let me take a guess the left side are under the intake manifold. if im right that is a major pain in the butt to change.

 

Is this just a concern for down the road? How many miles do you have on the car and is there a Haynes manual yet for the 04 Maxima? If so, its a sound investment.

 

From the service manual, here are the steps:

1. Remove the engine cover using power tool.
2. Remove the intake manifold collector.
3. Remove the ignition coils.
4. Remove the spark plugs.
5. Install the new spark plugs.

 

http://forums.maxima.org/showthread.php?t=333370

 

How many miles do you have on the car? You should not need a change yet.

 

they are warranted till 105k miles

 

maybe he is putting some diffrent ones in, I don't know why you would, but to each his own huh..

 

Not like some spark plug change will give you any HP increase.....that is why I was wondering.

 

no just curious.