Volkswagen has launched a large-scale service campaign covering ID.4 models produced between 2023 and 2025. Affecting a total of 43.881 vehicles, the issue stems from a technical instability detected in the battery modules. The problem originates from an unplanned change made by a sub-supplier in the production process. This change has led to abnormal self-discharge of the battery cells and uncontrolled localized heating.
Software Deficiency and Fire Risk
Because the vehicles lack "Self-Discharge Detection" (SDD) software that can detect cell-based discharge early, it is nearly impossible for drivers to notice this dangerous situation beforehand. Volkswagen is issuing serious warnings that, in the worst-case scenario, this instability could lead to thermal runaway and fire.
Service Process and Free Replacement
Because this critical issue cannot be resolved via over-the-air (OTA) updates, vehicle owners need to visit authorized service centers in person. Technicians will install the necessary SDD software and then perform a comprehensive battery diagnostic. Modules found to be faulty will be replaced completely free of charge.
Sectoral Implications
This case, which manifested itself with symptoms such as a sudden drop in range or power reduction, proves just how fragile electric vehicle supply chains can be. For Volkswagen, this process represents a critical test in restoring customer confidence in its key model, the ID.4.
