BMW DISA Valve Symptoms: Stalling & Power Loss Alert

I had a similar issue with my 2016 BMW 5 Series. The symptoms were exactly what you're describing, rough idle, power loss, and occasional stalling. Had it checked at the garage last month, and it turned out to be a faulty DISA valve. The mechanic showed me that the valve flap was stuck and the vacuum unit wasn't working properly. My DISA unit was completely worn out and required a full replacement, couldn't just fix the valve alone. It's a critical component that controls air flow into the engine, so it wasn't something I could postpone fixing. The repair took about 3 hours at the shop. Since getting it fixed, the engine runs smooth again, idle is stable, and power delivery is back to normal. The check engine light also cleared up. If your symptoms match these, I'd definitely get the DISA valve checked by a BMW specialist rather than a general mechanic. It's actually a pretty serious issue that can lead to bigger engine problems if left unattended.

Thanks for sharing your experience! That's exactly what I'm dealing with right now, and it's good to know I'm not alone with these symptoms. I'm planning to take it to a specialist this week. Just curious, do you remember roughly how much you ended up paying for the repair? Also, has everything been running smoothly since the fix, or have you noticed any other issues pop up? Really appreciate your help with this.

Hey there! Just wanted to follow up, yeah, I remember exactly how much it cost me since it wasn't that long ago. The total bill came to 280 € for the complete DISA unit replacement. Honestly, while it wasn't cheap, it was totally worth it. The car's been running like a dream since the fix, seriously, it's like night and day difference! No more of that annoying rough idle or power issues. It's been about a month now, and I haven't had a single problem pop up. The engine feels smooth and responsive again, just like it should. I'm actually really glad I went ahead and got it fixed when I did. The mechanic mentioned that leaving it unchecked could've led to more expensive engine problems down the road. So yeah, definitely get yours checked out by that specialist, sounds like you're dealing with the exact same thing I was. Trust me, you'll notice the difference right away once it's fixed! Let me know how it goes with your repair, always interested to hear how these things turn out for other BMW owners.

Thanks so much for all the details! Finally got mine fixed yesterday and you're absolutely right, what a difference! My experience was pretty similar to yours. Went to a BMW specialist and they confirmed it was the DISA valve. The repair cost was slightly higher at 320 € but totally worth every penny. The mechanic was actually really thorough and showed me the old valve, it was completely shot. No wonder my car was acting up! He explained everything clearly and even gave me some tips for preventive maintenance going forward. The best part? My car's running perfectly now. The rough idle is gone, power delivery is smooth, and that annoying check engine light finally disappeared. It's like driving a completely different car! Really glad I didn't put this off any longer. Thanks again for pushing me in the right direction with this. It's such a relief to have this sorted out properly instead of bouncing between general mechanics who couldn't pinpoint the issue. Sometimes you just need to hear from someone who's been through the same thing!