WTB Gen1 Nav hard drive in Member Buy & Sell Area Posted January 29, 2019 · Report reply I'm seeking a hard drive unit for the NAV/GPS computer (pn# 8684150040) in a 1998 LS400. I'm not looking for the whole nav computer, just the hard drive that is mounted inside of the unit. I'm aware that the last update was 2004 and don't care, I would just like the NAV to function for nostalgia purposes. Please contact me at firstname.lastname@example.org, as I don't come here much. Thank you!