# Why can't I move some of the objects in this model?

I recently downloaded this model of a car. This model consists of several objects. For some of the objects (such as "Neumatico"), I can change the location of the object using the Python Console with

bpy.data.objects['Neumatico'].location = [0,0,-1]


or in the Properties Editor via

Properties -> Object -> Transform -> Location

Both methods successfully move the object in the 3D View. However, for other objects (such as "Detalles 1" in the model), neither the Python nor Properties techniques above move the object. Although both techniques do change the location values, the objects do not move in the 3D view. Also, the behavior I described for location also occurs for rotation.

I also tried using the command bpy.context.scene.update() but that didn't seem to help.

Why can I move some parts of the model, but not others?