A fearless California mother punched a hole in the back windshield of a burglar's car after a group of thieves stole her son's piggy bank.

Kiara Ortiz was pulling up to her Torrance home when her son asked her who the men were who were coming out of the residence on July 26 around 2pm.

'When I looked over, I saw one of them with my kid's piggy bank,' she told ABC 7.

The fearless mom didn't wait to jump into action as she took off after the burglars on foot, recording them as she went.

They fled to a green BMW that had a getaway driver inside, police said.