A man has been charged with murder two decades after he was first named as a "main suspect" in the suspicious death of Sydney business owner Hasan Dastan.

Kubilay Kilincer, 58, was arrested and charged late on Wednesday evening over the death of his former employer Mr Dastan, who was found dead underneath a vehicle at his car wrecker business in Blacktown in 1995.

The body of 52-year-old Hasan Dastan was found inside a workshop at his car wrecker business.

The arrest comes less than two days after Mr Kilincer told Nine News he hoped authorities “find who did it”, as police offered a $1 million reward for information into Mr Dastan's death.

At his Granville home Mr Kilincer said he was "the last person to see [Mr Dastan] alive,” but that he wanted to put it “all behind me”.