Download PDF Guide: Download PDF Family Plate Location Guide
The EPA engine family name is a 12 character number/letter designation included on the engine nameplate for all heavy duty truck engines sold in the United States. In general, the nameplate is permanently affixed to the engine. The exact location and appearance of the nameplate varies by engine manufacturer. Examples of nameplates from three major engine manufacturers are included below:
Caterpillar Engine Example
Caterpillar Nameplate (2 labels): EPA Family Name – 5CPXH0928EBK
Engine Model Year – 2005
Engine Horsepower – 475 HPV1.0 02/08/2010
Cummins Engine Example
Cummins Nameplate: EPA Family Name – 4CEXH0912XAJ
Engine Model Year – 2004
Engine Horsepower – 400 HP
Detroit Diesel Engine Example
Detroit Diesel Nameplate: EPA Family Name – 5DDXH14.0ELY
Engine Model Year – 2005
Engine Horsepower – 515 HP
