OK after calling and calling this is what i got the serpentine belt on a 2003 f150 5.4L w/air is a 6 rib belt #060990 and is the same as a 2002. They make a 8 rib as well not sure why they went to 6 rib but thats ford for ya.Hope this help's someone other then me.

John

 

Why not go to a Goodyear Gatorback belt? You'll never have a squeal problem again and is soooooooo much better than stock!!

 

Gatorback is the way to go. 27 bucks at Autozone and very high quality.

 

I DID go to GY gatorback that is what i was calling all around for no one had a listing for 03's yet but i got it from Mike the superchip guy and it was cheaper then Autozone.

John

27.00 that's good they told me 44.00 for a 8 rib 99"

 

Just don't go to the dealer to do it!
My dealer quoted me $180 for a new serpentine belt on my '97 5.4l!!!

Naturally, I told him to FOAD!

 

Lightnings still use the 8 rib belt.

 

OK that helps me out I was just curious about priceing so I got on the phone to get some pricing on the Gatorback and at Autozone I got a price of 28.99 so I called another place that beats auto zone usaully on parts plus they carry a better quailty and they gave me a price of 60.00 then I told the guy well Autozone had it for 28 and he tells me well there lying to you list on these is over 70.00 . So I call Autozone back to double check and it is 28.99 they also sell a Kelly Springfield which I hear is good but it costs 32.97 Looks like its off to Autozone to order my gatorback. By the way anyone using a Kelly Springfield?

Richard D.

While your here check out my gallery:
https://www.f150online.com/galleries....cfm?gnum=2479