BMW i8 Hybrid Running Rough: Common Fixes and Solutions

I've been through something very similar with my 2016 BMW i3. Based on your symptoms, I'm pretty confident it's the accelerator pedal module. Had the exact same issues, jerky acceleration, poor throttle response, and terrible fuel economy. Last month at the garage, they diagnosed it using their computer system. The faulty sensor in the pedal module was sending incorrect signals to the ECU, causing all those problems you described. It's actually a serious issue that can get worse and potentially leave you stranded if not addressed. The repair wasn't too complex, they replaced the entire pedal module assembly. The car's been running smooth as silk since then, with normal fuel consumption and perfect throttle response. I'd definitely recommend getting it checked out soon to prevent any further complications with your i8. Just make sure they do a proper diagnostic test first to confirm it's the pedal module before replacing any parts.

Hey! Really appreciate you sharing your experience! That sounds exactly like what I'm dealing with. I'm going to get it checked out this week, hopefully it is just the pedal module. Can you remember roughly how much you ended up paying for the whole job? Also, has everything been running smoothly since the repair, or have you noticed any other issues pop up?

Happy to help! Yes, I can confirm everything has been running perfectly since I got it fixed. The mechanic diagnosed it correctly, it was indeed the throttle valve that was causing all those problems. They replaced the defective accelerator pedal module and it cost me 205 €. The price included both parts and labor, which I thought was pretty reasonable considering how much better the car runs now. The transformation was like night and day! No more stuttering, fuel consumption is back to normal, and the acceleration is super smooth again. It's been about three months since the repair and I haven't had a single issue pop up. My i3 feels like new again. Trust me, once you get it sorted, you'll notice the difference immediately. The cold starts will be smooth, and you won't have that annoying hesitation when accelerating anymore. Best decision I made was getting it fixed rather than waiting for it to get worse. Let me know how it goes with your i8!

Hey! Thanks for all your help! Just wanted to update you, I finally got the car looked at by a mechanic yesterday. You were spot on about getting it checked quickly. Turns out it wasn't just the pedal module, but also needed some work on the fuel injection system. Had to shell out quite a bit more than expected, but honestly, it was worth every penny. The mechanic was really thorough and showed me exactly what was wrong. Got it all fixed up in one day, and wow, what a difference! The car's running like a dream now. No more stuttering, smooth acceleration, and the cold starts are perfect. Fuel consumption's back to normal too. Really glad I didn't put this off any longer. Thanks again for pushing me to get it sorted, you probably saved me from bigger problems down the road!