I replaced the BM53 radio module in my friend's car with a brand new one we ordered from Tischer BMW. His old BM53 radio was from a 2001 (no AUX, no Sirius support). He has an MKIV widescreen that is updated to 4-1/00 software and is using the latest generation TCU (84109195455) RealOEM.com BMW E46 320i Component parts SA 639 / SA 640 trunk.

All was working with the TCU before--in fact, I had enabled voice recognition with NavCoder when he first installed the TCU...

Anyhow, after some looking at junkyards / ebay, we decided that the easiest way to get an updated BM53 radio, was to buy one from Tischer and trade in the old one as part of the core. This is the BM53 model I bought: 65126988276. RealOEM.com BMW E46 330i ON BOARD MONITOR RADIO . The module plugged right in (a direct swap), and the radio / Sirius work great. The only issue is that "Telephone" has disappeared from the Nav menu screen. When I try to read the TCU in NavCoder, "Code Phone" is grayed out and it shows up as an unrecognized device.

Any suggestions? Do you think the BM53 radio needs to be coded?

Thanks!