Investigations
Fire - Propulsion Battery - Road Debris
NHTSA Preliminary Evaluation PE13037 — closed, opened 2013-11-15 and involving the TESLA MODEL S.
NHTSA investigation PE13037 is a Preliminary Evaluation opened on 2013-11-15 and currently closed. The subject of record is TESLA MODEL S, which places this file inside the Office of Defects Investigation queue for TESLA. Latest activity on this investigation was logged on 2014-03-26 — NHTSA updates that field whenever an Information Request goes out, a supplement is filed, or a status change is recorded in the public docket.
A Preliminary Evaluation like PE13037 is the entry point of the federal defect-investigation process. NHTSA engineers scan complaint databases, field reports, and manufacturer data to decide whether an Engineering Analysis is warranted, whether a voluntary recall is already sufficient, or whether the pattern does not rise to a defect finding.
Investigators summarized the matter as follows: "The subject vehicles (SV), model years 2012-2013 Tesla Model S, are emerging technology electric vehicles using a high voltage battery (HVB) to provide propulsion energy. The HVB uses lithium-ion cells combined in 60 or..." Investigations are the early-warning layer of the federal auto-safety system, sitting upstream of formal recalls and defect orders. Whether this one closes without action or escalates into an Engineering Analysis, the full history stays in the ODI archive so researchers, litigators, and buyers can pull the paper trail at any time. Related TESLA files, listed below, give context on whether this is an isolated concern or part of a broader pattern across the brand.
Investigation Summary
The subject vehicles (SV), model years 2012-2013 Tesla Model S, are emerging technology electric vehicles using a high voltage battery (HVB) to provide propulsion energy. The HVB uses lithium-ion cells combined in 60 or 85 kWh capacities, and a control system that monitors the HVB and its liquid cooling system. The HVB is positioned across the width of the vehicle between the front and rear wheels and lies above a flat aluminum pan that forms the bottom of the SV's chassis. About two thirds of the SVs were manufactured with an air-assisted suspension system that actively controls ride height, including automatically lowering the vehicle at higher speeds. Two separate incidents in 2013 resulted in significant fires involving the SVs, one in Washington (Oct. 13) and one in Tennessee (Nov. 13). Both incidents involved active suspension equipped vehicles operating at highway speeds and reduced ride height running over debris in the roadway. In both incidents, the struck objects penetrated the aluminum pan at the forward area of the battery, damaging the lithium ion cells of the HVB. The SV's information display notified the driver of decreased battery performance and ultimately instructed the driver to stop the vehicle. The SVs were able to travel ~.8 and 1.8 miles after impact respectively. In both cases, smoke appeared shortly after the vehicle stopped and a fire developed in the HVB. Thermal runaway occurred in the HVB cells. The fires destroyed the vehicles but did not result in injuries. In the Tennessee incident, the object struck by the SV was determined to be a three-ball hitch that apparently fell from another vehicle. Tesla performed a series of tests reconstructing this incident and determined that a similar shaped object contacting the forward edge of the HVB could be "tripped" and potentially penetrate the HVB case. As the object's opposite end digs into the pavement, vehicle momentum causes the object to impart upward force into the case, described by Tesl
About This Investigation Type
A Preliminary Evaluation (PE) is the first phase of NHTSA's investigation process. It is opened when the agency identifies a potential safety defect pattern, usually triggered by consumer complaints, manufacturer reports, or field monitoring. During a PE, NHTSA gathers information to determine whether a formal engineering analysis is warranted.
Other TESLA Investigations
Emergency egress controls are not readily accessible and clearly identifiable.
Traffic safety violations while Full Self Driving ("FSD") is engaged
Electronic door handles become inoperative
Compliance with Standing General Order 2021-01 Reporting Requirements
FSD Collisions in Reduced Roadway Visibility Conditions
Data from NHTSA Office of Defects Investigation. Cross-references: NHTSA recall campaign API and NHTSA FARS where fatality records overlap. PlainCars does not rate or recommend vehicles. Learn more.
Read our methodology — how this data is sourced, computed, and verified.