Wtf is a SABB? Assume you mean Saab?
Not saying that I find this a particularly good deal. Buying new for 6k and selling used after 3-4 years for 4k is cheaper. And you won't have to pay excess mileage, to fix any scratch or dent when you return it and so on
Or equally, don't lease for four years, especially a Dacia.
If needs work is under warranty. Do it 1-2 weeks before 3rd anniversary then. They maintain the anniversary as the renewal date
Assuming no work is required. The final year of leasing will have no warranty either.