This John Deere alternator 12V 40A AM878581 for 3012 3015 4475 5575 6675 7775 4020 is an automotive replacement part manufactured by John Deere. It restores proper function to the vehicle system it belongs to, replacing an OEM part that has reached the end of its service life. Key specifications noted on this listing include 40A. It is commonly in automotive service shops and DIY vehicle repairs.
