Description
Mercedes-Benz OM904 engine (2017-2025)
The “904” in your query refers to the OM904 engine, a 4.2L inline four-cylinder turbodiesel manufactured by Mercedes-Benz for its Atego range of medium-duty trucks. These engines were used in Atego trucks from 1996 onwards. The OM904 was also used in some bus and bus chassis applications.Â
The Mercedes-Benz OM904 engine is a 4.2-litre inline-four turbodiesel engine primarily used in the Atego medium-duty trucks, with production beginning in 1996. Remanufactured OM904 engines, often with an EGR system, the engines in late-model trucks (post-2017) are typically from a newer generation, such as the OM934 engine family.Â
The OM904 has been significantly revised over its long production run, so a 2017–2025 engine would have a different version of the OM904 than earlier units and likely include updated emissions technology, possibly reaching Euro V standards.
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