OK. If it is a 4 cylinder take it to the shop and have them do it. If you have about 60K miles on the car, they will do it for free.
To tell if it is a four or six cylinder, go open the hood and count how many spark plug wires you have. If you count 4- you have a four cylinder, if you count 6, you have a six...
Or even easier, if it says "Zetec" on your engine, you've got the 4 banger like me If you've got Duratec on your engine, you've got the V6, the one I realized I should have bought months later, after driving my girlfriend's V6
If you've got Duratec on your engine, you've got the V6, the one I realized I should have bought months later, after driving my girlfriend's V6