Same problem with my nexon diesal 12/2017. Run 30k kms., Out of warranty but service center refused free of cost replacement water pump. Tata moters use low qwality water pump in nexon for responsible this issue. Everyone which nexon owner who is under warranty normal or extended should be replacement water pump due to coolant leak issues. As a suggestion... Mine nexon xm diesal 2017 30800 km. Running have issue coolant leak under body. Its issue is many nexon so that tata Motors should be replacement water pump free due to low qwality of water pump. Tata Motors should be resolve this issue in all nexon as soon as due to avoid break down problem towards own side.
I am a manza owner had alot of issues of coolant leakage firstly from radiator then from 2 engine tikali and took year to rectify the problem and run on water mostly then engine head issue arrise Today booked glanza eventhough safety is 0 but Suzuki and toyota reliablity matters...