AVOIR scores the 2026 BMW M340i xDrive Sedan's longevity 67/100 (good), estimated from high-mileage survival data and resale-panel evidence of how far these vehicles actually run.
AVOIR scores the 2026 BMW M340i xDrive Sedan on maintenance 41/100 and depreciation 63/100 — higher is better (lower real cost) — plus fuel, insurance and resale in the full breakdown above.
See all 2026 BMW 3 Series trims & reliability scores.
AVOIR scores every vehicle across 7 ownership factors using EPA fuel-economy data, NHTSA safety & complaints, IIHS ratings, and a proprietary used-market resale panel.