A battery-management software fault has triggered the recall of roughly 142,000 electric vehicles, after the manufacturer determined that a diagnostic routine could fail to detect a specific pattern of cell degradation before it becomes a thermal risk.
No injuries have been attributed to the defect. The recall report filed with the safety regulator describes a small number of thermal events, all in vehicles that had been repeatedly fast-charged to a high state of charge and left at that level for extended periods.
What the fault is
Modern packs monitor each cell group for voltage and temperature and compare the readings against a model of expected behaviour. The fault lies in that comparison: under a narrow set of conditions the routine treated a genuinely anomalous reading as sensor noise and suppressed the warning it should have raised.
The remedy is a software update that changes both the detection thresholds and the vehicle’s response, adding a conservative charge limit when the routine sees a pattern it cannot classify. Most affected vehicles will receive the update over the air; a minority require a service visit because of an older communications module.
What owners should do
- Check whether your vehicle is affected using the VIN lookup on the national safety regulator’s website — it is authoritative and free.
- Install the update when offered. Over-the-air recalls are only complete once the vehicle confirms installation.
- Until the update is applied, follow the manufacturer’s interim guidance on charge limits, which is stated in the owner notification letter.
Why software recalls are counted differently
A recall is a legal classification, not a description of severity. Once a manufacturer determines that a defect presents an unreasonable risk to safety, it must notify the regulator and owners and provide a free remedy — whether that remedy is a new part or a firmware update delivered overnight.
The share of recalls resolved in software has risen sharply as vehicles have become more software-defined. That has made remedies faster and cheaper, and it has also made the headline recall count a poorer proxy for how serious the underlying problems are than it was a decade ago.
The number that matters in a software recall is not how many vehicles were recalled. It is how many have confirmed the update.
Newsroom analysis
Completion rates are published quarterly. For over-the-air remedies they tend to run well above the historical average for parts-based recalls, largely because the owner has to do nothing beyond leaving the vehicle connected.
Owner notification letters go out within the statutory window. The regulator’s public database carries the full defect report, the remedy description and the chronology of how the manufacturer arrived at its determination — all of it worth reading before drawing conclusions from a headline.
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