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What the 2026 Lineup Split Means for Your TXT-Platform Cart

Textron E-Z-GO (NYSE: TXT) split its 2026 model year in two. The premium RXV and Liberty series move to automotive-style bolstered seating with integrated armrests and optional heating elements. The TXT-heritage platform — Valor, ST, and ST Sport — keeps the legacy flat-panel rear seat architecture.

That split works in your favor. Valor and TXT-heritage models retain the classic bolt-pattern architecture, so the Black Golf Cart Rear Seat Cushion Set stays a direct-fit replacement across the whole family. It is a dual-cushion package: seat bottom at 37.4″ × 14.2″ × 3″, backrest at 35.4″ × 9.9″ × 3″, landing on OEM factory mounting points with no drilling or modification.

2026 Compliance Snapshot

• Zero electrical load: a passive seat assembly that never interfaces with the CAN-bus network — no contact with the E-Z-GO Gen-2 CAN-bus (500 kbps) or the MY2026 ECOXGEAR diagnostic gateway — on carts carrying the ECOXGEAR diagnostic touchscreen package.
• Vinyl: marine-grade UV-stabilized material compliant with SAE J2412 accelerated weathering protocols.
• Foam: high-resilience (HR) polyurethane core tested to ISO 3385 fatigue standards.
• Durability: less than 8% indentation stiffness loss after 80,000 compression cycles.
• Service life: 4–6 years under normal exposure (≤1,500 UV-hours/year per SAE J2412) — a 2026–2030 window.

Vinyl Shell: A 4-Layer Marine-Grade Build

The outer skin is a 4-layer calendered PVC composite, and each layer has one job:

1. Clear UV topcoat with benzotriazole UV absorbers.
2. Pigmented color layer with carbon-black dispersion for IR reflectivity.
3. Closed-cell PVC foam middle layer for tactile softness.
4. Polyester knit backing for dimensional stability.

This construction meets the horizontal burn-rate requirements of SAE J369 (≤4 in/min) and FMVSS 302 for interior materials. Color hold is where it pulls ahead of standard automotive vinyl: after 1,000 hours of xenon-arc exposure per SAE J2412 Cycle 1, ΔE color shift measures ≤3.0 — against an OEM threshold of ΔE ≤5.0, roughly 40% less shift.

Foam Core: High-Resilience Polyurethane by the Numbers

The 3-inch thick HR molded foam core runs a density of 2.8–3.2 lb/ft³ (45–51 kg/m³). Against the OEM's roughly 2.2 lb/ft³ foam, that is a 36% density improvement you feel on every ride.

Fatigue data comes from ISO 3385 Method A: 80,000 cycles at 70°C. Thickness loss stays under 6% and hardness loss under 10%, against the 15% maximum the standard allows for automotive-grade seating foams. Versus the OEM baseline of ≤12% thickness loss, that is 2× the fatigue endurance — consistent cushioning for rear passengers on a 2026 Valor 4 through the 2030 service horizon.

Spec Matrix: Koeep SKU 3400

The verified technical data for this set, condensed. Keep these figures on hand when you measure your old cushions or compare quotes.

Head-to-Head: OEM vs. Koeep

Here is how the aftermarket set stacks up against the 2026 OEM seat, parameter by parameter.

Fitment Map for 2026

Coverage spans MY2014–2026 — a 12-year cross-compatibility window — but two 2026 platforms stay off the list.

• Fits: E-Z-GO TXT (MY2014–2026), ST, ST Sport, Valor, and Valor 4. The 2026 Valor 4 uses the identical TXT-heritage rear seat frame architecture carried forward from MY2022–2026.
• Fits: rear flip-seat kits from NOMAD, MADJAX, GTW, and 10L0L — the aftermarket frames commonly installed on TXT-platform carts.
• Does not fit: RXV. Different frame architecture.
• Does not fit: Liberty 4F. Forward-facing rear seat design introduced MY2025.

OEM cross-reference: the set replaces the E-Z-GO OEM seat bottom assembly (Textron P/N ranges 607950–608021) and backrest assembly (P/N ranges 607951–608022) for MY2014–2026 TXT-platform vehicles, with the dimensional match verified against factory CAD specifications.

DTC Compatibility: Why a Seat Can't Throw a Code

The set is a passive mechanical component with zero electrical interface. It does not interact with the E-Z-GO Gen-2 CAN-bus (500 kbps) or the MY2026 ECOXGEAR diagnostic gateway, so cushion replacement triggers no P-codes, B-codes, or U-codes.

If your 2026 Valor beeps through EZGO PDS 36V fault codes — 1-1 controller failure, 1-2 throttle fault, 3-2 solenoid driver fail — those originate in the motor controller and are unrelated to seating components.

2026 Regulatory Outlook

NHTSA and SAE continue discussions on extending FMVSS seating standards to LSV (Low-Speed Vehicle) categories, including golf cars. The set's dual SAE J369 / FMVSS 302 certification puts it ahead of the anticipated 2027–2028 regulatory convergence for personal transport vehicles.

Installation: 15–20 Minutes, Hand Tools Only

The procedure is identical across all TXT-platform variants. ST Sport and standard Valor share the same rear seat frame substructure — the Textron 600-series seat frame family.

1. Remove the worn cushions from the 600-series frame.
2. Set the new seat bottom and backrest onto the pre-drilled bolt holes.
3. Fasten with the included M6×1.0 stainless steel fasteners.
4. Tighten with a 10mm socket and finish with a Phillips screwdriver.

Average install time runs 15–20 minutes. No drilling, trimming, or adapter brackets at any step.

Ride Comfort on the Valor's 2-Leaf Rear Suspension

The 2026 Valor retains the TXT-platform rear leaf-spring suspension — a semi-elliptical, 2-leaf design — which transmits more high-frequency road vibration to rear passengers than the RXV's independent rear suspension.

The extra half-inch of HR foam adds roughly 20% mechanical isolation in the 5–30 Hz range — the band where cart-path roughness lives. On a 2-leaf rear axle, that is the difference between finishing a ride sore and finishing it ready for another loop.

To be clear about scope: this is not a suspension upgrade. The 3-inch HR foam core, versus the OEM 2.5-inch, measurably reduces passenger fatigue on extended rides over aggressive cart-path textures — nothing more.

Pairing, Care & Ordering Notes

Rear cushions rarely wear alone. If your front bench shows the same UV crazing, pair the rear set with the Black Golf Cart Front Cushion Seat Cover for EZGO TXT and refresh both rows in one order.

Maintenance is light. Inspect every 24 months for UV surface integrity and foam rebound resilience. Run the thumb test: press firmly, and treat an indentation that persists longer than 3 seconds as your replacement cue.

Where to Go Next

The same rear cushion set is carried on two catalog entries — the SKU 3400 page above and this standard rear cushion set page — handy when you want to cross-check current pricing before ordering. For deeper fitment and care details, read the Complete Guide to the Black Golf Cart Rear Seat Cushion Set, or browse the Koeep interior parts collection for the full catalog.

Order the SKU 3400 Rear Cushion Set

Frequently Asked Questions: DTCs, Wear & 2026 Fitment