Chagrin;638437 said:Can someone please advise why it is necessary to keep the original BMW Business HU even though you are installing an aftermarket HU?
inergen;659917 said:1. you won't get a decent price by off-loading your stock HU
2. there's an option for you to revert to stock one day.
Chagrin;659967 said:I meant why do people have the original HU hooked up additionally, even though they have installed the aftermarket HU.
I heard that PML needs to original HU for software updates etc? (though for the life of me, I don't see why)
Some is because the reverse sensors sound is integrated into your stock HU, that's why retaining the original HU.Chagrin;659967 said:I meant why do people have the original HU hooked up additionally, even though they have installed the aftermarket HU.
I heard that PML needs to original HU for software updates etc? (though for the life of me, I don't see why)