Overall, the 2016 BMW X3 xDrive28i M Sport is considered a reliable used luxury compact SUV, a key trait many prioritize when searching for used cars. Some common problems have been reported with its N20B20 engine, such as oil leaks from aging seals, occasional cold-start diesel-like noise, and potential failures in the variable valve timing system. Transmission-related issues like minor shifting noises or fluid leaks may also occur in higher-mileage used cars. However, this specific used BMW X3 has only 60,000 km on the odometer, holds a top-tier inspection certification (Dr. Check S-grade), and is verified as a non-accident, non-flood, non-fire-damaged car, indicating it has been well-maintained and is free from major mechanical faults. This makes it a standout option among reliable used cars for buyers looking to buy used car models with peace of mind.