Shyft Group is replacing fuel hoses on 373 Spartan RV Chassis K2 motorhome chassis built for model years 2024 through 2027. The recall report reached NHTSA on Oct. 15, 2026, and it describes a hose that can come off its fitting, leak diesel and stall the engine. Cummins, which supplied the engines, will make the replacements at no charge.
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The number is a count of vehicles that could have the part, not a count of failures. Federal recall records list every chassis built with the suspect hose as potentially affected, and the NHTSA record for the Spartan chassis does not mention any crash, fire or injury tied to the fault. What it does set out is a chain of events that owners of large diesel coaches have good reason to take seriously: a fuel line comes loose, fuel escapes, and the engine quits.
NHTSA’s record on the K2 chassis
NHTSA’s campaign record for recall 26V679 lists 373 potentially affected Spartan RV Chassis K2 units from Shyft Group, split across four model-year entries for 2024, 2025, 2026 and 2027. The component is the diesel fuel delivery system, specifically the hoses, lines and fittings. The record was filed under Shyft’s own recall number, 26-07, and carries Cummins recall number C7311 as well.
The defect statement is short. The remote fuel filter hoses can separate from their fitting, which causes a fuel leak and an engine stall. The record spells out the two consequences in plain terms: a leak near an ignition source raises the risk of fire, and a stall while moving raises the risk of a crash. Fuel and heat sit close together in a diesel engine bay, which is the reason a hose that merely lets go is filed as a safety defect and not a nuisance.
The record gives owners one practical detail beyond the fix itself. Letters are expected to be mailed on Nov. 20, 2026, and two phone lines are named, Cummins customer service at 1-800-286-6467 and Shyft customer service at 1-855-589-9836. The entry carries no park-outside or do-not-drive instruction for the Spartan chassis.
The Cummins L9 hose behind the chassis recall
The chassis recall is the downstream half of an engine campaign. Cummins filed equipment recall 26E066, which covers L9 diesel engines built with the remote Stage 2 fuel filter option. That option adds two pressurized hoses, one for supply and one for return, and those are the parts that can separate. Cummins traces the problem to insufficient crimping of the connector, which can leave the hose poorly retained on its fitting.
The engine report is blunt about what a loose hose does. A disconnected hose can stall the engine, and a leak near an ignition source can start a fire. It also tells drivers what to watch for: a fuel smell, a visible leak, or a malfunction indicator lamp with low fuel pressure fault code FC559. Cummins records a chronology that ran from June 1 to Sept. 4, 2026, during which engineers evaluated hose designs from three earlier recalls, numbered 23E055, 24E038 and 25E004. The company decided on Sept. 22 to replace the hoses on the affected population with a redesigned part and submitted its report on Sept. 28.
Production changed on April 11, 2026, when Cummins switched to a hose with an updated hose-to-fitting crimp. Engines built before that date are the ones now being corrected, and the engine report lists Nov. 20, 2026, as the planned owner-notification date, the same day the Spartan record gives.
Spartan is not the only vehicle maker caught in the same net. Temsa North America filed its own Part 573 report for 26V669, covering 2024 and 2025 TS35 coaches, and quotes the engine maker directly: “Cummins stated that the remote fuel filter hoses installed on the subject engines can become separated.” The report says Cummins gave Temsa the affected serial numbers on Oct. 7 and that Temsa decided to recall on Oct. 12. NHTSA’s public record for 26V669 repeats the leak, fire and stall consequences, and the same free hose replacement.
The remedy and the owner timeline
The fix is a straight hardware swap. Cummins will replace the fuel hoses with the redesigned versions, using three new part numbers, 6552994, 6553001 and 6553018, that appear in both the engine report and the Temsa report. Owners pay nothing. Cummins describes the engine campaign as a phased recall, so letters and parts reach different vehicle types at different times, and the Cummins recall number for owners to quote is C7311 while Shyft’s own is 26-07.
For the engine campaign itself, Cummins reports an estimated 3 percent of covered engines as likely to carry the defect. The Spartan record does not repeat that estimate for its 373 chassis, so owners should read the figure as a population-wide estimate and not as a prediction for any single coach. The practical advice follows from the records: any owner of a 2024 to 2027 K2 chassis who has not received a letter by late November can check a VIN on NHTSA’s recall lookup or call the Cummins recall line directly.
What the records leave open is pace. They put the first owner letters on Nov. 20, 2026, name no date by which every one of the 373 chassis will be repaired, and report no count of hoses that have actually failed on a Spartan coach.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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