PE26006 · PE
SUSPENSION:FRONT:CONTROL ARM:LOWER ARM Investigation
The Office of Defects Investigation (ODI) has received 156 complaints alleging a suspension failure in model year (MY) 2018-2020 Model 3 and MY 2021-2023 Model Y vehicles. The suspension failure involves the detachment of the front lower lateral link, which potentially causes a loss of vehicle directional control. In most cases, there was no advance warning or indication that the suspension failure would occur.  Some cases cite noises occurring prior to failure, but note that the vehicle provides no visual warnings. Once the failure occurs, the vehicle may not be drivable, thus requiring a tow. Tesla has previously recalled vehicles for lateral link detachments through two recalls. Recall 21V-835 addressed 2,791 MY2019-2021 Tesla Model 3 vehicles due to a production issue. Recall 23V-235 addressed 422 2018-2019 Tesla Model 3 vehicles that had experienced similar failures to those recalled under 21V-835. The subject failures for this investigation exceed the scope of these recalls and do not appear to be related to the production issue that prompted those recalls. ODI is opening this Preliminary Evaluation to determine the underlying cause, scope, and severity of the potential problem and to fully assess the potential safety-related issues. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.
EA24001 · EA
STEERING Investigation
On July 28, 2023, the Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE23014) to investigate instances of loss of electronic power-assisted steering in MY 2023 Tesla Model 3 and MY 2023 Tesla Model Y vehicles manufactured by Tesla, Inc. The complaints allege a sudden and unexpected inability to turn the steering wheel or an increase in effort required to turn the steering wheel. These conditions were alleged to occur both during the drive cycle, at various speeds, and at vehicle start up. Consumers reported receiving the warning message âSteering assist reducedâ either before, during, or after the loss of steering control, and some consumers described their steering begin to feel ânotchyâ or âclickyâ either prior to or just after the incident. On February 1, 2024, PE23014 was upgraded to EA24001 to further investigate the alleged defect in the affected vehicles. Tesla identified the cause of the increase in steering effort as an overvoltage breakdown (the voltage applied exceeds the maximum design limit), which can overstress motor drive components on the printed circuit board of the vehicleâs steering Electronic Control Unit (ECU). If the primary motor drive components experienced an overvoltage breakdown occurrence while the vehicle was traveling above 0 mph, electronic power-assisted steering would be diverted to secondary motor drive components. The secondary, or backup, motor drive components would maintain electronic power-assisted steering until the vehicle reached 0 mph. If the vehicle was operating on the secondary system and reached 0 mph, the driver would lose electronic power-assisted steering with manual steering remaining available. Only manual steering would remain until the vehicleâs steering ECU is replaced. On February 19, 2025, Tesla filed safety recall 25V092 to address the loss of electronic power-assisted steering. The recall filing documents state that a steering ECU software update, identified as 2023.38.4, was introduced into production vehicles and provided to affected fleet vehicles through an over-the-air (OTA) update beginning in October 2023. The updated software was designed to prevent overvoltage breakdown and overstress of motor drive components on the printed circuit board. ODIâs analysis of related Vehicle Owner Questionnaires (VOQs) and Tesla field data found that complaint traffic declined following the 2023.38.4 software release. In view of the recall action taken by Tesla, ODI is closing this EA. ODI will continue to monitor the effectiveness of the remedy as is consistent with the Agencyâs authority and practice. NHTSA reserves the right to take additional action if warranted by future circumstances. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.
PE23014 · PE
STEERING Investigation
On July 28, 2023, The Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE23-014) after receiving 12 Vehicle Owner Questionnaires (VOQs) reporting loss of steering control in model years (MY) 2023 Tesla Model 3 and Y vehicles. During PE23-014, ODI interviewed complainants, sent an Information Request (IR) letter to Tesla, and convened technical meetings with Tesla that included a joint inspection of a crashed vehicle. The investigation identified 2,388 total complaints regarding the alleged defect, including 124 complaints through VOQs and 2,264 complaints through manufacturer data. ODI is associating 1 crash to this investigation (11544655), where a driver was unable to complete a right hand turn in the intersection and hit a vehicle. This vehicle was subject to a joint inspection by ODI and Tesla. The steering rack was recovered by ODI with the consumerâs permission. ODIâs interviews of allegations supplied to the agency, in the form of VOQs, identified patterns of the incoming complaint traffic. Complaints allege an inability to turn the steering wheel, while other complaints allege an increase in required effort to turn the steering wheel.  These conditions were reported to occur during the drive cycle as well as at start-up. Approximately one-third of complaints with a reported speed occurred at vehicle start-up or speeds less than 5 mph. Interviews with failures reported at speeds over 5 mph, half reported an inability to turn the steering wheel. A majority of complaints with a reported speed reported between 5 mph and 35 mph with approximately 1 in 10 occurring on open roads at speeds 35 mph and over. The highest reported speed regarding an alleged inability to turn the steering wheel is 75 mph. A majority of allegations reported seeing a warning message, âSteering assist reducedâ, either before, during or after the loss of steering control. A portion of drivers described their steering begin to feel ânotchyâ or âclickyâ either prior to or just after the incident. There have been multiple allegations of drivers blocking intersections and/or roadways. ODI is aware of over 50 vehicles which were allegedly towed as a result of the condition from a variety of areas including, driveways, parking lots, side of road and intersections. Multiple complaints state they were able to temporarily remedy the condition by power cycling the vehicle, but the issue reoccurred until the steering rack was replaced. Tesla supplied four steering rack part numbers on the subject vehicles.  The investigation identified part numbers, 1044832-00-A and 1188832-00-A accounted for 2,187 of the complaints and 4 did not have original part number in the information request. ODI has upgraded PE23-014 to an Engineering Analysis (EA24-001) due to continued complaint traffic and to characterize the system conditions leading to- and stemming from- the alleged defect in vehicles supplied with steering rack part numbers 1044832-00-A and 1188832-00-A To review the ODI reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.