When evaluating buy used cars, reliability and maintenance cost are critical factors, and the 2022 Denza D9 DM 970 4WD Flagship—one of the reputable models from Chinese electric cars manufacturers—excels in both areas. Leveraging BYD's mature plug-in hybrid technology, the Denza D9 DM series has a strong reliability track record, making it a trustworthy choice among hybrid cars. The high-voltage battery is covered by an 8-year/150,000 km factory warranty, reducing concerns about battery degradation and helping preserve used car values over time. Routine maintenance costs are affordable: oil changes and basic inspections average $140-$180 per service, comparable to conventional mid-size MPVs. This specific vehicle is a one-owner used car with zero accident history, original factory paint, and only 57,000 km on the odometer, ensuring excellent long-term dependability with proper care—ideal for anyone seeking reliable used cars that won’t break the bank on upkeep.