A driver stopped by Northland police had drunk so much his alcohol level exceeded the breathalyser's maximum range.
The driver, in his 50s, was spotted swerving back and forth over the centre-line of the road north of Whangarei earlier this year, the Northern Advocate reported.
The breathalyser was unable to give a reading because it only measured blood alcohol levels up to 2000mcg.
The man was blood tested, recording 2290mcg, nearly six times over the legal limit.
He is due to appear in Whangarei District Court on April 13.