Cummins 4089542 Rear Crankshaft Oil Seal & Wear Sleeve Kit - New / NOS

Genuine Cummins Rear Crankshaft Oil Seal Kit, OEM Part No. 4089542, in the original factory Cummins SmartPower packaging.

Application: Cummins 4089542 is catalogued as a rear crankshaft seal kit for the Cummins L10 / M11 / ISM / QSM11 engine family, including QSM11 marine applications. Application is not verified for your specific engine — confirm by engine serial number before ordering.

Condition: New / NOS (new old stock). Unused genuine Cummins part in the original sealed packaging; the packaging is dated 2002 and shows shelf wear, dust and soiling from long-term storage. The seal and mounting flange are shown in the photos along with the included hardware bag. No testing is claimed or implied.

Sold by photographs, the factory label, identifiers, and measured dimensions. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase.

Quote is subject to final fitment confirmation by engine/transmission serial number, part number, photos, and supplier availability.