The company's total vehicle sales last month stood at 3,47,655 units, up 1%, as against 3,45,438 units in the same month a year earlier, the two-wheeler major said in a BSE filing.
In commercial vehicles category, Bajaj Auto's sales during the month stood at 40,311 units, down 7% as against 43,576 units in May last year.
Bajaj Auto's exports declined 10% during the month to 1,43,421 units from 1,58,824 units in the corresponding period a year ago, it added.