ESN Lookup
Identify the manufacturer and model series from a diesel Engine Serial Number.
ESN Breakdown
6NZ58131
Caterpillar Inc. is an American corporation headquartered in Irving, Texas, and is the world's largest manufacturer of construction and mining equipment. Founded in 1925 through the merger of Holt Manufacturing and C.L. Best Tractor, Caterpillar exited the on-highway truck engine market in 2010 but remains dominant in off-highway and industrial applications.
ESN Format
Caterpillar ESNs use a prefix-code system where the first three characters identify the engine arrangement (model family). For example, "BXS" and "6NZ" both indicate C15 engines but from different build configurations. The remaining digits are the sequential serial number within that arrangement.
Manufacturing
On-highway engines were built in Mossville, Illinois (now the Caterpillar Mossville Engine Center). Off-highway and generator engines are built in Lafayette, Indiana and Griffin, Georgia.
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