 First, the motor runs great at 140K. The trans has started making noise. Undrivable right now. When I replaced one of the xenon headlamps, I had to pick my jaw up off the floor, we're not talking about the whole assembly, just the bulb itself.  At the Nissan dealership in Victorville, CA $258.00 for the bulb!!  Can you believe it?  I went on line and found the cheapest to be $159.00  My suggestion for someone who may not want to pay that much is when the xenon goes out, run your brights instead of replace.  Bright bulbs cost $8. Oh, the spark plugs are internal.  Tune up costs $418.00 to replace 6 spark plugs.