Kubota D902 Diesel
The current Kubota small diesel — cleaner emissions than the D722
The story of this engine
The D902 is the D722's replacement under modern emissions standards. Same essential engineering, refined for cleaner combustion and Tier 4 final compliance. Powers the current Kubota G26-II range, the BX2380 and BX2680 sub-compacts, plus the entry ZD diesel zero-turns. Same dealer network as D722 — service parts share many items.
Why owners like it
- Cleaner-burning than D722 — qualifies in current and forthcoming UK emissions zones
- Same 8,000+ hour service horizon as the D722 it replaces
- Electronic shutdown and monitoring as standard from late 2018 onwards
- Higher torque output than the D722 from the same physical footprint
Where it falls short
- Electronic dash and emissions sensors add new failure modes vs the D722
- Most expensive serviceable parts in the small-diesel category
- DPF (diesel particulate filter) regen cycles require careful operation
- Dealer diagnostic tool required for some fault codes
Service intervals & costs
What this engine actually needs every year, and what it costs to keep alive.
| Interval | Task | Cost |
|---|---|---|
| Every 100 hours | Engine oil change — Kubota Super UDT-2 or 15W-40 | £20 DIY / £100 dealer |
| Every 100 hours | Oil filter | £18 OEM |
| Every 200 hours | Fuel filter | £28 OEM |
| Every 200 hours | Air filter element | £40 OEM |
| Every 400 hours | DPF regen cycle check | £0 DIY (operator-initiated) / £85 dealer |
| Every 2000 hours | Coolant flush and replace | £28 OAT coolant |
What goes wrong, and when
Every engine family has predictable failures by age. Knowing what's coming saves money on used buys and makes negotiation easier.
Parts cost reference
UK 2026 prices — OEM (genuine) vs aftermarket. Generic parts work fine on consumables; stick to OEM on anything that affects timing or tolerance.
| Part | OEM | Aftermarket |
|---|---|---|
| Oil filter | £18 | £9 |
| Fuel filter | £28 | £14 |
| Air filter element | £40 | £20 |
| Temperature sensor | £45 | — |
| DPF (Diesel Particulate Filter) replacement | £600 | — |
| Replacement engine (used 2500hr) | £2200 | — |
The modern Kubota small diesel and the right specification for any new commercial mower entering UK service. Emissions-compliant for current and forthcoming low-emission zones, with the same long-life build as the D722. Domestic buyers should consider used D722-equipped earlier ride-ons before paying the D902 premium.
Related reading →Mowers in our catalogue with this engine (4)
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