Hi, I had similar problems like you. I haven't really noticed that at first, I mostly blamed windy weather. I have OBD2 dongle which can also read errors from CVT module but there where none. RPM's started to be unstable after around 20km of driving but after few weeks the problem occurred even afte...

Yes, I had D554. I have also no idea what that firmware was suppose to improve.

Yes, LHD car

Some Dutch QQ owners upgraded to D605, afterwhich the radio doesn't turn off anymore when opening the left door and leaving the car. I upgraded mine to D554 instead. the radio will turn off after 10 mins if door has been open or not ;) I have updated to the D605 and the radio is turning off normally.

dzanas69 wrote: ↑Fri Mar 20, 2020 12:13 pm Witam, jestem nowym użytkownikie QQ J11 ( drugim właścicielem) i proszę o odpowiedź, czy ten sprzęt nadaje się do aktualizacji oprogramowania na D554?

Tak.