A pedestrian is fighting for life after being hit by a car in Sydney‘s southwest.

The 58-year-old man was walking on Cabramatta Rd in Mount Pritchard when he was struck by a BMW sedan about 11.15pm on Tuesday.

Paramedics rushed to the scene and found the man unconscious nearby.

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He was treated for critical head injuries, before being taken to Liverpool Hospital.

The driver, a 45-year-old man, was uninjured and taken to Fairfield Hospital for mandatory testing.

NSW Police said a crime scene has been established and an investigation into the incident has begun.

Anyone with dashcam footage, CCTV, or information about the incident to contact police.