Cummins 5398181 Oil Dipstick Assembly

The Cummins 5398181 oil dipstick is an OEM-engineered component designed for precise engine oil level measurement on Cummins ISB5.9 5.9L diesel engines. It serves as a direct replacement for the factory-installed dipstick on Dongfeng Cummins and other B-series engine applications used in heavy-duty trucks and construction equipment. Constructed with a calibrated steel blade and a heat-resistant polymer handle, the dipstick features distinct low and high level indicators to ensure accurate lubrication system monitoring. The component interfaces with the engine block dipstick tube assembly, which is sold separately. This part carries Cummins OEM part number 5398181. It is compatible with 5.9L 24-valve ISB and select 12-valve 6BT configurations where the oil pan and tube geometry match the ISB5.9 specification. Installation requires no tools; verify oil level on level ground with engine stopped.