The illumination of the entertainment/navigation screen and switches may fail. This is generally caused by a failed circuit board. Acura has extended the warranty on the audio display unit to 7 years or 105,000 miles for the 2004 model year only.
2011 Acura TSX Problem Reports
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A loud rattle type noise may be noted from the engine after a cold start. This can be caused by a faulty valve timing control actuator. Replacing the failed actuator will commonly correct this noise issue.