Logic of naming sensors in VW-group is simple it contains "G" (german "Geber") + sensor number. The sensor number is unique. Here you can find fitting location, connectors and pins description, some information about sensors signals.
To our mind, sensors information is reference, so there is only simple search by sensor number.
Crash sensors G256- side airbag
crash sensor rear driver side and G257- side airbag crash sensor rear passenger
side are fitted at the bottom of the C-pillar on the 3- and 5-door versions
(similar fitting locations).
A -G283 - Front airbag crash
sensor, driver side
G284 - Front airbag crash
sensor, passenger side
B - G256 - Side airbag crash
sensor, rear driver side
G257- Side airbag crash
sensor, rear passenger side