E89 Failed MOT today

[Z4Shane007homas]

Good Evening all

Havent been on here for a little while been busy with work, but at least enjoying the car in this weather. car went for MOT today, thankfully nothing too major, Ball Joint & Rear Alloys are cracked hopefully i will get some quotes on repairing these tommorow.

Very odd question quite recently i've been driving the car but when i go from (D) drive into (R) Reverse there is a knocking noise on small bumps as park the car, but if i turn the engine off and on again it's normally ok. The car still drives fine. just a very odd knocking - wondered if the auto gearbox need's a service, or could it be suspension related.?

Thanks in advance if you have any idea what it might be