2001 - 2002 - 2003 - 2004 Ford Focus Radio AM FM CD Player with Auxiliary Input Added to the Face for use with iPod, iPhone, mp3 Players, Satellite Radio, Android Phones and more! Part Number: YS4F-18C838-DA Compatible Part Numbers: 3S41-18C838-BA. Please confirm that these are the plugs that you need before purchase as there is another version of this radio that used a different, incompatible sound system. This listing is for a 2001-2004 Ford Focus AM FM CD player that has been professionally remanufactured and upgraded with an auxiliary input. With the auxiliary input, you can listen to any music device with a 3.5 mm headphone or auxiliary out in full quality, the way it was meant to be heard! Operation of the iPod jack is a snap just plug your accessory in and you will be listening to it through all of your car speakers. Tired of listening to static over your FM modulated satellite radio? Just plug it right in and listen to satellite radio the way it is supposed to sound! Use the volume control on the radio as you usually would. Same with the bass, treble. Press the clock button and you have clock display. In addition, since the input is right on the face of the radio, there are no clumsy breakout boxes to install and mount. When the aux input is not in use, the radio will function as factory! This radio has been remanufactured, upgraded, cleaned, thoroughly checked and then checked again before shipment. No codes required, it will plug and play! Please contact the seller if you have any questions.