The right Kubota RTV900 seat replacement depends on the full model designation, serial number and the part that has failed. A torn seat bottom may only need a cushion; a damaged mounting frame, latch or seat-belt attachment needs a different repair. A listing that simply says “fits RTV900” is not enough.
For the original RTV900 variants explicitly listed below, K&M Manufacturing offers separate seat-bottom and backrest cushions, plus a two-cushion kit. For an RTV900XT, RTV-X900 or a machine with uncertain identification, start with Kubota’s parts lookup and have a dealer confirm the correct assembly. These are fitment-based options, not a claim that one replacement fits every RTV carrying the number 900.
Identify your RTV before ordering
Write down the entire model code, including suffixes, and the machine serial number. Kubota places the original RTV900 serial identification on the driver’s side frame rail, between the battery and cargo box. Its official identification guidance also directs owners of older equipment to a Kubota dealer for model-specific information and manuals.
- Original RTV900: Compare the exact suffix and serial number with the seat diagram. Do not assume an early RTV900 and a later G9 or W9 use an identical cushion and attachment arrangement.
- RTV900XT: Treat this as a separate fitment check. The common K&M cushion kit discussed here excludes RTV900XTG, XTR, XTS, XTT and XTW.
- RTV-X900: The X belongs in the model name. It is not interchangeable shorthand for the older RTV900, and an original-model bench kit should not be ordered for it without explicit manufacturer approval.
Use the seat section in Kubota’s genuine-parts lookup, then ask the dealer to resolve any serial-number break or superseded part number. There is no single serial cutoff in this guide that establishes compatibility across all RTV900 versions. A seller’s year range is only a starting point, especially if a previous owner has changed the seat.
Choose a cushion, a cushion kit or a structural repair
Seat bottom only: K&M / Uni Pro 8622
The manufacturer’s 8622 seat-bottom page identifies this gray vinyl, wood-core cushion as a replacement for Kubota K7611-56010. Its listed RTV900 applications are RTV900G9, RTV900R9, RTV900T9, RTV900W9 and RTV900W9SEA. The current listing describes a four-inch-thick cushion with a 44 by 15.5-inch footprint.
This is a sensible option when the backrest and original supports are sound but the bottom upholstery, foam or core is worn. It is not a new seat frame, belt assembly or latch. Confirm that the retained hardware and support structure remain serviceable before choosing the smaller repair.
Backrest only: K&M / Uni Pro 8624
The 8624 backrest cushion is listed for the same G9, R9, T9, W9 and W9SEA applications and cross-references Kubota K7311-56020. K&M specifies gray vinyl, a wood core, three-inch thickness and a 35.5 by 9.5-inch backrest.
Choose this only when the damage is confined to the backrest. A cushion will not correct a bent support, loose mounting point or damaged restraint attachment. Retaining a good seat bottom can avoid paying for components that do not need replacement.
Both cushions: K&M / Uni Pro 8621
The 8621 gray bench cushion kit includes the bottom and backrest. The current page describes a revised center indentation for the seat belts and explicitly excludes RTV900XTG, XTR, XTS, XTT and XTW. Its included-parts list names cushions, so do not interpret “bench seat kit” as a complete replacement frame with new restraints.
This is the more practical purchase when both padded components have deteriorated and the underlying structure passes inspection. Ask the supplier to confirm your full model and serial number, the current OEM cross-reference and what mounting hardware is included or reused.
OEM parts: the route for uncertain fitment or damaged supports
If the frame, hinges, latch, belt mounting or other structural components need attention, obtain a model-specific parts quote through Kubota parts and service. Ask for each affected component to be identified on the diagram. A quote for a “seat assembly” should say whether it includes upholstery, mounting brackets, hinges, hardware and restraints, rather than leaving you to infer the contents from a photograph.
Check mounting geometry, not just overall width
A seat can be the right width and still have the wrong mounting pattern. Before committing, compare the underside of the existing component with the supplier’s current technical drawing. Make a written record or clear photographs of:
- Mounting-hole centers in both directions, the number of attachment points and any offset from the edges
- The shape and condition of the supporting frame or pan, including raised sections and contact pads
- Hinge or latch position, where fitted, and the clearance needed for normal seat movement and service access
- Belt-buckle openings and the space required to reach and fasten each restraint
- Seated height and whether the proposed cushion would alter access to the pedals, steering wheel or controls
There is a useful caution in K&M’s own documentation: its current 8622 web listing gives the bottom footprint as 44 by 15.5 inches, while a linked product sheet gives 44 by 17 inches. The documents also differ on hardware wording. Have K&M confirm the current drawing and supplied parts before purchase; do not resolve the discrepancy by drilling new holes or forcing a cushion onto the frame.
For an online order, send the supplier the model code, serial number, underside photographs and the OEM number from the correct diagram. Request written confirmation that the specific SKU fits the existing mounting arrangement. Keep that response with the order in case the delivered item does not match.
When a seat cover is enough
A fitted cover can protect serviceable upholstery or tidy a lightly worn surface. It cannot restore collapsed foam, a softened core, broken mounting points or a failed latch. If the cushion shifts, sags severely or no longer supports the occupant properly, investigate the underlying damage before covering it.
Even covers require an exact configuration match. For example, Durafit’s original-style RTV900 solid-bench cover excludes the X-model seat and newer 40/60 bench. Its page uses differing year descriptions, making a seat-photo and configuration check more useful than relying on the title alone. A slip-on cover and a replacement cushion are different products, even when both appear in the same search results.
Protect the restraints and safety systems
Seat replacement must preserve the original restraint arrangement and proper occupant position. Do not relocate belt anchors, substitute improvised mounts, cover inaccessible buckles or remove restraints to make a replacement fit. Any seat switch, wiring or interlock fitted to the machine must remain correctly installed and functional; never bypass it.
Kubota’s RTV900 operator documentation includes seat-belt use and inspection of the belts and rollover protection. Obtain the manual for your machine through Kubota’s manual and service resources. Have a qualified technician inspect damaged supports, questionable anchorage or a seat that will not secure correctly, and follow the exact component instructions and specified fasteners.
If identification reveals an RTV-X rather than an original RTV900, check Kubota’s safety notices. Kubota has published an RTV-X seat-belt-stay recall covering specified vehicles. That is not a recall of every RTV900 seat; a dealer must check whether the particular machine is affected and whether the required repair has been completed. If the vehicle is affected and the repair is outstanding, stop using it and arrange the free repair with an authorized Kubota dealer.
Before you place the order
Confirm the exact SKU and color, whether the purchase is a cover, one cushion, two cushions or a complete assembly, and the current instructions. Include replacement hardware or structural repairs in the total quote, and check the seller’s return conditions before opening or installing the part. Keep the old components available for comparison until fitment is established.
For the listed original G9/R9/T9/W9/W9SEA machines, compare 8622, 8624 and 8621 according to what actually needs replacing. For an XT, X-series machine, unknown serial range or damaged seat structure, get Kubota’s exact parts identification first. That small amount of verification is more valuable than buying a supposedly universal seat that compromises mounting or belt access.
