My 2009 King Ranch 5.4L alternator bearing is starting to make noise. I took it to the Ford dealership and they said it is putting out the right voltage but the bearings are going bad. I told them to not replace it as I think replacing it is relatively easy and I can save some money.

My question is: What alternator is the best replacement? New or Remanufactured and what brand alternator will last the longest. There are TONS of remanufactured alternators available and I have no idea if I should just shop price or quality. I believe my alternator, which is a 9L3T-10300-CB is 150 amp

 

The BEST is a new OEM Motorcraft. However, I'd take a chance on a reman from a local parts store if it has a lifetime warranty, it's going to be a lot cheaper. I have an O'Reilly's reman in mine with no issues.

 

Got a reman alt from Napa for my old 97 F150 and it was good for the 10 years or so it was in the truck. (the OEM one went out around 2003 and I traded the 97 in Jan of 2014)

Mitch