Maruti Suzuki India — maruti swift 2017 engine got crack while driving

I had a strange incident of Maruti Swift 2017 vxi, this car has been serviced on time and was under warranty, while driving on the middle of the road, engine got cracked with loud sound and oil start over flowing. Had to tow the car to the maruti workshop after inspecting and detailed evaluation they said they would replace the engine with no cost. Maruti should replace the car as the engine got crack how do we know other parts are well and good. very confused. Maruti customer care people were so good and they were so helpful so couldn't say anything as they dealt professionally.