Which one of you won the lottery? Only 15 2019-2022 i3 BEV and Rex cars, plus 1 745e are being recalled for a defective battery.
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On May 25, 2022, a 2021 BMW 320e xDrive Touring experienced a thermal event in Finland. An engineering investigation was initiated.
Preliminary information suggested that the issue might be related to 20V-601, in which debris was able to
enter a battery cell during supplier production, but further information and analyses were necessary. In order
to accurately determine the root cause of the incident, access to the vehicle and the battery would be needed.
In June and July, BMW contacted the vehicle owner and the insurance company in an attempt to gain access to
the vehicle. However, it was not until mid-July that the vehicle was made available.
In mid-July, the vehicle analysis was able to commence in Finland. Initial analyses of the vehicle did not result
in an identification of the root cause, and therefore, analyses of the battery would also be necessary.
In mid-August, the battery was shipped to BMW for analysis. Analyses consisted of CT scans of battery cells,
and battery module and cell disassembly in conjunction with the battery supplier. Analyses of CT scan data
and disassembled components were performed.
In early September, it was finally determined that the root cause of the field incident was a damaged electrode
within a cell, which was further confirmed by reviews of supplier production records in which certain
electrodes may not have been properly sized during the laser cutting process.
On September 6, 2022, BMW decided to conduct a voluntary safety recall.
BMW continued to analyze the issue with the high-voltage battery supplier. It was determined that additional
battery cells may not have been produced to specifications. Parts tracing was performed to correlate battery
cells to battery modules, and battery modules to potentially affected vehicles.
On September 28, 2022, BMW decided to conduct a voluntary safety recall.
BMW has not received any reports, nor is BMW otherwise aware, of any accidents or injuries regarding this
issue.
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https://static.nhtsa.gov/odi/rcl/202...2V683-3950.PDF
