Eighty percent is the number Volkswagen now wants ID.4 owners watching on the charge screen. The automaker filed a safety recall with the National Highway Traffic Safety Administration on Sept. 30, 2026, covering 22,524 ID.4 electric SUVs from the 2023 through 2026 model years, because the high-voltage battery may fail and lead to a vehicle fire. Volkswagen has not yet found the root cause, and the fix is still being developed.
Until a repair exists, the interim measure is a charging limit. For a vehicle built entirely around its battery pack, that is the remedy owners will live with for now.
The particulars are in Volkswagen Group of America’s Part 573 safety recall report to NHTSA, campaign 26V630, submitted Sept. 30. It covers ID.4 vehicles built from Jan. 1, 2023, through Feb. 1, 2025, and estimates that 0.1% of the 22,524 vehicles actually carry the defect. The affected high-voltage battery is listed under three part numbers and supplied by SK Battery America Inc., per the filing.
What the Part 573 report found, and what it hasn’t
The report is plain that the investigation is unfinished. “The root cause is unknown,” it says, but “certain charging profiles combined with a state of charge over 80% may trigger thermal propagation within the high-voltage battery.” Thermal propagation is overheating that spreads from one part of a battery to the next. The report states the safety risk in one sentence: “If thermal propagation occurs, it may result in a vehicle fire.”
Volkswagen’s chronology in the filing begins June 17, 2026. During an ongoing review of high-voltage battery thermal events in the field, preliminary data pointed to a possible influence from specific isolation-resistance values and DC-charging ratios. On Sept. 21, the review tied certain charging profiles and a charge above 80% to the risk of thermal propagation.
Two days later, on Sept. 23, the company made the call without waiting for an answer. “While the root cause of the events in the field is still unknown,” the report says, “the Volkswagen Product Safety Committee decided to conduct a voluntary safety recall for the affected U.S. vehicles.”
The filing counts “23 claims identified for USA from January 18, 2024 through August 07, 2026.” It does not say how many of those claims involved a fire.
The 80% interim measure
“Until the recall remedy has been performed, owners are advised to limit vehicle charging to 80%,” the Part 573 report says. Every affected owner is to receive a warning sticker for the vehicle “to remind operators not to charge the HV battery above 80% state of charge.” Depending on the vehicle’s configuration and online connectivity, the report adds, some ID.4s may be configured to cap the battery’s maximum state of charge at 80 percent.
NHTSA’s public recall summary for campaign 26V630000 carries the same advice: “Owners are advised to only charge their vehicles to a maximum of 80% battery capacity until the repair has been completed.” On the repair itself, the agency’s summary is one line: “The remedy is currently under development.”
Owner letters due Nov. 27
NHTSA acknowledged the campaign in a letter to Volkswagen dated Oct. 6, 2026, which lists Volkswagen’s own recall number as 93EX. Per that letter, “Interim letters, notifying owners of the safety risk, are expected to be mailed November 27, 2026,” and “Additional letters will be sent once the remedy is available.”
The ID.4’s earlier battery campaigns
This is not the first time the ID.4’s battery has drawn a recall. NHTSA’s database lists campaign 25V836, received Dec. 3, 2025, covering 629 2023-2024 ID.4s, and campaign 26V028, received Jan. 21, 2026, covering 670 more; NHTSA’s summaries for both describe battery cell modules that may have misaligned electrodes, which can cause a battery fire.
A third campaign, 26V030, also received Jan. 21, 2026, covered 43,881 2023-2025 ID.4s whose high-voltage battery may overheat, per NHTSA. That one came with a defined fix: dealers were to update the battery software and replace the battery where needed, at no charge, with owner letters mailed March 18, 2026. Electrive, in its Oct. 9, 2026 report on the new recall, put the two January U.S. campaigns at a combined 44,551 vehicles, which matches NHTSA’s two counts.
The difference this time is in the paperwork. The January campaigns named a defect and a repair. The Sept. 30 filing names a condition, a charging threshold and a sticker, and leaves the root cause open.
The next dated step is the Nov. 27, 2026 mailing of interim owner letters given in NHTSA’s acknowledgement, with a second round of letters to follow once Volkswagen has a remedy to offer.
Top image: A Volkswagen ID.4 GTX in Stuttgart, Germany. European model shown; the recall covers U.S. 2023–2026 ID.4s. Image Credit: Alexander Migl — CC BY-SA 4.0 / Wikimedia Commons