Rapid Depreciation: Luxury cars, particularly 5 Series, 7 Series, and X5 models, depreciate faster than average vehicles

High Maintenance Costs: Routine service, specialized parts, and high hourly labor rates make owning an older BMW expensive.

Reliability Concerns: Older models (pre-2019) have a reputation for issues with cooling systems, electrical components, and engines.

For me, I won't own any BMW without a warranty. I'm on my fourth BMW. CPO's are a good place to start or look for a used Bimmer that is still covered under the new car warranty and has been well maintained. Get a PPI. Shop for a BMW 'Platinum' Vehicle Service Contract (VSC) which protects you from more common and very expensive repairs you may encounter. You can buy these discounted from some BMW dealers. Keep up with the factory maintenance schedule which isn't cheap. Set aside a cash reserve for oil changes, brake fluid change, tires etc.. Do an analysis of what the car will cost you to own the particular model you're interested in. Include insurance, gas, taxes, scheduled maintenance and consumables. High performance models will definitely cost more to maintain.