MY 2004 VOLVO XC90 HAS EXPERIENCE A SUDDEN ELECTRICAL FAILURE. WHILE DRIVING IN CITY CONDITIONS ALL INTERNAL ELECTRONICS INCLUDING SPEED & FUEL GAUGES, TURN LIGHT INDICATORS, AUDIO SYSTEM, AIR CIRCULATION AND SUPPLEMENTAL RESTRAINT SYSTEM HAVE TURNED OFF WHILE THE ENGINE CONTINUED TO OPERATE. THIS MADE THE CAR IMPOSSIBLE TO DRIVE AS NO FEEDBACK ON SPEED OR ABILITY TO INDICATE A TURN OR A STOP WAS POSSIBLE. THIS OCCURRED SUDDENLY AND WITHOUT ANY WARNING. I WAS UNABLE TO FIX THIS BY RESTARTING THE CAR. ACCORDING TO BASIC RESEARCH, THIS IS A COMMON ISSUE WITH VOLVO CARS MADE CIRCA 2003-4 AND INVOLVE A DEFECTIVE CEM (CAR ELECTRONICS MODULE). IN OTHER INCIDENTS ENGINES HAVE ALSO SHUT DOWN UNEXPECTEDLY AND BRAKES BECAME INOPERABLE. THIS IS A SERIOUS SAFETY ISSUE THAT NEEDS TO BE ADDRESSED. *TR