BMW 740i (F01)
The BMW 740i was one of the most popular cars of 2002 when the new model hit. From its outward appearance, the 740i was one of the most advanced cars on the road. BMW was implanting all kinds of new technology into the car, but much of this technology was not tested. The reliability of the F01 was among the worst of any BMW car that had ever been on the road. These cars were notorious for being in the repair shop more than they were on the road (via Hot Cars).
That’s not to take away from the driving capability or comfort of the car. But you’d expect to pay a lot of money to keep one of these on the road. There were better cars from the era that offered the same level of performance and luxury without the headaches. The Infiniti Q45 was one such car from the same era, with a powerful V8 engine and a spacious interior that swaddled the driver in luxury.