The timing chain guard has been chewed up and it makes a noise when starting.
Water pump just went out (regular maintenence)
Driver's side seat starting to tear.
Stereo too small.
In car noise is somewhat high. (the exhaust is loud on the inside of the car, mainly I guess because it is a performance exhaust, but it was still somewhat loud then)
The fuel injectors were cracked.
The oxygen sensor went bad, but it was the cause of a bad connection at the airflow meter (my error)
3rd brake light just won't work for some reason, maybe a defect?
Overall the car runs and drives great. It has four wheel independent suspension, and it is a rear-wheel drive thus it is a lot of fun. I've taken it racing several times and run the crap out of it, and it still runs great (much to everyones surprise). I've upgraded the intake as well as the exhaust, and I'm going to put a 300zx differential for a different gear ratio. The suspension handles wonderfully, worth noting twice, and the interior is nicely shaped.
This car was so enjoyable to drive, and reliable too. Shop visits were mainly from wear and tear. The interior and exterior are designed nicely. A little small for 6 footers. Not a good snow and rain car as many have noted here. Still, not surprised to see many here with over 150K miles on their vehicles.
This is my second 240sx... got it at 120k miles. 180k, plowed through a deer at about 105mph. Up on 2 wheels and all, swapped body panels from my old one and it was good to go. 190k throw out bearing started squealing and grinding. Here's the good part... 199,370ish miles and the clutch starts slipping. Now being the complete moron that I am, I decided to be stubborn and try to make it to at least 200k. Being a wonderful Nissan... of course it made it successfully. Now I've got the 5 speed from my '89. Higher gear ratio is nice and makes quite a noticeable improvement, but the car is still not quick enough. Now as far as handling and dependability...amazing. Little weight reduction, some bigger tires and a couple of Webers should make it a very nice everyday driver. nissan4ever.