Direct ULF replacement?

[Any1else]

Having issues with my iphone 8 pairing with the car. It pairs ok and I can access the phone book etc but when I answer a call I dont hear anything. wondering if the issue is an old ulf and a new phone.

The car is a 2003 and the ulf that is fitted has a label on it with a ref VP3KAF-14B409. HW Rev 07, SW Ref 39.

If I was looking to replace the unit to a more recent unit, what could I fit that would be a direct replacement and be plug n play?

Another odd thing that I noted was that the unit has the bluetooth passcode on the label but it wont work to pair the phone - I need to use 1234 rather than the stated code. Is that weird?

[srhutch]

There were several version upgrades of the ULF and they are just plug and play as long as you get for E85/6 E46 or E39

Com memory the pairing code can be changed through navcoder or inpa, so guessing that's what's been done there

[Any1else]

Great. Thanks srhutch. Will have a look for a newer ULF and see if that does the trick.