There still are a few Maruti Suzuki models, like the Celerio, Wagon R 1.0, the Ciaz, the Ignis and the Alto K10, which are yet to receive BS6 compliant engines. It is important to note that the above mentioned models are all petrol-powered as the company has earlier announced that it will stop selling diesel cars from April 1, 2020. The Fiat-sourced 1.3-litre diesel engine that powers many Maruti models will not be upgraded for BS6 compliance. Maruti had also introduced an in-house 1.5-litre diesel engine recently, which is available on the Ertiga and the Ciaz, but it will not see a BS6 version anytime soon either. This means that the entire Maruti line-up will be petrol-only post April 1, 2020. Diesel-only models like the Brezza and S-Cross will be sold with 1.5-litre petrol engines. The company has already begun road-testing the Vitara Brezza petrol, which will see a market launch sometime in February next year.