Image: Twitter/Natasha Squarey

Dozens of firefighters have tackled an enormous blaze at a wrecking yard in Sydney’s west.

The fire broke out at the business in St Marys at about 2am.

40 cars were destroyed but crews managed to stop the inferno spreading to another 60 vehicles.

More than 40 cars have gone up in flames after a fire broke out at this #StMarys wrecking yard early this morning. Firefighters managed to stop the blaze spreading to neighbouring businesses. @7NewsSydney pic.twitter.com/fuuS54vmBZ

— Natasha Squarey (@NatashaSquarey) March 6, 2019

Fire and Rescue Superintendent Adam Dewberry says the blaze was extremely intense.

“As a car fire, it is a very intense fire due to some of the fuels and oils and plastics and rubbers involved.”

Nobody was injured and an investigation is now underway.

See the footage of the blaze below