On September 16, 2019, the Office of Defects Investigation (ODI) granted Defect Petition DP18-004 and opened Preliminary Evaluation PE19-012 to investigate allegations of deficient frame welds and their potential safety related effects on 2018-2019 Jeep Wranglers. Due to a previous steering related recall that was caused by a misaligned weld on the front track bar (NHTSA Recall No. 18V-675), ODI decided to include reports of steering shimmy or wobble, loose steering, and steering stiction (loss of power steering) as part of this investigation and parent petition (DP18-004). ODI received information from the vehicle manufacturer Fiat Chrysler Automobiles (FCA) via information request letters dated March 8, 2019, and February 6, 2020. Supplemental requests for information occurred between July 2020 and July 2023. A review of the responsive manufacturer information showed that vehicles presenting an unexpected reduction in steering ability due to a welding tool misalignment were correctly addressed via recall 18V-675. General complaints concerning the weld appearance were not associated with a realized risk to motor vehicle safety. ODI identified a limited number of reports involving weld separation on vehicles that were out of scope of recall 18V-675. FCA identified various causes of weld quality issues in early production (build dates prior to March 2018) including improper welding techniques on galvanized frames and component part variation leading to off-seam welds. These issues were addressed in production for subject vehicles built after July 2018 and preceded a drop in weld failure reports. ODI reviewed manufacturer and agency reports of weld failures out of scope of recall 18V-675 and did not find any that resulted in a loss of vehicle control. There are no known crashes, injuries, or fatalities as a result of weld failures on vehicles not included in recall 18V-675. Due to the steering related consequence associated with Recall 18V-675, ODI opted to include a