No matter the condition of your 1990 Eldorado, OPGI has the Mobile Electronics products you need to boost performance and get you back on the road. We currently carry twenty Mobile Electronics items to choose from for your 1990 Eldorado, and our Price Match Guaranteed prices range from as little as $9.99 up to $229.99. OPGI offers Custom AutoSound plus four other trusted brands of Mobile Electronics products for your 1990 Eldorado, to help you find quality parts you can rely on. With OPGI's 45-day return policy and eleven customer reviews, you can shop with the utmost confidence. Enjoy parts delivered directly to your home, or visit our sunny Southern California Showroom & Warehouse to check out our Mobile Electronics items in person.