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2004 Lexus RX330 Problems
A shift "lag" may be noted when accelerating from speeds of 10 to 20 mph. A software update for the transmission control module has been released which may correct this concern. Software updates are commonly most effective on newer vehicles. Higher mileage vehicles may exhibit a similar symptom caused by a component failure. However, whenever major transmission repairs are performed the transmission software should be checked and updated as necessary.
The supplemental restraints system (SRS) warning light may illuminate with code B0111 and/or B0116. Our technicians tell us Lexus has several service bulletins regarding the SRS system. It is not uncommon to replace one or more airbags to correct these fault codes.
Various user interface issues regarding GPS, radio system, and heater controls, along with bluetooth operation have been addressed with a software upgrade. Our technicians recommend that if you have issues with these systems, checking for the latest software should be the first step in diagnoses.
The problem is - GPS (Nav) console and the cost: New - $6,000, Rebuilt - 1700. If your GPS goes blank that is your problem. The reason the heating/AC and clock also drops off-line is Lexus designed a single-point-failure. Because you can adjust the heat/AC and the clock using the GPS touch screen, the GPS fails the rest fails.