Keep your John Deere 1010 (SN: 31001 & up), 2010 (SN: 29001 & up) tractor / crawler starting with our new, original old stock JDS3257 OEM Bosch© glow plugs. Made in Germany, these are the same glow plugs that John Deere used when they built these tractors! Check thread size before ordering as early serial numbers used a larger thread and wrench size. 4 are used per tractor; Sold individually. View details >>