1)These parts are being part marked since 8-years and this is the first time that the error in part marking was noticed.  As per the analysis carried out the part numbers D57650009206 and D57650010206 are identical in shape but only varies by 2-mm in the dimensions when checked which cannot be found through naked eyes/sight.
2)D57650009 and D57650010  both LH & RH looks identical and probable chances of the same misinterpretation exist.
