The loss-making subsidiary of US giant General Motors said the cars were ADAM and Corsa models delivered since May 2014.
"About 8,000 of these vehicles have been manufactured with a steering system part that did not meet specification," the carmaker said in a statement.
"To avoid any risk, these cars should not be driven prior to inspection."
The company said customers could check on their website from Saturday whether their vehicle was affected, and that it would also contact buyers directly.
The warning was made after a discovery during a quality control at the car factory. The company said it was not aware of any accident or injury caused by a steering part.