CALL THE MANUFACTURER
School Bus DPF, DOC, and EGR Cooler Replacement
Auto-jet stocks diesel particulate filters, diesel oxidation catalysts, and EGR coolers for school bus engines across every major make: Cummins, Navistar, Caterpillar, Ford, and GM. Emissions hardware is matched to the engine, not the bus brand, so the OE number off the failed part is the fastest way to the right replacement.
Why Engine Determines Fitment, Not Bus Brand
A Navistar International EGR cooler and a Ford EGR cooler are never interchangeable, even on the same body style. DPFs and DOCs follow the same rule. Provide the OE number stamped on the housing, or the engine make and model, before ordering.
DPF and DOC Replacement
Diesel particulate filters and oxidation catalysts for the engines school bus fleets actually run. Example: DPF665C91 (Navistar International, cross-references 2596665C91 and three additional OE numbers). Search the complete DPF and DOC listing on the parts catalog.
EGR Cooler Replacement
EGR coolers wear out with duty cycle, not mileage alone. Auto-jet stocks EGR coolers for Navistar International, Ford, and mixed Ford/Navistar applications. Examples: ICEGR444 and ICEGR542 (Navistar International), FRDEGR464 (Ford). Search the complete EGR cooler listing on the parts catalog.
Frequently Asked Questions
Does a DPF or EGR cooler fit by bus brand or by engine?
By engine. The same bus body can carry different engines across model years, and the emissions hardware changes with the engine, not the body.
What information do you need to confirm a DPF, DOC, or EGR cooler match?
The OE number stamped on the failed part is fastest. Without it, provide the engine make, model, and the bus's model year.
Do you stock emissions parts for buses running Caterpillar or GM engines?
Yes. Auto-jet's emissions coverage spans Cummins, Navistar International, Caterpillar, Ford, and GM school bus engines.