A tire sealant bottle can blow its cap off inside 4,804 Honda hybrids already fixed once

Honda has told federal regulators that the tire repair kit in 4,804 of its hybrids can spit its own cap across the cabin: pressure can build inside the sealant bottle, and the cap can detach. The vehicles are the Accord Hybrid, the CR-V Hybrid and the CR-V Fuel Cell EV. The campaign, 26V663000, reaches back to a repair that was supposed to have solved the problem already.

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Honda’s wording about what a loose cap can do is blunt. A detached bottle cap, the filing says, “can become a projectile and strike the user or others nearby.” The people at risk are whoever is handling the kit after a flat and whoever is standing close by, which is why the filing names both the user and bystanders rather than the car’s occupants in general.

Sealant under pressure in the Accord Hybrid and CR-V

American Honda reported the defect in NHTSA campaign 26V663000, which puts the number of potentially affected vehicles at 4,804. The model list in the record is the 2023 through 2026 Accord Hybrid, the 2024 through 2026 CR-V Hybrid and the 2025 CR-V Fuel Cell EV. NHTSA classifies the component under tires, temporary and emergency spare tire, which is where a repair kit that stands in for a spare tire is filed. The report reached the agency on Oct. 8, 2026.

The mechanism is simple enough to picture. A sealant bottle is a sealed container of liquid and propellant, and Honda’s summary says that “pressure may build within the sealant bottle, causing the bottle cap to detach.” The record does not say what raises the pressure, how many caps have come off in service, or whether anyone has been hit. It names only the hazard and a change to the kit’s nozzle.

Why 26V366 is the context for this repair

These vehicles have been here before. In April 2026 Honda filed campaign 26V366, and its record lists the same three models, 2023 through 2026 Accord Hybrid and CR-V Hybrid plus the 2025 and 2026 CR-V Fuel Cell EV, with a potential population of 1,048,613 vehicles. The reason was the same: pressure inside the sealant bottle could pop the cap off. That campaign began with interim owner letters mailed on July 27, 2026, with a final remedy promised for fall 2026.

The new campaign is far smaller than the first, at 4,804 against more than a million, and its stated target is narrower. The record’s remedy note says “vehicles previously repaired under 26V366 will need the new remedy completed.” In plain terms, a car that went to the dealer after the first letter and came away with a replaced nozzle or sealant bottle may still be carrying a kit that Honda now wants looked at again.

The record leaves one question open that matters to those owners. It does not state why the first remedy was insufficient for this group, whether the 4,804 are all vehicles that received the earlier repair, or how a dealer will tell which nozzle a given car now carries. Honda’s inspection step suggests the answer will be settled at the service counter, car by car, rather than by a blanket parts swap. For an owner holding the July interim letter, the new notice is a separate action with its own number and its own mailing date, and one does not substitute for the other.

The inspection, the nozzle and the November letters

The fix described on the NHTSA page for 26V663000 is conditional. Dealers will inspect the tire repair kit and replace the nozzle “as necessary,” at no charge. Owners may contact Honda customer service at 1-866-784-1870 and should quote Honda’s own number for this action, PPW; the earlier campaign carried the number DOV. Owner letters are expected to be mailed on Nov. 16, 2026. Honda’s record adds that a search of the vehicle identification number on NHTSA.gov was expected to be available from Oct. 17, 2026.

Two further public records repeat the campaign. The listing of reports received from Oct. 8 to Oct. 15 carries the same campaign, and the full-length campaign record repeats the count and the prior-recall note, with the 2024 Accord Hybrid appearing on two separate lines because the record divides some model years into multiple entries.

The record flags no park-it or park-outside warning and no over-the-air update, so the vehicles stay in ordinary use while owners wait for the letter. The hazard attaches to the kit, not to driving: it arrives when someone opens the bottle after a flat tire. The record gives no instruction on whether to avoid the sealant until the dealer visit, and that is a question owners can put directly to Honda customer service. The same cap-and-pressure fault ran through both campaigns, which is what makes the overlap worth checking before an owner relies on the kit.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

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