Three others received moderate injuries in the crash.
Investigations into the crashes were ongoing, police said.
The five deaths mark a rise from the Easter road toll last year when no fatalities were recorded while the country was in level-4 lockdown to stop the spread of Covid-19.
In 2019, the New Zealand Easter road toll was four.
Waka Kotahi/NZTA Auckland operations manager Rua Pani said there were simple things motorists could do to stay safe on the roads.
"Check your vehicle is safe to drive. Check your tyres, wipers, lights and indicators, and ensure you have a valid Warrant of Fitness before you leave," said Pani.