An Ashmont woman was awoken from her sleep in the early hours of Monday morning after her car was set alight, police said.
About 2am police responded to the Connorton Street blaze and arrived to a "completely destroyed" car.
A post on a Wagga community Facebook page shows a Holden Commodore ute well alight.
Wagga police duty officer Inspector Peter Robertson said two unidentified youths were seen running from the scene.
It follows a string of car fires in the Wagga area over the past two months.
"It is a concern to us," Inspector Robertson said.
"We don't know whether it's linked, but we will investigate it."
Inspector Robertson said it helped for property owners to make themselves a "small target" for thieves, which included locking doors, keeping valuables in safe storage and parking cars off the street.
"Thieves will always take the easiest avenue."
Anyone with information should contact Crime Stoppers on 1800 333 000 or use the online reporting page.
