The company had sold a total of 1,13,759 units in September 2015, Maruti Suzuki India (MSI) said in a statement.
Domestic sales were at 1,37,321 units as against 1,06,083 units in the same month last year, up 29.4 per cent, it said adding this was "also the company's highest ever domestic monthly sales" beating the previous best of 1,25,778 in July this year.
Sales of mini segment cars, including Alto and WagonR models, were at 44,395 during the month as against 35,570 units in the year-ago period, a growth of 24.8 per cent.
The company's Dzire Tour model saw a growth of 23 per cent at 3,973 units from 3,229 units in the same month last year while the mid-sized sedan Ciaz sold 6,544 units as against 4,291 last year, a jump of 52.5 per cent.
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The utility vehicles consisting of Gypsy, S-Cross, Vitara Brezza and Ertiga saw sales of 18,423 units as against 6,331 in September last year, a jump of 191 per cent, the company said.
Exports during the month stood at 11,822 units as against 7,676 in the same period a year earlier, up 54 per cent.