BMW 8 Series Valvetronic Issues Affecting Performance

I experienced similar issues with my 2016 BMW 5 Series diesel. The symptoms matched exactly what you're describing, poor acceleration, increased fuel consumption, and that annoying check engine light. Turned out to be the Valvetronic mechanism. Had it checked at my garage and they confirmed the electronic actuator was failing. The system needed a complete run-in procedure and recalibration. They also replaced some worn components in the mechanism. It was quite a serious job since the Valvetronic system controls engine breathing and valve lift. Not something you want to ignore or have fixed by someone inexperienced with BMW systems. The repair took two days but solved all the issues, engine runs smooth now, and fuel economy is back to normal. My suggestion? Get it diagnosed with proper BMW diagnostic equipment. These symptoms definitely point to Valvetronic problems, and it's worth getting it sorted properly rather than risking more damage.

Thanks for sharing your experience! Really helpful to hear from someone who went through the same thing. I'm curious, do you remember roughly how much the whole repair set you back? Also, has everything been running smoothly since the fix, or have you noticed any other issues pop up? I'm just trying to get an idea of what I might be in for with mine.

Hey there! Happy to give you an update. After getting it fixed, I had to pay 575 € for the complete Valvetronic repair, which included the run-in procedure and replacing some faulty parts. I know it sounds steep, but honestly, it was worth every penny. The best part? My car's been running like a dream since then, no more stuttering, fuel consumption is back to normal, and that annoying check engine light hasn't shown its face again. It's been performing exactly like it should, and I've had zero issues pop up since the repair. I definitely made the right call getting it sorted properly at a BMW specialist. These Valvetronic systems are pretty complex, but once they're fixed correctly, they work perfectly. Trust me, you'll notice the difference immediately after getting it repaired, it's like having a new car again! Just make sure you get someone who really knows their way around BMW electronics to do the job. It's not something you want to cut corners on, if you know what I mean.

Thanks everyone for the advice! Just wanted to update you all on what happened with my BMW. I took it to a certified BMW specialist, and you were spot on, it was indeed the Valvetronic system acting up. The repair cost me around 600, which included replacing some worn components and doing a complete system recalibration. The whole process took about two days, but wow, what a difference! My car's running like new again, no more stuttering during acceleration, fuel consumption is back to normal, and that pesky check engine light has finally gone off. The mechanic walked me through everything they did, which made me feel much better about the whole situation. Really glad I didn't try to save money by going to a generic shop. These BMW systems need proper diagnostic equipment and expertise. Lesson learned! Thanks again for pointing me in the right direction. Time to enjoy my smooth-running 8 Series again!

Hello. I have recurring codes 2A63 & 2A6B that go out 1 start out of 2. It's a 2009 X5 E70 V8 4.8i. The fault always appears at start-up, never while driving, even for hundreds of km. Has anyone encountered and solved this problem? Thanks

(Translated from French)

The codes 2A63 and 2A6B are related to the Valvetronic system, specifically the motor and its reference sensor. Start by checking the Valvetronic motor connections and wiring for any signs of damage or corrosion. Ensure the motor is properly seated and connected. If the issue persists, it might be necessary to inspect the Valvetronic motor itself or the eccentric shaft sensor. Let me know how it goes or if you have further questions!