Volkswagen recalls 72,700 electric vehicles: The supply chain bill behind SK On cell defects
In October 2026, a Volkswagen ID.4 owner residing in Munich received an SMS from his dealer: The vehicle had been remotely upgraded, the charging limit was locked at 80%, and he was advised to park outdoors whenever possible.
He was told this was a preventive safety measure because the power battery cells contained manufacturing defects that could potentially cause fire in extreme cases.
This is not an isolated incident. According to filing information from the German Federal Motor Transport Authority (KBA), Volkswagen is recalling approximately 72,700 electric vehicles globally in three batches, involving ID.3, ID.4, ID.7, ID.Buzz, and the Spanish sub-brand Cupra Born produced between 2022 and 2025. Approximately 10,000 vehicles are affected within Germany alone.
Volkswagen disclosed that internal quality checks found some high-voltage battery cells did not meet quality requirements. In rare cases, this could lead to increased thermal load on the battery, posing a fire risk in severe instances, while the root cause of the defect has not yet been fully identified.
Reviewing the details, Gaogong Lithium Battery noted that Volkswagen’s European recall documents did not publicly name the cell supplier nor disclose the specific type of defect.
Linking this recall with previous SK On cell issues in the North American market is a reasonable inference based on the continuity of timelines, vehicle models, and battery pack specifications. However, whether the two recalls share the same cause remains subject to further disclosure by Volkswagen.
From North America to Europe: A Prolonged Recall Timeline
Looking at the extended timeline, Volkswagen USA had already recalled a total of 44,551 model year 2023-2025 ID.4 vehicles in two separate batches in January 2026.
According to public documents from the U.S. National Highway Traffic Safety Administration (NHTSA), the defect description for this batch was very specific: "misaligned electrodes" existed inside the high-voltage cell modules. Under certain charging conditions and when the state of charge (SOC) exceeded 80%, this could trigger internal micro-short circuits in the cells, potentially leading to thermal runaway and vehicle fire.
The recall document explicitly pointed to high-voltage cell modules supplied by SK Battery America (the Georgia factory subsidiary of SK On). NHTSA even directly advised owners to "Park Outside" in its notification.
At that time, Volkswagen’s response involved battery health checks, installing upgraded Self-Discharge Diagnostic (SDD) software, and directly replacing modules predicted to be at risk.
On September 30, NHTSA disclosed again that Volkswagen would recall 22,524 ID.4 vehicles in the US. By October, the scale of the global recall filed with KBA expanded to 72,700 vehicles. The interim measures were unified as follows: remotely limiting the charging cap to 80% via the infotainment system, installing SDD software, and inspecting/replacing battery modules at dealerships if necessary.
This combination of "software current limiting plus real-time diagnostics" is highly consistent with the approach taken during the January recall in North America. However, unlike the January recall, the European recall documents did not explicitly state that the defect was electrode misalignment, noting that the root cause was still under investigation.
Electrode Misalignment: Industrial Implications of a Process-Level Defect
Since the January North American recall explicitly pointed to electrode misalignment, the process mechanism of this defect warrants separate analysis.
"Electrode misalignment" is a typical process-level deviation in cell manufacturing. During winding or stacking processes, the alignment accuracy of the cathode sheet, anode sheet, and separator must be controlled within tight tolerances.
The industry-standard alignment tolerance requirement ranges from ±0.1 to 0.3 millimeters. Once the positional deviation exceeds the design window, the edge of the anode may lose complete coverage over the cathode, creating localized current density concentration under high SOC states. After long-term cycling, this can induce lithium dendrite growth, piercing the separator and causing internal short circuits.
It is important to clarify: Electrode misalignment is a precision issue faced by both stacking and winding processes, and there is no direct causal relationship with pouch or prismatic packaging formats.
Whether it is the pouch stacking used by SK On or the winding/stacking lines used by prismatic battery manufacturers, loss of control over alignment accuracy can lead to similar defects. One cannot deduce that the pouch route has systemic shortcomings simply because this issue occurred in SK On's pouch products.
A noteworthy detail is the 80% SOC threshold. This implies that the problematic cells already had latent micro-short circuit channels, but observable self-discharge signals had not yet been triggered in the low SOC range.
Volkswagen’s use of BMS software to limit charging to 80% as an interim measure essentially hands over risks not fully intercepted during the manufacturing stage to real-time diagnostic algorithms on the vehicle. The underlying judgment is that the proportion of problematic cells is significant, and they cannot be completely screened out through after-sales inspection in the short term.
Who Pays for the 72,700-Vehicle Recall: Volkswagen's Battery Bill
More concerning to the industrial chain than the technical root cause is the bill behind this recall.
For 72,700 vehicles, using the MEB platform battery pack usable capacity of 60 to 82 kWh and an estimated cell unit price of $80 to $100/kWh, the raw material cost for cells alone falls in the range of $350 million to $600 million. Adding labor for replacement, logistics scheduling, user compensation, brand depreciation, and operating costs for the dealer service network, industry insiders estimate to Gaogong Lithium Battery that the overall recall cost magnitude could land between €500 million and €800 million.
Who pays this amount? This is currently the most sensitive commercial issue between Volkswagen and its cell suppliers.
Under standard contract frameworks between Western automakers and battery suppliers, the quality responsibility of cell factories is defined by PPM penalties, quality assurance deposits, and recall cost-sharing clauses.
Industry practice for recalls caused by manufacturing defects is that cell factories bear direct material and replacement labor costs, while automakers bear indirect costs; the specific sharing ratio depends on the ceiling of the "quality escape" clause in the contract.
The key point is that this is not a single event. From2025 to present, Volkswagen has initiated multiple rounds of recalls in North America regarding cell issues from the same supplier.
