Wild moment wife crashes car while allegedly chasing her husband's mistress

A woman has been charged after she allegedly pursued her estranged husbands new girlfriend before crashing her car in a wild late-night chase.

Police allege a woman, 37,  driving a black Mercedes SUV was followed by another female, 31, in a black sedan in Sydneys south-west on Monday night.

The Mercedes SUV driver pulled over in Campsie to check a text message.

Her boyfriends ex-wife, Rachel Liu, then allegedly approached the vehicle, attempted to get in and then struck the window.

The girlfriend drove off and was allegedly followed by Lui for 4km and rear-ended the Mercedes multiple times on Hamilton Avenue in Earlwood.

CCTV showed Lius sedan allegedly tailing the Mercedes before she turned and lost control of the vehicle.

CCTV shows Rachel Lius sedan closely following the Mercedes moment before she allegedly rear-ended the vehicle multiple times

Rachel Liu lost control of her sedan and crashed into a sign on a median strip (scene pictured)

Lius sedan then mounted a traffic island and crashed into a sign on a median strip.

She was seen getting out of the wreckage and being assisted by concerned residents who heard the commotion.

Lucky it wasnt earlier in the day because someone could have been killed, one neighbour told 9 News.

The Mercedes driver was uninjured and attended Kogarah Police Station a short time later to report the alleged incident.

Locals claimed Lius estranged husband later attended the scene.

The estranged husband of Ms Liu, Chen Ling Liu (pictured) arrived at the scene of the crash

Liu was treated by paramedics at the scene and taken to St George Hospital for assessment.

She was later arrested and charged with charged with predatory driving and stalk/intimidate intend fear physical harm (domestic).

Liu was refused bail to appear in Sutherland Local Court on Wednesday.

Its understood the pair were married for eight years but recently filed for divorce.