The model number is normally found inside the fridge or freezer. You will likely need to remove the salad drawer or freezer drawer to find the model number plate. Otherwise the model number is likely to be on the side or rear of the appliance.
Bosch Fridge & Freezer Freezer Section Door Seal Genuine
FREEZER DRAW FROM A TALL BOSCH FRIDGE FREEZER KGU32123GB/01
Bosch Fridge Freezer KIV38X22GB Freezer Middle Drawer
Bosch Fridge & Freezer Freezer Rack Holder Inner Panel Genuine
Bosch Fridge & Freezer Middle Freezer Drawer Genuine
Bosch Fridge Freezer KIV38X22GB Freezer Bottom Drawer