Main said posties would use bicycles, e-bikes or walk where possible. Normal services will resume in rounds across the country as each Paxster passes its check or is repaired – so delays could differ in different locations.
"It's too soon to tell yet exactly how long delays could be, but at this stage we are estimating initial delays of about 1-3 days."
Main said the delays would not impact items delivered by courier.
Capable of speeds of up to 45km/h, the golf cart-style delivery vehicles began a nationwide roll-out in 2019.
According to data released by NZ Post under the Official Information Act, Paxsters were involved in 30 crashes in 2019.
A spokesperson for NZ Post said the recent audit of the Paxster buggies was not related to the death in December 2021 of postal worker Sam Kelman.
Kelman, 31, died after the Paxster buggy he was operating reportedly rolled down a bank in Tawa.