Mazda 6 (2013 - 2022) 2.2d SE-L 4d Auto Owner Review

Bought in July 2018 with 23k miles. Unfortunately I had to go to Mazda dealer few times with flickering Sat nav which was never fixed, rear window heating very poorly, dual air con doesn't work properly, extremely noise when you drive over 65m/h, and recently engine's RPMs are jumping up and down when it's idle or I'm driving constant speed around 30m/h -Mazda Technician diagnosed carbon deposition on engine and EGR valves which will cost me around £700. Obviously car was serviced in Mazda all the time.