Your spark plug manufacturer would recommend your replacement schedule.
The 2006 Nissan Quest takes a special 14" rear wiper blade which is often difficult to find in stores. See sources and related links below for more information.
94 Quest doesn't have a serpentine belt, just three belts for alt, AC and water pump.
Not often if there tarting to wear and tear you should replace them.
30,000
How often should you change water pump in a boat
Replace headlight bulb only when blown.
factory recomends every 30,000 miles or 60,000 if you are running platinum plugs.
I've heard you should replace your pillow when you can bend it in half without it bending back.
all the time
about every 75000 miles
Every 60,000 miles.
Replace it when it becomes cracked or frayed.