Had one for a while, only 150000kms, fully serviced. Pros: - Decent power - Excellent handling at high speeds - Impressive maneuverability for its size - Seats are very comfortable and adjustable - Electrics are somewhat reliable for its age - Parts are not as expensive as people exclaim Cons: - Horrible gearbox in terms of performance and reliability (ZF Auto trans, manual is basically impossible to find for the early model E60) - Mediocre and expensive suspension system - Fragile aluminium front 1/3 and highly fragile subframe system - Engine is falsely proclaimed as 'bulletproof' by enthusiasts - the M54B30 is the definition of untrustworthy and uncertainty - M54 requires constant repairs due to cheap Chinese plastic parts, water pump, thermostat, DISA valve, PCV, Coolant reservoir, OFHG, HPFP, Throttle bodies, camshaft issues and fuel injection issues just to name a few of the almost certain problems to come. Overall, since you have to spend thousands of dollars and hours of stress it is NOT worth it. The amount of headaches are on par with the S85 V10 e60 M5 which actually gives reward back in performance unlike the 530i.

It’s a very nice car, it run good for it’s age. I purchased it just for fun. I use it mostly on the weekend and my days off

Expect to get 220,000 additional miles with repair investment on worn out gaskets and leaking fuel tank. $2800 for repairs + $7000 for purchase over 12 years is less investment than my 2015 Flex with very expensive brakes/tires/general maintenance and regular schedules repairs. Gas mileage is much better than Flex.