Date: 2015-09-28
Isuzu
Motors Limited
NHTSA Action Number: PE15032
Components: SUSPENSION:FRONT:HUB
Subject:
Wheel bearing failure
Opened From: 2015-09-28 - 2016-02-25
Summary
The Office of Defects Investigations (ODI) opened this Preliminary Evaluation (PE) investigation on September 28th 2015 to investigate field reports submitted by Isuzu during quarterly Early Warning Reporting (EWR) describing wheel bearing failure(s) on model year (MY) 2012-2015 N-Series trucks.In addition an ODI investigator interviewed Isuzu automotive technicians to better understand the impact of this alleged failure mechanism.Isuzu technicians indicated subject Isuzu trucks had been brought in with bearings showing signs of excessive heat. On December 18th 2015 ODI received a response from Isuzu to an Information Request (IR) letter sent to them by the agency.Isuzu indicated that while they have an elevated warranty rate on certain model vehicles, there are no consumer complaints, injuries, crashes, property damage, fires or wheel off events related to bearing failures.In the worst case Isuzu explained that drivers were able to reach the roadside or other locations of safety when a bearing failure occurred.Conditions where wheel bearing has seized, the vehicle(s) could continue to be driven for a number of miles, producing a loud noise while the ABS warning light illuminates.Isuzu is aware of the elevated warranty numbers for certain model and MY vehicles and will issue an extended warranty for the subject population and further expand the scope to 2016 vehicles.Walk in van (MY 2012-2016) and diesel 14.5K truck (MY 2011-2016) owners will receive letters informing them that Isuzu is conducting a service campaign for the front wheel bearing assemblies.Customers with 60,000 miles or less on their vehicle should bring their vehicle to their dealer. Isuzu dealers will replace the grease and conduct an inspection of the wheel bearings at no charge. Additionally, Isuzu will replace wheel bearings, if necessary.Customers with over 60,000 miles should contact their dealers to schedule an appointment if they have not already had the wheel bearing grease replaced in the past. These vehicles will be handled on a case-by-case basis.Isuzu will send a letter to all customers and dealers to remind them of the required maintenance schedule for the wheel bearing grease of 30,000 miles or 24 months for all MY 2011-2016 N-Series vehicles and recommend that customers use the manufacturer specified grease during maintenance.ODI's analysis indicates that the warranty rate for wheel bearing failure is less than 1% for a population of vehicles with up to four years in service.There are no known crashes or injuries and Isuzu's extended warranty campaign addresses the issues identified in this investigation.In view of the foregoing, this investigation is closed.The closing of this investigation does not constitute a finding by NHTSA that no safety-related defect exists.The agency will take further action if warranted by the circumstances.
Investigation Documents
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