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  <xsd:element id="prts_LineOfCreditFacilityAvailabilityRequiredAmount" name="LineOfCreditFacilityAvailabilityRequiredAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="prts_AmortizationOfIntangibleAssetsIncludingDiscontinuedOperations" name="AmortizationOfIntangibleAssetsIncludingDiscontinuedOperations" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="prts_DebtInstrumentCashDominionPeriodNumberOfDaysBelowMinimumExcessAvailability" name="DebtInstrumentCashDominionPeriodNumberOfDaysBelowMinimumExcessAvailability" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="prts_LineOfCreditFacilityMinimumAvailabilityRequiredTriggerThresholdConsecutiveDays" name="LineOfCreditFacilityMinimumAvailabilityRequiredTriggerThresholdConsecutiveDays" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="prts_LineOfCreditFacilityMinimumAvailabilityRequiredUnderAvailabilityBlockAmount" name="LineOfCreditFacilityMinimumAvailabilityRequiredUnderAvailabilityBlockAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="prts_Sharebasedcompensationarrangementbysharebasedpaymentawardequityinstrumentsotherthanoptionsvestedandexpectedtovestweightedaveragegrantdatefairvalue" name="Sharebasedcompensationarrangementbysharebasedpaymentawardequityinstrumentsotherthanoptionsvestedandexpectedtovestweightedaveragegrantdatefairvalue" nillable="true" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="prts_Sharebasedcompensationarrangementbysharebasedpaymentawardequityinstrumentsotherthanoptionsaggregateintrinsicvaluevestedandexpectedtovest" name="Sharebasedcompensationarrangementbysharebasedpaymentawardequityinstrumentsotherthanoptionsaggregateintrinsicvaluevestedandexpectedtovest" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="prts_ExpirationYearAxis" name="ExpirationYearAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="prts_ExpirationYearDomain" name="ExpirationYearDomain" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="prts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVest" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVest" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="prts_SupplementalCashFlowInformationRelatedToOurOperatingLeasesAbstract" name="SupplementalCashFlowInformationRelatedToOurOperatingLeasesAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="prts_CashPaidForAmountsIncludedInMmeasurementOfLeaseLiabilitiesAbstarct" name="CashPaidForAmountsIncludedInMmeasurementOfLeaseLiabilitiesAbstarct" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="prts_ShareBasedCompensationExpenseCapitalizedInPropertyAndEquipment" name="ShareBasedCompensationExpenseCapitalizedInPropertyAndEquipment" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="prts_LineOfCreditFacilityContingentIncreaseAggregateMaximumBorrowingCapacity" name="LineOfCreditFacilityContingentIncreaseAggregateMaximumBorrowingCapacity" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element id="prts_RestrictedStockUnitsRsuAndEmployeeStockOptionsMember" name="RestrictedStockUnitsRsuAndEmployeeStockOptionsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfLineOfCreditFacilityAvailabilityRequiredAmountOnAggregateRevolvingCommitment" id="prts_PercentageOfLineOfCreditFacilityAvailabilityRequiredAmountOnAggregateRevolvingCommitment" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfLineOfCreditFacilityMinimumAvailabilityRequiredUnderAvailabilityBlockAmountOnAggregateRevolvingCommitment" id="prts_PercentageOfLineOfCreditFacilityMinimumAvailabilityRequiredUnderAvailabilityBlockAmountOnAggregateRevolvingCommitment" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IssuanceOfSharesInConnectionWithOfficersAndDirectorsStockPurchasPlan" id="prts_IssuanceOfSharesInConnectionWithOfficersAndDirectorsStockPurchasPlan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IssuanceOfSharesInConnectionWithDirectorsAndOfficersStockPurchasePlanInShares" id="prts_IssuanceOfSharesInConnectionWithDirectorsAndOfficersStockPurchasePlanInShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StockAwardsRelatedToOfficersAndDirectorsStockPurchasePlanFromPayrollDeferralOperatingActivities" id="prts_StockAwardsRelatedToOfficersAndDirectorsStockPurchasePlanFromPayrollDeferralOperatingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
</xsd:schema>
