Anyone caught knowingly importing affected cars could face penalties, although Customs staff would be able to use discretion in issuing penalties during a two- to three-month grace period where small numbers of cars were imported in genuine error.
"But that would be the exception rather than the rule."
There was also a ban on selling affected cars that hadn't had the airbags switched.
The cost of doing so fell to the car manufacturer and was free for consumers and retailers.
All of the 50,000 affected cars in New Zealand must have their airbags replaced by December next year.
Although he expected to see more airbags replaced in the next few months, keeping momentum going over the 18 months would be a challenge, which the Government needed to rise to, Faafoi said.
"It's a rare thing to have a compulsory recall like this, so the pressure is on us to do it and do it well."
The Takata recall is only the second compulsory recall in New Zealand history, and the largest of cars by far.
It was made compulsory after a voluntary recall had little impact over four years.
Faafoi expected to have a more exact idea of how many cars had had their airbags switched when the first session of a monthly group meeting was held on June 12.
However, anecdotally he'd heard technicians working for the manufacturers responsible for changing switching the airbags out had been very busy since the recall was announced on April 4.
A spike on the New Zealand Transport Agency's (NZTA) recalls website after the announcement was another encouraging sign people were taking the announcement seriously.
Because some of the cars affected were so old they may not be on the road anymore, Faafoi said 100 per cent compliance was not the goal, but he hoped that in a year the country would be tracking at about 70 per cent.
If it looked like people weren't doing anything, the Government would consider options like failing Warrants of Fitness if the airbags were still installed.