Kubota KX033-4

Browse aftermarket replacement parts for the Kubota KX033-4 mini excavator. Kubota 4 Series 3.4-ton conventional tail swing mini excavator with Tier 4 Final emissions and D1803-CR common rail engine.

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 KX033-4 Mini Excavator

The KX033-4 is the 3.4 ton class entry in Kubota's current 4 Series mini excavator lineup, the conventional tail swing counterpart to the U35-4 minimum tail swing 3.5-ton sibling. It uses the D1803-CR common rail engine with Tier 4 Final emissions compliance, refreshed RD451 generation cab and operator station, and updated hydraulic auxiliary plumbing. The KX033-4 hits the popular 3 to 3.5 ton size class that has become a workhorse for residential, utility, and small-contractor applications across North America.

The KX033-4 shares many service parts with the KX040-4 (the 4 ton conventional tail swing sibling) and with the U35-4 (the 3.5 ton minimum tail swing sibling) because Kubota engineered the 4 Series on a shared parts platform with the D1803-CR engine family. Cab glass on the KX033-4 cabin variants uses the RD451 series dimensions, shared with the U35-4 and KX040-4.

Common Replacement Parts for the Kubota KX033-4

Fuel system service uses Fuel Filter Cartridge RD819-51280 as the D1803-CR primary fuel filter. Cab Air Filter 6A671-75090 covers the KX033-4 cabin climate system, shared with the U35-4 and KX040-4. Engine service uses Oil Gauge Plug 1G513-36550 and Guide Oil Gauge 17456-36420.

Cab and operator service includes Fuel Cap R5611-51120 with the lockable variant covering theft prevention, Rear View Mirror 36919-53340, and Ignition Switch RC461-53960. Small assembly hardware including Shim RD451-19180 covers routine cab and hydraulic assembly tolerance service. Many KX033-4 service parts cross to the U35-4 and KX040-4 because Kubota harmonized cab and electrical components across the 4 Series.