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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 OGWpqbaxKc2P5g78ixM4h30dRlkrP/o2jb7YGRwxKruiLRH4VY4eLAhLZXW9VePD
 GfpNzwtVIVG6cFfLmou4Ew==

<SEC-DOCUMENT>0001181431-03-028754.txt : 20031103
<SEC-HEADER>0001181431-03-028754.hdr.sgml : 20031103
<ACCEPTANCE-DATETIME>20031103195711
ACCESSION NUMBER:		0001181431-03-028754
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030930
FILED AS OF DATE:		20031103

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SIMPLOT DON J
		CENTRAL INDEX KEY:			0001202368

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15143
		FILM NUMBER:		03974174

	BUSINESS ADDRESS:	
		STREET 1:		8000 S. FEDERAL WAY
		CITY:			BOISE
		STATE:			ID
		ZIP:			83707-0006

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IMPCO TECHNOLOGIES INC
		CENTRAL INDEX KEY:			0000790708
		STANDARD INDUSTRIAL CLASSIFICATION:	MOTOR VEHICLE PARTS & ACCESSORIES [3714]
		IRS NUMBER:				911039211
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		16804 GRIDLEY PLACE
		CITY:			CERRITOS
		STATE:			CA
		ZIP:			90701
		BUSINESS PHONE:		5628606666

	MAIL ADDRESS:	
		STREET 1:		16804 GRIDLEY PL
		CITY:			CERRITOS
		STATE:			CA
		ZIP:			90703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AIRSENSORS INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd21086.xml
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-09-30</periodOfReport><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000790708</issuerCik>
        <issuerName>IMPCO TECHNOLOGIES INC</issuerName>
        <issuerTradingSymbol>imco</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001202368</rptOwnerCik>
            <rptOwnerName>SIMPLOT DON J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>16804 GRIDLEY PLACE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CERRITOS</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90703</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-10-01</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>20000</value></transactionShares><transactionPricePerShare><value>6.60</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>315933</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTra
nsaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-10-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>D</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>20000</value></transactionShares><transactionPricePerShare><value>7.8095</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>295933</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><derivativeTable><derivativeTransaction><securityTitle><value>Stock Options</value></securityTitle><conversionOrExercisePrice><value>6.60</value></conversionOrExercisePrice><transactionDa
te><value>2003-10-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>D</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>20000</value></transactionShares><transactionPricePerShare><value>6.60</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F1"/></exerciseDate><expirationDate><value>2003-10-05</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>common stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>20000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>268000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransa
ction><derivativeTransaction><securityTitle><value>Stock Options</value></securityTitle><conversionOrExercisePrice><value>7.17</value></conversionOrExercisePrice><transactionDate><value>2003-09-30</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>50000</value></transactionShares><transactionPricePerShare><value>7.17</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-09-30</value><footnoteId id="F1"/></exerciseDate><expirationDate><value>2013-09-30</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>common stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>50000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><va
lue>318000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Grant to reporting person of option to buy 50,000 shares of Common Stock exercisable in  annual cumulative increments of 25% of total options granted commencing one year from date of grant, subject to earlier vesting based on prior service as a director, upon death, disablement or retirement at or after age 62; all options expire 10 years from date of grant.</footnote></footnotes><ownerSignature><signatureName>Don J. Simplot</signatureName><signatureDate>2003-10-23</signatureDate></ownerSignature></ownershipDocument>



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