Please check notes in each part listing to ensure the Idle Air Control (IAC) Valve is correct for your 1990 BUICK CENTURY with a 3.3L 204 engine. AIRTEX / WELLS, DELPHI, STANDARD MOTOR PRODUCTS, & ACDELCO are competing brands, and each brand's Idle Air Control (IAC) Valve may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a Idle Air Control (IAC) Valve fits only certain 1990 BUICK CENTURY models.
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Manufacturer & Part #
STANDARD MOTOR PRODUCTS Part # AC14
Direct OE Replacement (#17112145, 17112650, 217423, 25533222)