Text-to-pay parking meters have failed at least three times in the past two months.
One man who uses txt-a-park up to 10 times a week says the service isn't good enough.
Tim Kitson claims the system has failed at least six times in the past two weeks, though official figures deny this.
"The most annoying thing is you've got to go all the way through it only to find out at the end that it hasn't worked."
Auckland Transport spokesman Mark Hannan says there have been three days with two-hour outages this year, two of them in January. He is trying to find out why from the provider.