also curious if you've had any other related issues pop up since getting it fixed?

Hey there! Just wanted to follow up about the repair costs since you asked. I paid 590 € to fix the electromechanism for the air flaps. Honestly, while it wasn't cheap, it was totally worth it because the problem's been completely sorted now. Since getting it fixed last year, my car's been running perfectly, no more active air flap faults or engine temperature issues. It was such a relief when everything went back to normal after the repair. The engine warms up properly now and maintains the right temperature, just like it should. I know I made the right call getting it fixed when I did. My mechanic mentioned that waiting too long could've caused bigger problems down the line. If you're experiencing the same symptoms, I'd definitely recommend getting it sorted sooner rather than later. It's not the kind of issue you want to ignore, you know what I mean? Feel free to ask if you need any other details about my experience with the repair!

Thanks a lot for the detailed cost breakdown and follow-up info! I actually took my car to the mechanic yesterday after our chat. Turns out you were spot on, it was the air flap control unit that needed replacing. The mechanic showed me the old unit and it was pretty messed up, with some debris stuck in there too. The repair cost me a bit more than yours, but they also found and fixed a small coolant leak while they were at it. Got my car back today and what a difference! The engine's warming up normally now, and that annoying check engine light is finally off. Should've done this weeks ago instead of worrying about it. Really appreciate you sharing your experience, it gave me the push I needed to get it sorted. Feels good to have a properly running car again!