Grumbling / hesitation under acceleration M35d - 2015 78k

[Talay]

Thoughts before it goes to see a doctor.

Full main dealer everything.

In auto, manual, any form, seems (to a layman) more fuel / injector than gearbox) related.

thoughts, ideas, costs, please

and options if not RBM ?

[ThingsBehindTheSun]

When you say grumbling, do you mean the engine is noisy? If so I really hope it isn't this

https://www.pistonheads.com/gassing/topic.asp?h=0&...

[rottenegg]

Hesitation can be caused all manner of things. EGR valve sticking open, duff injector(s), bad upstream O2 sensor etc.

I do have a thought though. If you are that apathetic about attempting to describe the problem and provide context, then the doctor is the best place for it in the first instance.

[mekondelta]

If it’s still your X3 F25 then hesitation could be the transmission. Check your tyres front to back are within 3mm of depth difference. Grumbling not sure, I had a shunting sound like the whole thing disconnecting