If its any consolation, I was the 1st ever owner of the VW Tiguan EA189 (aka diesal gate) 170bhp engine in the UK back in 2008 (which was more than the MG4!). The car in the 1st year was an absolute nightmare with sensors / EGR valves etc..., and then they did something to the car (MMmmm I wonder what?), and nearly 15 years later (170,000 miles), the car has never missed a beat (well only once when the earth strap corroded somewhere on the underside, but the AA chap fixed it with an old battery cable to a new earthing point, a good many years ago!) - sadly (or maybe good news), that since september when i got the MG4, it hasn't moved off the drive, but I will still keep it for longer journies, as its not worth much according to WBAC, but still in very good order - so just hang in there!