BMW 5 Series EGR Symptoms Need Urgent Diagnosis

I had nearly identical symptoms with my 2015 BMW 3 Series last winter. The EGR valve was definitely the culprit, it was stuck open causing all sorts of problems. My car was running rough, especially at idle, had that distinct hissing noise, and the power loss was quite noticeable on acceleration. Got it checked at my regular garage. The mechanic found heavy carbon buildup causing the valve to jam. They had to remove, clean, and test the valve assembly. In my case, the valve itself was damaged beyond repair and needed replacement. The whole ordeal took about a day to fix. It's not a problem you want to ignore, a faulty EGR can cause serious engine damage if left unchecked. Mine was starting to affect other engine components when I finally got it fixed. The symptoms improved immediately after repair, engine ran smooth again, fuel economy went back to normal, and that annoying hissing disappeared completely. Would suggest getting it checked soon before it leads to bigger issues. An EGR valve problem is pretty straightforward for any competent mechanic to diagnose and fix.

Thanks for sharing your experience, this is super helpful! That's exactly what I'm dealing with. Would you mind telling me roughly how much you ended up paying for the whole repair? Also curious if you've had any similar issues pop up since getting it fixed. Mine's been giving me anxiety every time I start it up, so it'd be great to know what to expect long-term.

Hey again! Yeah, I can totally put your mind at ease about this. I got my EGR valve fixed about 8 months ago, and it cost me 355 € for the whole job, parts and labor included. Honestly, it was worth every penny because the car's been running like a dream since then. The best part? No more issues whatsoever! That annoying hissing is completely gone, the engine's got its pep back, and my fuel consumption is back to normal. Starting up in the morning is smooth as silk now, no more of that rough idle that used to make me cringe. I get why you're anxious about it, I was too! But once they fixed that faulty EGR valve, it was like having a different car. The mechanic showed me the old valve, and it was properly gunked up. No wonder it was causing so many problems. Just make sure you get it sorted soon, mine was starting to affect other parts when I finally got it fixed. Trust me, you'll feel the difference immediately after the repair. And hey, at least now you know exactly what you're dealing with!

Just got back from the mechanic today and wow, what a relief! Had my car fixed and you were spot on about everything. Got my EGR valve replaced and the whole thing cost me about 400€, a bit more than yours but still totally worth it. The mechanic showed me the old valve, it was completely clogged with carbon deposits. No wonder my car was struggling! They did a thorough cleaning of the surrounding area too, just to prevent any future issues. The difference in performance is like night and day. Started it up right there in the shop and the engine purred like new, no more hissing, no rough idle, nothing! Even drove it home and it felt amazing, just like when I first bought it. Fuel gauge isn't dropping like crazy anymore either. Thanks again for your advice. You really helped me avoid what could've been a much bigger headache. Think I've found my new regular mechanic too, they were super transparent about everything and didn't try to upsell me on unnecessary stuff. What a load off my mind!