I and "my family` had Japanese cars in the past, and BMW since about 2000/2001. I am currently driving the only BMW I`ve ever had under warranty. For quite a while (like 11 years until it was totalled by a red light runner) I had a 1998 E39 528i with sport suspension and MT (also with the M52 engine, before the changeover to the drive-by-wire M52TU) and my dad had an E39 540i with normal suspension, automatic. The "same" car, but couldn`t be more different. The V8 had quite a few "issues", but they were also well known issues that we could have seen coming. He had an extended warranty so he always waited for everything to break, got a tow, and got it fixed at the dealer, and showed me the invoices to justify the cost of the warranty. My approach was more like I saw the warning signs, could order an OEM part online for $180, and I fixed it on a Saturday morning in my garage before it broke.
I always categorized my car spending and time into maintenance (oil change, repack belt bearings, replace belts, brake fluid, brakes, battery, water pump, shocks), repair (oh no, something failed and I need to fix it) and restoration (replace seat cushion foam, replace a wearing bushing or ball joint). I had very little in the repair column. A $15 thermostat housing (twice), frayed wires in the wiring harness to the trunk (DIY for free), a crankshaft sensor that didn`t strand me I just got a CEL. That might be it.
In my experience at the time, I found that Japanese cars seem to "break" less, but were also less "durable". I like to corner, brake and accelerate - I like to drive. My current is my first automatic ever. I like to shift where it "sounds nice" and is in a rev band where there is some throttle response, I rev-match heel-toe downshift into every single turn etc.... I shift leaving time for the synchros to work, I warm up the oil before driving spirited, I don`t dump the clutch, and I roll onto the throttle (even if it`s to the floor) and squeeze on the brakes. Driving like this seems to be what German cars are made for, but I`ve found it might be "abuse" based on how Japanese cars, at the time anyways, are designed. I had more ball joints wear out, bushings etc.. on Japanese than German. When you hold a wishbone from each in your hand, the Japanese part was unsubstantial by comparison. (just my experience).
I won`t even get into how hard it was to find RWD, manual transmission and four doors without going German... I don`t plan on going back to FWD. Layer on things like the steering - heavy, precise and lots of feedback. The Japanese weren`t designing for that. This is something BMW is failing on lately (IMO) - they`re designing with `dead` steering requiring less effort, providing little feedback and often using racks that are too slow. It`s not exclusively the fault of electric assist steering - it can be VERY good. I think the design target has changed. My current BMW (F10 535) is not nearly as engaging as E39, E46 and E90.
That all being said, a friend has a 2009 Sienna with 240,000km or so and has done hardly anything to it - oil, batteries, brakes, fluids and filters. I`ve told her "be prepared". About a year ago was the first big bill - steering rack due to leak, broken front spring. Got a new rack and new front struts. It`s held up extremely well for her, but others with essentially the same vehicle haven`t had nearly the good luck she`s had so...