NHTSA Preliminary Evaluation PE19011

The Office of Defects Investigation (ODI) opened this Preliminary Evaluation to investigate complaints alleging improper retraction of the front seat belts (driver or passenger) due to the plastic guide of the D-ring cracking in model year (MY) 2014 Jeep Grand Cherokee vehicles. The purpose of the investigation was to understand the scope, frequency and safety related consequence of the alleged defect. The subject condition occurs when the plastic material encapsulating the metal substructure of the front seat belt, B-pillar mounted D-ring cracks. The structural integrity of the D-ring remains intact; however, cracking of the plastic material pinches the webbing at the D-ring, thereby preventing it from properly retracting, and leaving the belt loose on the occupant. In addition to the detectability of the loose belt, the cracks in the plastic guide are also apparent by visual inspection, and many reports indicate the webbing can be manually fed back into the B-pillar/retractor to improve seat belt fit. ODI review of the available data has not identified any injuries attributable to this failure.In its November 6, 2019 response to ODI's September 8, 2019 information request letter, which was scoped to include MY 2013 to 2015 Grand Cherokee and Dodge Durango vehicles, FCA providedinformation (portions of which were submitted with a request for confidentiality) detailing several material and process changes involved in the production of the subject D-ring. Based on these changes, FCA sub-divided certain production periods into population groups representing different design levels of the D-ring. FCA's response also confirmed the same D-rings were used in Dodge Durango front seat belts. ODI notes that installation of seat belts during vehicle production involves highly controlled processes, in comparison to field service, which ensures all mechanical and electrical connections are properly secured.ODI analyzed complaints submitted directly to the agency and complaint d