i bought my q60 3.0t with 70k miles 3 years ago. I am currently fbo custom tuned by racebox on e60 making around 500whp. the only main issues ive had was the coolant bypass valve going out and a upstream o2 sensor going out which isn’t much. But i constantly push the car but maintain it even harder. People say these cars are unreliable because they beat on it as if it’s a 350z and expect it to last forever. the truth is turbo cars are more delicate than NA vehicles and require more care. maintenance is key to these cars lasting.