I had it serviced for a noisy belt tensioner, and figured I'd have the spark plugs changed. Walked away with a 1000$ repair bill due to the funky spark plug location that took 20 hours labour to remove. Stay away from the 5.4 3V.
I own a 2003 F150 fx4, and yes the spark plugs are a pain in the butt to change. I will never do them on my own again.
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