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 Freezer Drawer Bottom KIV38X22GB/05 KIV38X22GB/06 KIV38X22GB/07
Bosch Freezer Drawer Bottom Basket KIV32V01GB/02 KIV32V20GB/01 KIV32X22GB/01
Bosch Freezer Drawer Bottom Basket KIV32X23GB/02 KIV32X23GB/03 KIV32X23GB/04
Bosch Freezer Drawer Bottom KIV38X22GB/02 KIV38X22GB/03 KIV38X22GB/04
Bosch Classixx Freezer Drawer Bottom 448601 (check fits list below )
Bosch Freezer Drawer Front Panel Handle Bottom Basket KIV87VSE0G/01