NSW Police are investigating former Auburn deputy major Salim Mehajer over alleged fraudulent car insurance claims.

There have been a series of similar collisions allegedly involving cars registered to Mr Mehajer or his companies, which have been claimed through insurance, Seven News reported.

On Thursday police confirmed the matter had been referred to it and an investigation was underway.

Mr Mehajer was involved in a car accident on Monday on his way to a court appearance in Sydney.

He was taken to Westmead Hospital in a neck brace.

Sorry, this video has expired Salim Mehajer involved in 'serious' car crash on way to court to face assault hearing

He was due to face charges over an alleged assault on a taxi driver and a Channel Seven reporter in April.

Mr Mehajer is accused of throwing the driver's EFTPOS machine at him and stealing his phone and throwing it out of the car outside the Star casino.

The court was told the car accident exacerbated Mr Mehajer's existing back injury and on Tuesday a magistrate adjourned the case until the end of January next year.

A second assault charge against Mr Mehajer involving the alleged deliberate jamming of a reporter's arm in the door of a car has also been adjourned until February.

Mr Mehajer will remain on bail.

A spokeswoman for NRMA Insurance said the company would not disclose "any investigation activity".

"Fraud and claim exaggeration have recently been at historically high levels and we're pleased to see that the NSW police taskforce has already resulted in many insurance fraud arrests and prosecutions," she said.

Meanwhile, a civil case involving Mr Mehajer returns to court on Thursday. He has been ordered to pay cleaner Anping Yan $25,000 for work completed on a Western Sydney apartment block in September 2013 to July 2014.

Mr Mehajer is disqualified from managing corporations until November 2018 and is also facing charges over alleged electoral fraud offences.

His sister Fatima Mehajer pleaded guilty to 77 charges related to rigging the 2012 Auburn council elections in June.