| Subject: | Battery management software updates |
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| Investigations Summary: | On September 19, 2019, the office of defects investigation (odi) received a defect petition dated September 17, 2019, requesting that NHTSA initiate a defect investigation of certain tesla model s and model x vehicles that received revised battery management software in one or more over-the-air (ota) updates from tesla, beginning in may 2019. The petitioner alleges that the software updates were in response to a potential defect that could result in non-crash fires in the affected battery packs and that tesla should have notified NHTSA of the existence of this potential defect and conducted a safety recall. The petitioner also alleges that this software update reduces the driving range of the affected vehicles. A copy of the petition will be added to the public file for this defect petition and odi will evaluate the petitioner's allegations to determine if the petition should be granted or denied. The following voq numbers are associated with the issues discussed in this resume:11254112, 11246771, 11246770, 11243758. |
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