I bought my car, new, off the lot. It currently has just under 85k miles on it. For the first five years, it behaved beautifully.
I've always had my vehicle serviced by Nissan dealership garages.
2 summers ago, on particularly hot days (by Seattle weather, anyway!) my car would stop, suddenly, in the middle of city traffic (never of the freeway). After a few attempts to restart it, the engine would sputter to life long enough to move it off the road before a tow truck could get me to the Nissan dealership. To the tune of $129 a pop, each time, they could not diagnose the problem.
Over the past 5 years, the service engine light has appeared almost daily. I've taken it into the garage several times, paid $129 for diagnostics each time, and have generally been told there's nothing wrong with the car (though, to be honest, once, they thought the gas cap was on too tight).
All that changed last week, when I took my car in for an oil change, heater check and a handy-dandy, "free" 100 point inspection. I was told I need a new catalytic converter - to the tune of $1029.66. (It may or may not be worth noting I've never failed an emission test).
Also, starting at the end of last winter, the heater stopped blowing hot air in stop/go traffic. Once I hit the freeway, it's fine. Last week, as part of the overall check up, I was charged $64.50 to diagnose the issue. They find no sign of leaks, but recommended a cooling system flush for $169.95.
Also, as part of said 100 point inspection, they recommend a valve cover gasket replacement ($176.04), a transmission flush ($230 - which I seem to pay for annually) and a throttle body service cleaning ($74.50, for a sticky gas pedal).
Today, I took my car to a local mom/pop shop to check out the service engine issue. They said it was either the 02 sensors (my car has 4) OR the catalytic converter. To replace the CC, they've quoted a price of $698. However, they confirmed it's as likely to be an issue with the O2 sensors as the CC.
In reading these boards, it may be one, both or neither issue and I'm not quite sure what I'll do next.
There are many things to love about my car, and I suppose I should be grateful it's performed so well, generally, for the last 10 years.
It still looks quite good; both the interior and exterior have held up very well.
However, with only 85k miles on it, it seems I should be able to expect more than quarterly visits to my local garage to troubleshoot issues they may or may fix.