2004 Subaru Impreza Owner's Manual - Page 259

Interior equipment Cigarette lighter socket UG6509DA The electrical power outlet located on the lower part of the instrument panel can be used as cigarette lighter socket. A cigarette lighter plug is an optional accessory. It is available from your SUBARU dealer. The cigarette lighter socket may also be used as a power source for an in-car use electrical appliance. lighter plug. Do not use non-genuine cigarette lighter plugs in the socket. Doing so may cause a short-circuit and overheating, resulting in a fire. " If the socket is ever used for a plug-in accessory such as a mobile phone, that may damage the portion of the socket's internal mechanism that causes a cigarette lighter plug to "pop out" after its lighter element is heated. Therefore, do not place a cigarette lighter plug in a socket that has been used, even once, to power a plugin accessory. Doing so may cause the plug to stick and overheat, creating a potential fire hazard. " Do not place any foreign objects, especially metal ones such as coins or aluminum foil, into the socket. That could cause a short circuit. " The electrical power outlet located on the lower part of the instrument panel is originally designed to use a SUBARU genuine cigarette 6-10