Alphard Injection Nozzle Issue

I've got an Alphard too, and those symptoms sound eerily familiar. I had similar issues crop up a while back. Was the reduced engine power very noticeable, especially at higher speeds?

Indeed, the power reduction is most apparent when accelerating onto the highway or attempting to overtake. Did your issue also manifest similarly before you resolved it?

Spot on! That's exactly how it was for me. It progressively worsened. Ultimately, I had to get the injection nozzles cleaned and one replaced at a workshop. I suggest getting it checked out professionally before it causes further damage.

Thank you for confirming my suspicions and sharing your experience! I shall schedule an appointment with my trusted mechanic immediately. The repair ended up costing 515€, but the Alphard is running smoothly again.