I just purchased a 03. My radio and speakers work great but the tape deck is ancient.  I am using this to plus plug into the accessory jack.  Now it connects  my phone via Bluetooth to the speakers.  Works great for music and gps! Got it from Amazon  
 TROND® 2 in 1 Wireless Bluetooth 4.1 Audio Transmitter and Receiver - Bluetooth Transmitter for TV, iPod, MP3, CD Player or e-Reader; Bluetooth Receiver for Car or Home Stereo   
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