Rear seat-belt retractors — recall 21V-649moderate
The 2021 also carries 21V-649, the 2016–2021 campaign for rear seat-belt retractors that may be improperly secured with loose or missing fasteners and could fail to restrain an occupant in a crash. Dealers inspect and tighten free. Between this and the seat-frame recall, the 2021's safety items are both seat-related and both easy to overlook — confirm both are closed.
Sources: NHTSA complaint database, 2021 Malibu · NHTSA manufacturer communications (recalls 22V-359, 21V-649 documents)
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Under recall 21V-649