BMW X5 Reliability Guide 2026: Proven Years, Common Problem Spots If you want the most reliable BMW X5 years right now, target 2025–2026—especially the six-cylinder 40i. Independent ratings show the 2026 X5 earning an 81/100 predicted reliability score in J.D. Power data summarized by TopSpeed, while Consumer Reports expects the 2026 X5 to be more reliable than average. That combination makes the latest non-hybrid trims a safe, balanced pick for performance, features, and upkeep. The 50e plug-in …