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        <link:definition>9952166 - Disclosure - Accumulated Other Comprehensive Income Attributable to SMP</link:definition>
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        <link:definition>9952167 - Disclosure - Stock-Based Compensation Plans</link:definition>
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        <link:definition>9952168 - Disclosure - Employee Benefits</link:definition>
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        <link:definition>9952170 - Disclosure - Fair Value Measurements</link:definition>
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        <link:definition>9952171 - Disclosure - Earnings Per Share</link:definition>
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        <link:definition>9952172 - Disclosure - Industry Segments</link:definition>
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        <link:definition>9952173 - Disclosure - Net Sales</link:definition>
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        <link:definition>9952174 - Disclosure - Commitments and Contingencies</link:definition>
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        <link:definition>9955512 - Disclosure - Restructuring Expenses (Tables)</link:definition>
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        <link:definition>9955513 - Disclosure - Inventories (Tables)</link:definition>
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        <link:definition>9955514 - Disclosure - Acquired Intangible Assets (Tables)</link:definition>
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        <link:definition>9955515 - Disclosure - Leases (Tables)</link:definition>
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        <link:definition>9955516 - Disclosure - Credit Facilities and Long-Term Debt (Tables)</link:definition>
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        <link:definition>9955517 - Disclosure - Accumulated Other Comprehensive Income Attributable to SMP (Tables)</link:definition>
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        <link:definition>9955518 - Disclosure - Stock-Based Compensation Plans (Tables)</link:definition>
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        <link:definition>9955519 - Disclosure - Derivative Instruments (Tables)</link:definition>
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        <link:definition>9955520 - Disclosure - Fair Value Measurements (Tables)</link:definition>
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        <link:definition>9955521 - Disclosure - Earnings Per Share (Tables)</link:definition>
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        <link:definition>9955522 - Disclosure - Industry Segments (Tables)</link:definition>
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        <link:definition>9955523 - Disclosure - Net Sales (Tables)</link:definition>
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        <link:definition>9955524 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
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        <link:definition>9955525 - Disclosure - Basis of Presentation (Details)</link:definition>
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        <link:definition>9955526 - Disclosure - Summary of Significant Accounting Policies (Details)</link:definition>
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        <link:definition>9955527 - Disclosure - Business Combinations (Details)</link:definition>
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        <link:definition>9955528 - Disclosure - Restructuring Expenses - Narrative (Details)</link:definition>
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      <link:roleType id="RestructuringExpensesScheduleofRelatedtotheSeparationProgramWorkforceReductionDetails" roleURI="http://smpcorp.com/role/RestructuringExpensesScheduleofRelatedtotheSeparationProgramWorkforceReductionDetails">
        <link:definition>9955529 - Disclosure - Restructuring Expenses - Schedule of Related to the Separation Program Workforce Reduction (Details)</link:definition>
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      <link:roleType id="SaleofReceivablesDetails" roleURI="http://smpcorp.com/role/SaleofReceivablesDetails">
        <link:definition>9955530 - Disclosure - Sale of Receivables (Details)</link:definition>
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        <link:definition>9955531 - Disclosure - Inventories (Details)</link:definition>
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        <link:definition>9955532 - Disclosure - Acquired Intangible Assets - Schedule of Acquired Identifiable Intangible Assets (Details)</link:definition>
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        <link:definition>9955533 - Disclosure - Acquired Intangible Assets- Narrative (Details)</link:definition>
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        <link:definition>9955534 - Disclosure - Leases- Narrative (Details)</link:definition>
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      <link:roleType id="LeasesScheduleofLesseeQuantitativeDisclosuresRelatedToOperatingLeasesDetails" roleURI="http://smpcorp.com/role/LeasesScheduleofLesseeQuantitativeDisclosuresRelatedToOperatingLeasesDetails">
        <link:definition>9955535 - Disclosure - Leases - Schedule of Lessee Quantitative Disclosures Related To Operating Leases (Details)</link:definition>
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      <link:roleType id="LeasesScheduleofComponentsofLeaseExpenseDetails" roleURI="http://smpcorp.com/role/LeasesScheduleofComponentsofLeaseExpenseDetails">
        <link:definition>9955536 - Disclosure - Leases - Schedule of Components of Lease Expense (Details)</link:definition>
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      <link:roleType id="LeasesScheduleofSupplementalCashFlowInformationDetails" roleURI="http://smpcorp.com/role/LeasesScheduleofSupplementalCashFlowInformationDetails">
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  <xs:element id="smp_WireSetsAndOtherMember" abstract="true" name="WireSetsAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_ACSystemComponentsMember" abstract="true" name="ACSystemComponentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_OtherThermalComponentsMember" abstract="true" name="OtherThermalComponentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_AirConditioningMember" abstract="true" name="AirConditioningMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_EngineCoolingMember" abstract="true" name="EngineCoolingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_EngineEfficiencyMember" abstract="true" name="EngineEfficiencyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_LightVehicleMember" abstract="true" name="LightVehicleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_CommercialVehicleMember" abstract="true" name="CommercialVehicleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_ConstructionAgricultureMember" abstract="true" name="ConstructionAgricultureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_AllOtherMember" abstract="true" name="AllOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_EuropeExcludingPolandMember" abstract="true" name="EuropeExcludingPolandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_OtherForeignMember" abstract="true" name="OtherForeignMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_AsbestosRelatedDamagesAndLegalCostsMember" abstract="true" name="AsbestosRelatedDamagesAndLegalCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_AsbestosRelatedDamagesMember" abstract="true" name="AsbestosRelatedDamagesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_AsbestosRelatedLegalCostsMember" abstract="true" name="AsbestosRelatedLegalCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smp_LossContingencyIncreaseDecreaseOfEstimatedPossibleLoss" abstract="false" name="LossContingencyIncreaseDecreaseOfEstimatedPossibleLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smp_LossContingencyPayments" abstract="false" name="LossContingencyPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
