NO, you need to remove wiper arms and remove about a dozen screws that take off the panel in front of the windshield, with panel off there 4 bolts that you remove under the panel and you have open room to get to the back plugs. It takes around 2 hours,
I need more information about year, make, engine size.
Places such as Wikipedia will give you a good outline of the functionality of spark plugs. If you need more in depth information on actually maintaining and changing the, go to ehow.com where there are good guides.
Check the Vehicle Emission Control Information ( VECI ) decal located in the front of the engine compartment ( it will show what type of spark plugs to use and the spark plug gap )
NGK platinum plugs
from the bottom ,behind the sub frame.for the three rear plugs.
If you remove the windshield wipers and the plastic cowl you can easily get to the back 3
Changing the plugs and plug wires correctly has nothing to do with nor can it cause an oil leak.
Obviously- the spark plugs were not the issue :)
yes
== ==
No. There is nothing involved in changing plugs that requires or draws electrical current.
I believe the dealership gets 190.00 time and plugs