Please check notes in each part listing to ensure the Idle Air Control Valve is correct for your 1999 MERCURY COUGAR with a 2.0L 1989cc 121 engine. AIRTEX, DELPHI, MOTORCRAFT, STANDARD MOTOR PRODUCTS, & ACDELCO are competing brands, and each brand's Idle Air Control Valve may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a Idle Air Control Valve fits only certain 1999 MERCURY COUGAR models.

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