A woman who accidentally caused the death of her eight-year-old daughter in a car crash which triggered her husband's suicide a day later has been spared jail.

Key points: Magistrate said no court penalty could match Tedesco's suffering

Magistrate said no court penalty could match Tedesco's suffering Tedesco lost control of BMW and hit a pole

Tedesco lost control of BMW and hit a pole Daughter died after suffering serious injury

Daughter died after suffering serious injury Girl's father killed himself after witnessing crash

The magistrate said that no penalty the court could impose would match the punishment Joanne Tedesco would suffer for the rest of her life.

Eight-year-old Nicola Tedesco was killed in April last year when her mother lost control of the high-powered BMW she was driving for the first time.

She crashed into a pole at Kidman Park, in Adelaide's western suburbs.

The Adelaide Magistrates Court heard that the car was in sports mode with the traction control switched off and that Tedesco had suddenly accelerated, causing the rear wheels to lose traction.

The court also heard that Tedesco's estranged husband was driving behind her vehicle in a Porsche and saw the crash.

It heard that although Tedesco was estranged from her husband they were on "good terms" and were driving in a convoy to their son's soccer game when the accident happened.

Her husband committed suicide the next day.

Tedesco pleaded guilty to a downgraded charge of aggravated driving without due care.

Magistrate David Whittle described the incident as a "great tragedy" and said there was good reason to suspend the three-month jail sentence he imposed.

"Nothing this court can impose by way of penalty can match the punishment that you have suffered and will continue to suffer every day," Mr Whittle said.

Joanne Tedesco has been given a good behaviour bond for the crash. ( ABC News: Candice Prosser )

'Very brief episode of bad driving'

He also acknowledged the "immense psychological trauma" Tedesco had suffered, knowing that her actions brought her daughter's young life to an end and "drove her estranged husband to suicide".

Mr Whittle said that it was important to send a message to others that even momentary episodes of bad driving could have devastating consequences.

He said that the BMW M5 was "well known for its extreme power" and he did not know why Tedesco had suddenly accelerated.

The court heard that witnesses heard the revving of the engine and that the accounts varied from five seconds of acceleration up to 15 seconds.

"This was a very brief episode of bad driving," Mr Whittle said.

"The impact of what you did cannot be understated."

Tedesco was comforted by family and cried during and after the hearing.

She was placed on a 12-month good behaviour bond and was disqualified from driving for six months.