In 1/2005 Toyota sent its dealers a tech bulletin (EL002-05) describing a defect in its 2004 Highlander, Prius and Land Cruiser models: "Some customers may experience various malfunctions occurring with the multi display". They state that a revised multi-display unit had been developed to resolve the problem and that a replacement unit would be installed IF the malfunction occurred within the 36K mile warranty period. When my 04 Highlander unit began to fail I contacted Toyota and they stated that yes, there was a potential problem with the system but that the repair would only be covered thru the warranty period. It's obvious Toyota hoped the faulty wiring would hold together through the warranty period and thus free them from responsibility. Toyota is reaping more profits from its error every time one of these units malfunctions - a new unit for the Highlander costs $5500. On
Prius MFD there is a dissection of a failed Prius multi-display unit. They then compare it with a disassembled working unit. They show clearly that part of the wiring was re-engineered in order to remedy the problem. If you're comfortable working with a computer circuit board, the website shows the repair procedure. I am looking into a replacement unit from oemvalue.com. Shame on Toyota for this cover-up.