News

Rear flip seats take the worst of a working E-Z-GO. Sun embrittles the vinyl, passenger loads crush the foam, and by year three or four you get cracks, sag, and a cushion that stays wet after rain. The Black Golf Cart Rear Seat Cushion Set for EZGO TxT, ST, ST Sport, and Valor models is a direct-fit replacement built for exactly that failure point.

The sections below cover material specs, bolt-pattern measurements, the four triggers that say a cushion is done, install torque, and the controller codes tied to rear-seat loading. Every number comes from the published spec for Koeep SKU 5044.

See the 2-piece cushion set

Fitment: TxT Heritage Through the 2026 Valor

E-Z-GO has iterated the TXT-heritage chassis since mid-1994, and the current Valor PTV and ST Sport variants still run on it. One cushion set covers the whole span:

• EZGO TxT, 1994.5 through current production
• ST and ST Sport utility variants
• Valor, all model years up to 2026, including Valor 2 and Valor 4

The set ships as two pieces, one rear bottom cushion and one rear back cushion, with pre-drilled multi-pattern backing plates. Standard seat kit bolt patterns need no drilling.

Koeep carries this set under more than one storefront entry. If the primary SKU 5044 page is out of stock, the alternate listing and the second listing hold the identical set, so you can order from whichever has stock.

Outer Shell: Marine-Grade Expanded Vinyl

Automotive interior vinyl is formulated for enclosed cabins behind UV-filtered glass. This shell is marine-grade expanded vinyl with UV inhibitors blended into the polymer during calendering. Against the CFFA coated-fabric benchmarks it meets or exceeds:

• CFFA-1a abrasion: minimum 25,000 cycles against #10 Duck
• CFFA-2 accelerated light aging: no appreciable color change
• CFFA-3 adhesion: minimum 3.0 lbs
• CFFA-4 blocking and CFFA-6a cold crack: pass
• CFFA-120 mildew protocol: zero growth

The number that matters outdoors is UV life: 1,000+ hours of direct exposure before measurable color shift, aligned with SAE J2412 (2024 revision). That revision allows window-glass-filtered xenon-arc output, a closer match to sunlight through a canopy. In ASTM G155 Zone 4 and Zone 5 sun regions, that works out to roughly 4 to 5 outdoor seasons.

1,000+ hours of UV exposure before measurable color shift. Budget-tier PVC starts crazing within 12 to 18 months in the same Zone 4/5 sun.

Foam Core: High-Density Closed-Cell PE

Open-cell polyurethane acts like a sponge in humid climates, which is why outdoor seating has moved to closed-cell cross-linked PE. This set uses closed-cell high-density PE foam at 2.0+ lbs/ft³, about 32 to 36 kg/m³, with a colorfast Deep Black shell in the #000000 range.

Density sets the lifespan. Foams below 1.5 lbs/ft³ lose more than 15% of their thickness within 18 to 24 months of daily use. The 2.0+ range, the same spec used for commercial-grade marine upholstery, projects a 2026 to 2030 service life.

One Backing Plate, Three Bolt Patterns

OEM E-Z-GO rear seat kits, GTW MACH3, MadJax Genesis 150/250/300, and Nivel kits each use slightly different mounting hole geometry. Koeep molds one backing plate with pre-drilled holes for the three most common bolt-circle patterns, which turns three SKUs into one and cuts parts-counter mix-ups.

Measure your old cushions before ordering. Common bolt-center dimensions run 8.5" to 9.0" horizontal on the seat back and 9.5" to 10.5" on the bottom cushion. Inside those ranges, this set bolts straight on.

Spec Matrix: Koeep vs OEM vs Budget Tier

Four Checks That Say Replace Now

Fleet maintenance works better with objective triggers than with eyeballing. Pull the cushions when any of these show up:

1. Vinyl cracking over 1.5 inches. A linear fissure past that length, especially along stitch lines or the edge radius, means the UV stabilizer package is spent and degradation accelerates from there.
2. Compression set above 15%. If the foam fails to recover to within 85% of original thickness within 60 seconds of unloading, the closed cells have started to collapse. Most common failure on pre-2020 carts.
3. Moisture wicking to the surface. Press firmly on the vinyl; surface water means a waterlogged core, which invites mildew (a CFFA-120 failure) and breaks down the vinyl-to-foam bond.
4. Bolt holes elongated past 0.5 mm. Stretched mounting holes let the cushion shift under passenger load and wear the plate and frame faster.

Skip reupholstering badly degraded OEM cushions. Compromised foam telegraphs irregularities through any new cover, and the labor cost runs past a complete 2-piece replacement set.

Installation: DIY Level 1

Tools: a 10mm socket or wrench, a 13mm socket for certain seat frame bolts, and a #3 Phillips screwdriver.

1. Remove the old bottom cushion via the four bolts beneath the seat frame platform. Keep the hardware if it is not corroded; it is reusable.
2. Unfasten the seat-back bracket bolts to free the old back cushion, 4 to 6 bolts depending on the seat kit maker.
3. Align the new back cushion on the support brackets and hand-start every bolt before final tightening.
4. Position the bottom cushion on the frame platform, line up the existing holes, and hand-tighten.
5. Torque 18 to 22 ft-lbs on 10mm bolts and 28 to 32 ft-lbs on 13mm bolts. Stay under 35 ft-lbs; the PE backing plate deforms above that.
6. Check that both cushions sit flush, with no rocking and no gap over 2 mm at any contact point.

Rear Seat Load and Controller Codes

Seats carry no sensors, and E-Z-GO's 48V AC drive controllers (RXV, Valor, late-model TXT 48V) generate no seat-specific trouble codes. Heavy rear loading still shows up in the code history:

• Undervoltage Cutback (Code 23): extra passengers raise rolling resistance and power draw. Normal battery readings plus this code points at total vehicle loading.
• Controller Overtemp Cutback (Code 22): sustained high-load running, four adults on extended grades, can trip thermal cutback at the 85°C heatsink threshold.
• Motor Stall (Code 14): steep inclines with a full rear seat can register a stall. Reduce rear load or run a higher-torque motor map through Curtis or Navitas programming tools.

Fleet telematics (E-Z-GO Fleet IQ or third-party CAN-bus loggers) can track average current draw per trip to spot carts run at or above rated passenger weight. On 2026 CAN-bus 3.0 carts, also watch undervoltage codes 17 to 23 on Curtis/RXV controllers, thermal cutback Code 22 on AC-drive systems, and communication faults P0600 to P0699. None of these mean a seat fault; they flag load conditions that wear the rear bench, so use them to schedule hardware inspections.

OEM Cross-Reference and Cost Math

Koeep catalogs the set under SKU 5044, cross-referenced to the E-Z-GO OEM part family 10033528 (the 4-Passenger RFS Pro Seatbelt Kit cushion assembly), the GTW MACH3 replacement cushion series, and MadJax Genesis 150/250/300 cushion sets. E-Z-GO's 2027 model-year announcements keep the Valor on the TXT-heritage platform, so the projected compatibility window runs 2026 to 2030.

Why Marine-Grade Pays Over Five Years

Budget cushions cost 30 to 40% less and show vinyl crazing within 12 to 18 months in Zone 4/5 sun. Automotive-grade vinyl shifts color at 400 to 500 xenon-arc hours; marine-grade clears the 1,000-hour threshold. For a fleet running 50+ carts, that is one replacement cycle instead of two or three across a five-year window.

If the order covers more of the cabin, browse the Koeep interior parts collection. For the tire side of the maintenance budget, see our ranking of 2024's best-selling tires by performance and safety.

Frequently Asked Questions