Brain has been flashed buy the bmw specialiasta with autologic, the specialist with gt1 and myself as I have the kit aswell. No fault codes either.

Spark plugs are around 1000 miless old!

It happens on cold and warm

I've checked over the car for leaks but will check again.

It doesn't have a BMW battery btw, the car has a different one and it's smaller aswell in size.

The thing is, it makes the ever so slight jerk doing it in manual mode when I am sat on the brakes on idle. This slight jerk is exaggerated and felt more when coming to a fast stop aswell then. The important thing here is that it only does the jerk when coming to a really aggressive stop not a gentle stop.

Thanks for you reply btw.