Initially, Renault Kwid only comes with a petrol engine but a CNG kit can be fitted with it. It is always recommended to get the CNG kit fitted from the authorized service center so that you can avail the warranty services as well. If you get it installed from some other sources, then it may hamper your warranty. However you have to sacrifice with the power to get more fuel economy. Click here to find the Renault service centres by entering your city.
Yes you can get it installed. But we won't recommend it . Since, it will void warranty. CNG is best suited alternate fuel option instead of LPG. However, there are no CNG filling stations available in Faizabad UP. The nearest one is in Lucknow.
We would not recommend a CNG kit on Brio for it doesn't have a lot of low end torque in the first place and the kit makes it worse. On CNG, it will require a lot of throttle input to get it going in the first and second gear. Hence, we would not recommend you to get CNG kit fitted..