Best Year to Buy a Bmw M550i
Reliability rankings across 4 model years, based on NHTSA owner complaints
Based on 4 model years of NHTSA complaint data, the 2020 Bmw M550i is the most reliable year to buy with a Klunk Score of 100/100 ("Smooth Ride") and only 2 owner complaints. The 2018 model year is the least reliable with 22 complaints and a score of 95/100 ("Smooth Ride").