The entire 400-strong fleet of electric yellow and red postal buggies has been removed from the streets after a recent audit uncovered a maintenance issue.
Delays of a few days were expected for all mail delivered by the Paxster buggies as posties ride bikes or walk their usual mail routes.
NZ Post chief operating officer Brendon Main said a fleet audit had identified a maintenance issue and each Paxster needed to be individually checked.
"NZ Post has temporarily removed our electric Paxsters from service today as a precautionary measure.
"As checks are completed, we expect to see Paxsters returned to service progressively over the next couple of days or, where they need repairing, as soon as possible."