Mahindra & Mahindra registered a 33 per cent de-growth in the passenger vehicle segment, while sales in the commercial vehicle segment fell by 18 per cent.
Other players like Renault India, Skoda Auto, Volkswagen India saw their market shares increase marginally during April-August this year.
The Indian automobile sector has been going through a slowdown due to several reasons including, high GST and liquidity crunch.
While production of mini and compact segment cars went down 34.1 per cent as compared to last year, that of utility vehicles declined 34.85 per cent.
Although the auto industry is hopeful of a sales upturn during the upcoming festival season, SIAM urged the government to reduce the GST rates from 28 to 18 per cent to create demand.
Maruti Suzuki continued its negative trajectory with a drop of 36 per cent while Tata Motors suffered the heaviest blow with a 60 per cent drop.