Non-authorised agents hold a 22 percent share of the market in the first quarter, with Honda, Toyota, Mercedes-Benz being hot sellers.
Authorised distributors complain that parallel importers are competing unfairly due to factors such as the fixed evolution coefficient carbon emission values.
The parallel imports of cars in the first quarter saw a surprise leap, with the facelifts of popular models among the factors for demand being revitalised.
Parallel imports of cars fell 24.5 percent, but super luxury models chalk up strong numbers as buyers rush to beat new progressive taxes.
Parallel importers in Singapore are resorting to a ploy to trade their new cars as used cars, in a bid to avoid hefty taxes.
The recent slump in car sales has forced some local distributors to supplement their car sales by taking a dip in the parallel importer market