Consecutive recalls imply two things: First, early delivered batches may not have been truly rectified; second, the quality stability of relevant overseas factories requires continuous observation.
For a battery company still in a loss-making state in 2025-2026, contingent liabilities brought by consecutive recalls will further squeeze its already tight cash flow.
Volkswagen’s global battery supply chain layout is worth reviewing. In the Chinese market, CATL has been supplying ternary cells for the MEB platform since 2018, with cumulative deliveries exceeding 200 GWh, covering multiple brands under Volkswagen;
Volkswagen Anhui’s localized models feature Gotion High-Tech batteries; SAIC Volkswagen’s ID.ERA series introduced Zenergy as a supplier; CALB has secured a nomination from Volkswagen, expected to supply FAW-Volkswagen, SAIC Volkswagen, and Volkswagen Anhui starting in 2027.
The European MEB platform is jointly supplied by SK On’s Hungarian factory, Samsung SDI, and CATL’s Thuringia factory in Germany; the North American ID.4 is supplied by SK On’s Georgia factory. The models involved in this recall have battery packs sourced from SK On’s production lines in Europe and the Americas, rather than the supply chain serving the Chinese market.
Ramp-Up Risks of Overseas Factories: New Line Quality Control is a Common Challenge
Broadening the perspective, this recall is primarily an issue of the cell supplier’s own process and quality control. However, it also highlights a structural risk in the power battery industry’s overseas expansion phase—quality control during the initial ramp-up of new lines.
Over the past five years, global power battery capacity expansion has extended to Europe and North America. But this expansion curve is far more prolonged than outsiders might imagine.
Currently, only a few have achieved mass cell production: CATL’s Thuringia factory in Germany started production at the end of 2022; SK On’s Georgia Plants 1 and 2 in the US, Komárom Plants 1 and 2 and Iváncsa Plant 3 in Hungary began commercial operation successively between 2022 and 2024; LG Energy Solution’s Warren factory in Ohio ramped up in 2023.
Gotion High-Tech’s Göttingen factory rolled out PACK products in September 2023, but cell production lines are still under construction; Samsung SDI’s Kokomo factory in Indiana only started small-batch ESS cell production in 2025. CATL’s Debrecen factory in Hungary only started trial production in September 2026; EVE Energy’s Hungarian factory is expected to go into production in2027; Sunwoda’s Nyíregyháza factory just broke ground in October 2026.
Industry consensus is that a brand-new cell production line typically requires a 2 to 3-year ramp-up period to reach yield stability. In the home country of the parent factory, this cycle can be compressed through skilled workers, mature supply chain support, and proximity-based equipment vendor responses; but overseas, these three conditions must be re-established.
European factories face gaps in industrial workforce and insufficient supply chain density, while North American factories additionally deal with compliance requirements, union relations, and experience gaps in newly formed teams.
However, performance differences among companies during the ramp-up period are significant and cannot be simply analogized. An industry insider familiar with the European battery supply chain stated that yield fluctuations in the first year of overseas new line production are common, but whether these fluctuations eventually evolve into thermal runaway recalls depends on the depth of the parent factory’s process accumulation and its ability to control quality escapes.
To date, no cases of large-scale recalls or fires triggered by cell issues in EVs equipped by top Chinese battery companies overseas have appeared in public channels.
Currently, the industry has not formed a mature cost-sharing mechanism for this hidden quality cost. Automakers demand localized supply, battery factories bear capital expenditure and ramp-up losses, and quality risks during the ramp-up period are passively shared by both parties in after-sales recalls.
This Volkswagen incident may prompt Western automakers to reassess the trigger conditions for quality penalties and the division of responsibilities during the ramp-up period in next-generation long-term contracts.
After the Recall: The Reality Check Facing SK On
For SK On, the impact of this recall extends beyond direct costs.
Public information shows that over the past two years, SK On has faced multiple pressures on the customer side: Capacity plans for the BlueOval joint venture with Ford have contracted, and customers like Hyundai and Kia have introduced other suppliers to divert shares. Following this global recall by Volkswagen, whether SK On can provide root cause analysis and corrective actions convincing to customers in subsequent quality rectifications is key to determining the trajectory of its customer structure.
As for how much this recall will change the battery supplier landscape for Volkswagen and other Western automakers, it is premature to draw conclusions.
On one hand, IRA-related provisions in the US and EU industrial policies objectively restrict the market share of Chinese battery companies in Europe and the Americas; on the other hand, Western automakers are advancing multi-supplier strategies due to supply chain security considerations.
Volkswagen just announced in September 2026 a joint venture with Gotion High-Tech to build LFP battery factories in Valencia, Spain; Šurany, Slovakia; and Kenitra, Morocco. This indicates that its European battery layout does not exclude Chinese companies. How supplier shares will change subsequently requires observing nomination and order data over the next 12 to 24 months.
Volkswagen’s recall of 72,700 vehicles is not the end point. To date, SK On has not officially disclosed the root cause of the defect, nor has Volkswagen specified the final percentage of battery modules requiring replacement.
Quality control during the ramp-up period of overseas new lines is a challenge facing the entire industry. For the Chinese battery supply chain, the mirror effect of this event lies not in "we will also step into pitfalls"—at least, public channels report no similar-scale safety accidents involving vehicles equipped by Chinese battery factories overseas, and the process control capabilities accumulated by top Chinese enterprises at the parent factory stage are a structural advantage.
What truly needs vigilance is that quality risks in overseas factory construction are structural. If similar problems arise, the blow to newly established brand trust will be far greater than in the domestic market.
How to truly replicate the process consistency of the parent factory across the ocean, rather than merely copying factories and equipment, is an answer that CATL, Gotion, EVE Energy, and Sunwoda must provide.