My dads F150 is on it's 4th Napa/Autozone alt. They don't offer a lifetime warrenty on his anymore, 3 years I think.

I just went through this, I ordered a $200 alt from Autozone and it wasn't even a Bosch rebuild, some China crap. It didn't even have the right shaft in it, I returned it and bought a proper one from Fastlane. Fastlane sells very nice Bosch rebuilds and it cost me $200.

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2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200