Two Brands, One Factory, Same Battery Defect

In January, Volkswagen recalled 44,551 ID.4 electric vehicles because the battery cells might catch fire. In July, Hyundai and Kia recalled 14 EVs for the exact same reason. Different badges, different continents of assembly, same defect: misaligned electrodes inside lithium-ion battery cells manufactured by SK On.

Electrode misalignment sounds like a quality-control footnote until you understand what it actually does. Anode and cathode layers inside a lithium-ion cell must maintain precise separation. When they shift during manufacturing, those layers can make physical contact, forming an internal short circuit that generates localized heating and, eventually, thermal runaway. Battery-engineer shorthand for a self-sustaining chemical fire that burns above 2,000°F and can reignite hours after you think you've put it out.

NHTSA's Campaign 26V028 covers 670 ID.4s with what the agency calls an "elevated fire risk" from misaligned electrodes.^[1] The broader Campaign 26V030 sweeps in another 43,881 ID.4s from model years 2023 through 2025 for overheating battery modules supplied by SK Battery America, an SK On subsidiary.^[2] Seven months later, Hyundai filed its own recall covering six Ioniq 5s, seven Kia EV6s, and a single EV9, all traced to the same process failure at SK On's cell manufacturing line.^[3]

Both recalls came with identical advice: charge to no more than 80 percent, park outside and away from structures, avoid enclosed garages. NHTSA does not typically instruct Americans to treat their commuter vehicles like unexploded ordnance. When two separate automakers issue that advisory within six months over the same supplier's cells, you're not looking at two problems. You're looking at supply-chain monoculture.

SK On is not a small operation, and the reach of its supply chain makes this more than a VW or Hyundai problem. The company runs a battery plant in Commerce, Georgia, and a joint-venture factory in Glendale, Kentucky, through BlueOval SK, its partnership with Ford. SK On cells power the F-150 Lightning and E-Transit. No Ford EV battery recalls have materialized from electrode misalignment so far, but the Glendale line is a different facility with different process controls. That distinction is doing a lot of load-bearing work.

A fair counterargument: the system caught this, identifying the Hyundai/Kia defect at just 14 vehicles, a quality escape so small it barely registers as a rounding error. Compare that to Takata, which shipped tens of millions of defective airbag inflators over more than a decade while executives allegedly falsified test data. SK On's defect rate looks like a manufacturing system that works.

Except the VW recall isn't 14 vehicles; it's 44,551. The larger Campaign 26V030 suggests the process failure was not an isolated batch but a systemic issue spanning three model years of production. SK Battery America's Commerce plant supplied cells across a two-year manufacturing window. That's not a quality system catching a problem early. That's a quality system catching a problem after it shipped tens of thousands of packs.

The remedy is a battery software update and, where necessary, a complete pack replacement. A new battery pack for an ID.4 runs between $10,000 and $20,000 at dealer rates. Multiply by even a fraction of 44,551 vehicles and the warranty exposure dwarfs most traditional powertrain recalls, where the fix is a reflash or a $200 part. EV recalls do not scale like ICE recalls, and the economics punish everyone involved.

What this means for you: If you own a 2023-2025 VW ID.4, check your VIN at nhtsa.gov/recalls under Campaign 26V028 or 26V030. Hyundai/Kia owners with a 2022-2024 EV6, 2023-2024 Ioniq 5, or 2024 EV9 should do the same. Until the fix is confirmed, park outside and keep your state of charge at 80 percent or below. If something smells acrid while charging, unplug and walk away. Thermal runaway gives minimal warning and no second chances.

Sources & References

1. NHTSA, Recall Campaign 26V028, Volkswagen ID.4 battery cell electrode misalignment, Jan. 2026. nhtsa.gov
2. NHTSA, Recall Campaign 26V030, Volkswagen ID.4 high-voltage battery overheating, Jan. 2026. nhtsa.gov
3. NHTSA, Hyundai/Kia EV battery cell misalignment recall, Jul. 2026. nhtsa.gov
4. Autobody News, “VW, Volvo, Ford Issue High-Voltage Battery Fire Recalls on EVs and PHEVs,” Mar. 2026. autobodynews.com
5. Electrek, “Hyundai recalls a whopping 14 IONIQ 5 and Kia EVs,” Jul. 2026. electrek.co
6. NHTSA, Battery Safety Initiative. nhtsa.gov