Kubota KX91-2

Browse aftermarket replacement parts for the Kubota KX91-2 mini excavator. Second generation Kubota K Series 3-ton conventional tail swing mini excavator, the predecessor to the KX91-3 that replaced it in the early 2000s.

Use filters or search by OEM part number to find the right part. Compatibility details are listed on each product page.

Parts Compatible with the Kubota KX91-2 Mini Excavator

The KX91-2 is the second generation 3 ton class entry in Kubota's K Series mini excavator family, produced from the mid 1990s through the early 2000s before being replaced by the KX91-3 third generation. The KX91-2 is a refresh of the original KX91 with updated cab and operator controls, but retains the original D905 era mechanical injection diesel engine and direct-drive hydraulic main pump architecture. Customers commonly find KX91-2 machines still in fleet service in landscaping, rental, and municipal applications because the simple drivetrain and robust internal engine components support long service lives.

The KX91-2 shares many service parts with the KX71 (the 2.6 ton sibling in the same era K Series lineup) and with the KX41 (the 1.4 ton sibling), because Kubota engineered the second generation K Series on a shared parts platform with the small displacement D905 engine. Successor KX91-3 service parts generally do not cross because the KX91-3 introduced a different engine cooling and fuel filter package.

Common Replacement Parts for the Kubota KX91-2

Engine service is the largest order category for the KX91-2. Engine Oil Filter W21ESO1600 (and the alternate 16271-32092 and 1627132090 aftermarket revisions) is the primary spin-on lube filter that fits the KX91-2 across the production run. Fuel Filter 15831-43380 covers the fuel system primary filter on the D905 mechanical injection variant.

Internal engine service uses Glow Plug 16851-65510 (original mechanical injection cold start service), Stud 16241-91490, and Cylinder Head Gasket 16394-03310. Cooling system service uses Thermostat Gasket 15676-73270 and Water Pump 16251-73034, both of which are common service items as these machines approach the end of their second or third water pump cycle. Many of these internal engine parts cross to the KX71 and KX41 (1990s K Series siblings) and to other Kubota equipment powered by the same era D905 engine family.