Navigation Plus RNS-E
The Navigation Plus RNS-E radio was on ISO for earlier models, 2003 and 2004 versions were normally on quadlock.
This came with half rear amplified sound system or the full BOSE system. Factory BOSE system will have the speaker grills with a BOSE logo on them. These require the BOSE specific leads.
This unit came player came with non-amplified, half rear amplified sound system or the full BOSE system. You can tell which you have by removing the stock radio and checking the 8 pin speaker block. If it is fully populated, you are non-amplified. If 4 pins are populated, you are rear amplified. Factory BOSE system will have the speaker grills with a BOSE logo on them. These require the BOSE specific leads.