Hyundai Motor America has released a technical service bulletin to address a problem with loose lower battery covers on the Ioniq 5 and Ioniq 6 electric models from recent years. The issue affects certain 2022 to 2024 Ioniq 5 crossovers and 2023 to 2025 Ioniq 6 sedans.
What the Fix Involves
The service bulletin, labeled 26-EV-008H, targets a fiber-reinforced panel that protects the battery pack’s underside from debris. Some customers noticed this cover loosens near the center mounting bolts, especially at highway speeds.
Hyundai’s solution is to replace all center bolts on the panel. Short-range variants use four bolts, while long-range models require six. Each new bolt is paired with a special cup washer that has an adhesive side facing upward. This washer sticks to the panel and helps clamp it tightly to the battery tray.
Technicians must tighten these bolts to exactly 58 pound-feet (79 Newton-meters) and are instructed not to reuse any old bolts. After replacing the bolts and washers, they perform a road test to ensure the looseness and any related noise are gone.
Strict Warranty Rule for Repairs
An important part of the fix is Hyundai’s policy that if any part of the lower tray is loose, all center bolts must be replaced—not just the ones showing damage. The original bolts are to be returned through the warranty process, and dealers that don’t comply will lose out on the claim payment.
Cause of the Issue Remains Unclear
The bulletin does not explain why these battery covers loosen in the first place. It might be due to adhesive failure or a problem during initial assembly, but Hyundai has not confirmed any specific cause.
Additional Ioniq Updates
While the regular Ioniq 6 is no longer sold in the US, Hyundai still plans to release a high-performance N version in spring 2027. The Ioniq 6 N and Ioniq 5 N both feature 641 horsepower in N Grin Boost mode. However, the driving range of the Ioniq 6 N in the US is still unconfirmed. For comparison, the Ioniq 5 N offers about 221 miles (356 kilometers) EPA range, while the longest-range Ioniq 5 reaches 318 miles (512 kilometers).
Despite Hyundai’s overall strong US sales performance in October 2026, deliveries for the Ioniq 5 and Ioniq 6 have dropped notably this year. The Ioniq 5 fell 23% year-to-date, and the Ioniq 6 declined 86%. Meanwhile, the newer Ioniq 9 SUV showed improved sales for the first ten months of 2026.
Source: autoevolution.com