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4WS : 4G and 5G compatibility

Posted: Mon Oct 14, 2013 1:43 pm
by Sailor
I've got eye-ache from searching for the answer to these questions:

Are 4G and 5G rear wheel steering systems the same, or at least interchangeable?
If not, what are the differences?

Posted: Mon Oct 14, 2013 2:04 pm
by wurlycorner
The ECU is completely different, at least.