1993 Nissan Quest. Did all models came with ABS? missing!?

You never had ABS! It is impossible to just take off the actuator and sensors and have the brake system work properly! There are brake lines that go to the actuator and from the actuator to your brake calipers. And if it was stolen, your brake warning light would be on all the time and you wouldn't be able to stop the vehicle because the brake fluid wouldn't make it to the calipers. It would just leak onto the ground.