My wife had a 2002 Jetta TDI that was in the shop more often than not. That did it for us.
I had a bug way back in '64 and a Squareback of early '70s vintage. Both were trouble free. In fact, I sold the Squareback to a medical lab I represented, and they drove it as a delivery vehicle for about ten more years. I'd see it around town from time to time. I bought an Audi then. Boy was that a mistake. It had a Solex carburetor, which was designed with an eye towards meeting the first ramp-up in emissions. Problem was it was rough and stalled a lot in town driving. I don't know how many Saturdays I spent with that carb broken down on my picnic table. The only solution was over-sized jets. However, then, the mileage took a plunge, although it improved the pep by the engine a lot. I traded it in when I'd had it less than two years on a Benz diesel, which is what a drove over the next 30 years. The 2004 Passat, which was Liz's, didn't give major problems until it was about 8 years old. However, I do a lot of my own work and the Passat, to me, seemed to have been designed to be hard to work on. An example is changing a headlight. We were out on Hatteras Island when a headlight burned out. The two wives had had to drive all the way down the island from Norfolk, about a 3 hour drive, with only brights, to the irritation of oncoming traffic. My friend and I went out and bought the new bulbs the next day and I had the service manual with me. The first step is to remove the bumper. I crawled under and Bob said "Earle, I think I can work my hand in there." Turned out that, with his larger hand, he couldn't, but I could. All the other jobs were the same, even little things like changing brake pads. Not my favorite car and glad to see it go...