Hyundai Replaces Ioniq Battery Cover Bolts
Hyundai Motor America's service bulletin 26-EV-008H covers loose lower battery covers on certain 2022-2025 Ioniq 5 and Ioniq 6 electric vehicles.
Updated on Nov. 6, 2026 in Electric Vehicles
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Hyundai Motor America has published technical service bulletin 26-EV-008H addressing loose lower battery covers on certain Ioniq 5 and Ioniq 6 electric vehicles. Dealers must replace every center bolt, tightening each to 58 pound-feet, with original bolts returned through the warranty parts process.
Why it matters
Owners of affected 2022 through 2025 model year Ioniq vehicles may need a dealer repair to eliminate a vibration sound caused by the loose underbody covers. The NHTSA filing does not state the cause of the problem.
Center battery cover bolts must be tightened to 58 pound-feet (79 Newton-meters), with 4 bolts on short-range and 6 on long-range vehicles. Ioniq 5 deliveries are down 23 percent and Ioniq 6 deliveries down 86 percent year to date.
The players
Hyundai Motor America
The U.S. arm of South Korean automaker Hyundai Motor Company, responsible for sales, distribution, and warranty service of Hyundai vehicles in the United States.
The details
Certain underbody covers work loose at the center mounting bolts and separate around the fastener holes. Technicians must replace every center bolt one at a time, and if any part of the lower tray has come loose, every bolt must be replaced; reused bolts are not allowed.
Timeline
October 2026: Hyundai reports its best October sales yet in the United States.
November 6, 2026: Service bulletin 26-EV-008H is issued.
Spring 2027: Ioniq 6 N scheduled to reach U.S. dealer lots.
Roadmap
The service bulletin lands as Hyundai's Ioniq 5 and Ioniq 6 deliveries fall sharply year to date, even as the brand posts its best October sales yet in the United States. The Ioniq 6 N's planned spring 2027 arrival signals continued investment in the high-performance end of Hyundai's electric lineup.
Owners of affected 2022-2025 Ioniq 5 and Ioniq 6 vehicles should check with a Hyundai dealer about the bulletin, since every center battery cover bolt must be replaced. The repair also requires the bolts to be returned through the warranty parts process.
The takeaway
Owners of affected Ioniq models who hear a vibration sound from underneath the vehicle should schedule a dealer inspection rather than wait for the problem to worsen. Hyundai's bulletin makes clear that partial fixes are not enough.
Further reading
Explore more coverage in the Electric Vehicles section for context on the segment's ongoing shifts.
Source note: This article includes information reported by Autoevolution.
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