BMW i8 Hybrid Struggles: Stalling and Power Loss Crisis

Hey! I feel your pain. I had very similar issues with my 2020 BMW i3s Hybrid last month. The symptoms you're describing match exactly what I experienced, poor acceleration, rough idle, and emission problems. Turned out my fuel injectors were clogged and one was completely defective. The garage had to replace two injectors and clean the entire fuel injection system. It was definitely a serious job since these components are critical for proper fuel delivery and engine performance. The tricky part with hybrids is that injector issues can mask themselves as electric motor problems, which often leads to misdiagnosis. When I first noticed the symptoms, I thought it was the hybrid system acting up, but it was purely a combustion engine problem. The repair sorted out all my issues, no more stalling, power's back to normal, and emissions are perfect now. Since you've got similar symptoms, I'd strongly suggest getting those injectors checked. Make sure to find a garage that specializes in BMW hybrids, as these systems need specific diagnostic tools and expertise.

Thanks for sharing your experience! That's really helpful as it sounds exactly like what I'm dealing with. Quick question, do you remember roughly how much you ended up paying for the injector replacement and cleaning? Also, has everything been running smoothly since the repair, or have you noticed any other issues pop up? Just want to know what I might be looking at cost-wise and if I should expect any related problems down the line with my i8.

Hey again! Yes, absolutely, I can tell you all about the costs and how things have been running since the fix. I paid 515 € for replacing the faulty injector, which included the parts and labor. Initially thought it might cost more, but thankfully it wasn't as bad as I feared. And I've got great news, since getting it fixed three weeks ago, my car's been running like a dream! That annoying Mixture preparation error is completely gone, and the engine's performing perfectly. No more stuttering, no more stalling, and the acceleration is smooth as silk again. Honestly, it feels just like when I first got the car. I know these repairs can be nerve-wracking (especially with hybrid systems), but once you get the injector sorted, you should be good to go. Haven't had a single problem since the repair. Just make sure you find a mechanic who really knows their stuff with BMW hybrids, it makes all the difference. Trust me, it's worth getting it done right the first time!

Thanks so much! Just got back from getting my i8 checked out and fixed. You were spot on, it was definitely the injectors causing all the trouble. Had to shell out a bit more than you did, around 750 € for two injectors, but totally worth every penny. The mechanic I found was actually fantastic! Super knowledgeable about hybrids and took the time to explain everything. I took it for a proper test drive yesterday and wow, what a difference! No more stuttering, stalling, or any of those annoying issues. The engine's got its punch back, and it's running so smoothly now. Can't believe I waited this long to get it sorted. Seriously grateful for your advice, saved me from going back to that previous mechanic who probably would've just made things worse. Think I've finally found a reliable mechanic for future maintenance too. They really knew their stuff about the i8's hybrid system. Thanks again for pointing me in the right direction!