Toyota is recalling 167,802 Sienna hybrid minivans because bolts on the backs of its third-row seats may not have been tightened properly at the factory.

The recall includes 2021-2025 Toyota Sienna models, representing the entire model-year range of the current-generation Sienna, which is available only as a hybrid.

The affected minivans are equipped with 60/40 split-folding third-row seats in which the seat backs are bolted to recliner plates on each side. The bolts holding the seat backs to these plates may not have been torqued to specification at a separate facility, according to the NHTSA documents.

If the seat bolts aren’t sufficiently tightened, the seats may not perform as designed in a crash, the NHTSA said, providing less occupant protection. Toyota estimates that less than 1% of the recalled vehicles actually have this issue, which the automaker said was discovered during an inspection at a production facility.

Toyota plans to notify owners of the recall by mail starting Mar. 31, instructing them to take their vehicles to dealerships, where the seat-back bolts will be tightened to the proper spec free of charge. In the meantime, owners can call Toyota’s customer service department at 800-331-4331 for more information. Toyota’s reference number for this recall is 25TA05.

2025 Toyota Sienna

The Sienna is EPA rated at 36 mpg combined in its standard front-wheel drive configuration, and 35 mpg combined with optional all-wheel drive. In a first drive, we found that this efficiency plus the Sienna’s newfound design flair helped make the minivan relevant again.

Nearly all of the few minivans still available in the U.S. offer hybrid powertrains. The Chrysler Pacifica Hybrid is a plug-in hybrid with 32 miles of EPA electric range. The Kia Carnival added a hybrid powertrain option for 2025, rated at 33 mpg combined, leaving the Honda Odyssey as the only non-hybrid minivan.