Please check notes in each part listing to ensure the Rear Window Defroster Relay is correct for your 2009 CHEVROLET IMPALA with a 3.9L engine. Special restrictions like "California only" or "with sport package" may indicate a Rear Window Defroster Relay fits only certain 2009 CHEVROLET IMPALA models.
Clicking a "More Info" link will display a picture and/or other details about that Rear Window Defroster Relay in a separate window (you may need to turn off your pop-up-blocking software for this to work).
After choosing a Rear Window Defroster Relay, click the "Add Part" button. Shipping costs will be shown on the Shopping Cart page. You may use your browser's Back button or click "Find More Parts" to find more Electrical-Switch & Relay parts, other CHEVROLET IMPALA parts or parts for a different vehicle. Please try our Interactive Catalog (click link above) for faster searching. Both catalogs use the same shopping cart so any auto parts you've already chosen for your 2009 CHEVROLET will not be lost if you switch.