Blue Bird Body Company has recalled 1,590 electric school buses because the bolts that hold the high-voltage battery in place may be loose or missing. The buses are Vision and All American Electric models from model years 2018 through 2024 and 2026. Owner and dealer notifications are due on or before December 1.
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A battery pack on an electric bus is among the heaviest single objects on the vehicle, and it rides on a handful of fasteners. When those fasteners let go, the failure is mechanical before it is electrical.
Bolts, nuts and a battery that can shift
The filing identifies the hardware: a 3/8-16 by 1.25-inch grade 8 hex flange bolt and a matching hex nut with a serrated washer, which hold an XALT high-voltage battery to the bus. The report treats the bolts as critical fasteners in the electric propulsion system, since the pack depends on them to stay seated. In its defect report to NHTSA, Blue Bird says a compromised mounting could cause a loss of propulsion or let the battery dislodge while the bus is moving. NHTSA’s consequence field for campaign 26V641000 is narrower: a battery with loose or missing bolts “can cause a loss of drive power, increasing the risk of a crash.”
The company puts the share of buses that actually have the defect at about 1 percent of the 1,590, so the campaign casts a wide net around a small number of expected failures: one percent of 1,590 is roughly 16 buses. The company chose to inspect every bus in the group because it cannot tell from a serial number which mountings were torqued too lightly, and a loose bolt is invisible without taking the battery fasteners apart. It also says the population is limited to buses carrying the XALT battery, built between July 11, 2018, and June 17, 2025. The battery is no longer in production, so no production fix was needed.
Nothing in the NHTSA filings points to a fire. The risk they describe is mechanical and operational: a bus that loses drive power on a road with students aboard, or a battery pack that shifts in its tray while the bus is moving. The campaign record carries no park-it or park-outside warning, so owners are not being told to stop using the buses before the repair.
From a broken bolt in 2023 to a dislodged pack in 2025
The history in the report runs longer than most recall chronologies. Blue Bird received a field report of broken battery mounting bolts in September 2023, and its analysis at the time produced a service-manual change that required bolt service at 12 months or 20,000 miles. Then, in December 2025, a field report described a battery pack that had dislodged from a vehicle, which started a new investigation and durability retesting of the mounting.
NHTSA entered the picture in June 2026, when the agency contacted the company about a vehicle owner questionnaire tied to the December incident. In September 2026, Blue Bird concluded that the torque specification for the mounting bolts was insufficient, and its Safety Committee designated the matter a safety recall. The defect report was submitted October 2. Across the whole period the company counts five field reports, between September 2023 and May 2026, and says it knows of no injuries or deaths.
A companion filing covers a different group. According to The EV Report, NHTSA received a second Blue Bird report the same day, campaign 26V642000, covering 16 All American Electric transit buses from model years 2022 through 2024. That campaign has its own number and its own count, and it is not part of the 1,590.
Thread locker, a new torque range and a six-month check
Under the remedy, a dealer or owner will remove and inspect the battery mounting bolts, replace any that are damaged or missing, and reinstall them using a new torque range and thread locker, a liquid compound that keeps threads from backing out under vibration. The work is free. Blue Bird will also update its service manuals to recommend bolt service every six months or 10,000 miles, tightening the original 12-month, 20,000-mile interval.
The new interval follows from the company’s own conclusion that the original torque specification was insufficient. For a district running a depot full of electric buses, the practical effect is that the battery mounting becomes a recurring line on the maintenance sheet rather than a one-time repair.
The remedy is to be available when the recall is released, the recall is phased, and costs are reimbursed under the company’s general plan on file. Owner letters are expected December 1, 2026, according to an acknowledgment letter dated October 8 signed by Alex Ansley, chief of NHTSA’s Recall Management Division. Blue Bird’s recall number is R26AK, and owners can call the company at 1-478-822-2242 or NHTSA’s Vehicle Safety Hotline at 1-888-327-4236. Fleet managers can also run a VIN through NHTSA’s recall lookup to see whether a specific bus is in the campaign.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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