Steering module is a part of automotive suspension system which provides a means for an accurate vehicle placement and stability\ncontrol. Components such as steering knuckle are subjected to fatigue failures due to cyclic loads arising from various driving\nconditions. This paper intends to give a description of a method used in the fatigue life reliability evaluation of the knuckle used\nin a passenger car steering system. An accurate representation of Belgian pave service loads in terms of response-time history\nsignal was obtained from accredited test track using road load data acquisition. The acquired service load data was replicated\non durability test rig and the SN method was used to estimate the fatigue life. A Pearson system was developed to evaluate the\npredicted fatigue life reliability by considering the variations in material properties. Considering random loads experiences by the\nsteering knuckle, it is found that shortest life appears to be in the vertical load direction with the lowest fatigue life reliability\nbetween 14000ââ?¬â??16000 cycles. Taking into account the inconsistency of the material properties, the proposed method is capable of\nproviding the probability of failure of mass-produced parts.
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