People who bought a child car seat through GrabOne have been reassured the product is safe.

The deal website emailed those who had bought the Famili-Three-in-One Convertible Car Seat and told them to stop using it because of a safety concern.

GrabOne operations director Tracey Moerkerk said a purchaser had alerted them to a clip restraining the child detaching when the vehicle made a sudden stop at low speed.

“The car seat met the applicable NZ safety standards at the time it was sold but due to the nature of the concern, and operating as a responsible business, GrabOne immediately advised all purchasers of the car seat of the concern,” Ms Moerkerk said.

GrabOne then arranged independent testing of the car seat by a certified child restraint technician.

The test was completed within four working days and the car seat passed the required NZ safety standards for child car restraints.

Buyers were emailed again to tell them the results.

The company selling the car seat through GrabOne was E-mart.co.nz.

Ms Moerkerk wouldn’t say how many of the car seats it had sold because it was commercially sensitive but said “it numbered in the high hundreds”.

Consumer NZ has tested 25 child car seats.