What could cause intermittent jerking at idle in a Jetta 7 after two years?

What could cause a sudden jolt in the Mazda CX-7 transmission at a speed of 100 km/h?

The air conditioning isn't cooling. I checked the pipes and found no leaks. However, after adding refrigerant, it was gone in less than two months. For an 11-year-old imported Mazda CX-7, what usually causes this issue?

What could be the reason for the Phaeton loudspeaker system working intermittently?

What could be causing severe idling vibration?

What could be causing starting difficulties, where sometimes it takes two or three attempts to start?

I want to ask fellow car enthusiasts, what could be the cause of a jerking sensation when pressing the accelerator?

The engine fault code flashes at idle and stays on when starting. The fault indicates a misfire in cylinder two. After replacing the ignition coil and spark plugs, and cleaning the injectors, the fault code disappeared but returned after two days. Do you know what might be causing this?

What could be causing the severe idling vibration in the x95? It's at 5.5 kilometers. How can I resolve this issue?

What could cause intermittent jerking at idle in a Jetta 7 after two years?

What could cause a 2017 Jetta 1.5 manual to have engine shaking when cold and stuttering on idle start? It's only done 90,000 km. 😊