Not sure which 2004 Toyota Tundra Mobile Electronics are right for you? We have over 4936 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Wayne B from Colorado Springs, CO said, "The EchoMaster was easy to install and the instructions were well written and understandable. It is flexible to use and move between vehicles. The design is well executed and designer apparently understands the challenges in backing large vehicles with blind spots. The unit performs as advertised and is a big help in backing in parking lots and parallel parking spaces."