Kubota KX161-3

Parts Compatible with the Kubota KX161-3 Mini Excavator

The KX161-3 sits at the top of Kubota's legacy 3 Series mini excavator lineup, the largest conventional tail swing machine in the family. Three production generations exist under the KX161-3 designation, distinguished by serial number and emissions tier: the original KX161-3 (S/N 20000 through 29999), the KX161-3S "Super Series" with revised hydraulics covering an unusually long S/N 30000 through 69999 production span, and the KX161-3ST "Super Series Tier 4" covering S/N 70000 onward where Kubota added Tier 4 emissions compliance. The platform was eventually replaced by the current 5 Series KX057-5 in this size class. Many KX161-3 cabin variants run with the same RC411 series cab glass that fits the KX121-3 and KX91-3 cabs in the same generation, since Kubota carried the cab structure forward across all three 3 Series mid-frame machines.

The V2203-M-EBH-2 engine in the KX161-3 also powers the KX121-3 in the same generation, so engine service parts (oil filter, fuel filter, water pump, glow plugs) cross widely between the two models. Hydraulic system components are largely shared between KX121-3 and KX161-3 chassis, with the larger machine using a higher capacity main pump but the same control valves and many of the same hose fittings. The Tier 4 emissions update introduced on the KX161-3ST changed the fuel injection pump and added emissions sensors, so verify your machine's full model designation including any S, T, CA suffixes against the part listing before ordering fuel system components.

Common Replacement Parts for the Kubota KX161-3

Engine cooling and water pump service is a core category for this model. Water Pump 1A051-73410 is the current revision part, with the older 1A051-73030 version covering pre-S production runs. Thermostat Assembly 1A021-73012 fits across all three generations. Starter 17123-63016 is the V2203 starter motor used across both KX121-3 and KX161-3 production runs and is one of the most ordered electrical service parts on the platform, particularly on KX161-3 units that see heavy daily start cycle use in rental and contractor operations. Engine stop solenoid 1A021-60013 covers the V2203 engine across all variants. Inner Air Filter R240142289 is the safety element that pairs with the primary canister, and Cab Air Filter 6A671-75090 covers the cab climate system on cabin variants. Fuel Filter RA211-51280 fits the V2203 fuel system across all KX161-3 generations.

Cab glass replacement uses the RC411 series part numbers detailed on the Kubota Glass page (RC411-46540 lower door, RC411-46530 upper door, RC411-46710 right hand sash, RC411-46330 front lower, RC411-46112 front upper). Smaller assembly hardware (Oil Gauge Plug 1G513-36550, Guide Oil Gauge 17456-36420, Shim RD451-19180, O-Ring 04817-50300, Washer 04512-50080) is typically ordered alongside larger service parts.