The vehicle at the centre of a corruption inquiry was involved in a "hit-and-run" accident in Surry Hills while in the possession of Amanda and Eric Roozendaal, who was at the time the NSW roads minister, it has been revealed.

The Independent Commission Against Corruption is investigating the circumstances surrounding a $10,000 discount provided to Mr Roozendaal, then the state's roads minister, on a new Honda CRV that was organised by the family of ALP heavyweight, Eddie Obeid.

MP Eric Roozendaal ... the inquiry heard a car given to him was involved in a hit-and-run. Credit:Kate Geraghty

A property developer and business partner of the Obeid family, Rocco Triulcio, on Friday told a corruption inquiry he could not explain why his company debited a $44,800 car purchase against an Obeid loan account.

Counsel assisting the Commission, Geoffrey Watson SC today stunned the proceedings when he asked Nata Re, Mr Triulcio's sister, whether she remembered a phone call from a NSW Police constable based at the Surry Hills police station.