Some popular searches for new owners:
chain guidesmafq45techt3injectorstranny cooler
I think there's a shop or mechanic in NJ that has experience doing chain guides. You might want to search for that.
On my 92 Q45, I had to replace the compressor, receiver-drier, fan switch, belt, pulley, swap out the clutch, then do a full flush and recharge with R12. I think it cost me just under a grand.There's also a wide variety (as Dennis said) of electronics and sensors on top of the basic components. Lets not forget the condensor (there's a used one now on eBay, but who knows if its any good.)
Wes showed me how to check the codes:http://www.nissaninfiniticlub....essor
I spent 4 grand on my 92 Q in a year (bought at 169k, sold at 183k), and its been the most worthwhile $4000 I've ever spent (despite what my Mom says).Before you have a heart attack, I should emphasize that I do absolutely none of the work on my own AND I usually go to the dealer. Most people get away with $1000-$2000 a year depending on what they do on their own and depending on vehicle condition. The step by step information on this forum will save you thousands of dollars, along with the guidance of the factory service manual.
Here's my maintenance log:
http://q.spilky.com/irl.xls--It needs to be updated to reflect new information I got from a VIN check at a dealership in Oklahoma.
I strongly suggest getting remote start, giving the Q a chance to properly warm up every morning before work or every evening before the ride home. Doing so should extend its lifespan a bit. Of course, prior to doing that make sure all cooling related hoses, fluids, and components are new or in very good condition. You wouldnt want to walk out of your office on a hot summer day and find a dead, overheated Q.
And why did I sell mine, you ask? To buy another one but in better condition.
Check out the underside of the driver's seat. There's a fragrance unit in every 90-93 Q45 to maintain a like-new smell. Neat, isnt it?
Flush the transmission -- I strongly suggest Mobil 1 ATF. Shifting seems to be crisper and more subtle with M1, and its more capable of withstanding high operating temperatures. Your dealer or a shop might recommend against it, since Nissan documentation calls for a standard fluid, but trust me on this one. Also, drop the pan and change the transmission filter.And while youre at it, add a transmission cooler. The part is $40, and labor is only an hour. A popular cause of Q45 transmission failure is simply overheating.
The rule of thumb with the Q (and probably anything short of a unicycle) is that the more you spend to maintain, the less you spend to "fix"
Enjoy.
-Jesda