SUMMARY OF INFORMATION FROM MANUFACTURER:NONEANALYSIS:INSTALLATION OF AN IDLER ARM ASSEMBLY WITHOUT A COTTER PININSTALLED IN THE CASTLE NUT MAY RESULT IN THE CASTLE NUT SEPARATING, WHICHCOULD LEAD TO THE IDLER ARM SEPARATING FROM THE DRAG LINK, AND LOSS OFSTEERING CONTROL OF THE VEHICLE.PROPOSED ACTION:OPEN A PE.SEND A IR.