Holset 3804802 Turbocharger Assembly

The Holset 3804802 is a BHT4C / BHT3E model turbocharger assembly manufactured by Cummins Turbo Technologies under the Holset brand. It serves as a direct replacement for Cummins OEM part numbers 3538398 and 3525998. This unit features a wastegate-actuated turbine housing constructed from high-nickel cast iron for high-temperature resistance and an aluminum alloy compressor housing. The rotating assembly utilizes a journal bearing system lubricated and cooled by engine oil. It is engineered for the Cummins N14 engine series (including NTA855-R, NTA855-G4, NTA855-G5, NTA855-G7) and Onan generator set applications. The turbocharger delivers precise boost control for heavy-duty diesel performance, meeting OEM specifications for airflow, pressure ratio, and rotational dynamics.