Firefighters responded to reports of a fire at Pedro's Auto Clinic at 1080 Terra Bella Ave. at 3:28 a.m., Mountain View fire spokeswoman Jaime Garrett said.
The fire was quickly extinguished, but three sedans parked behind the business were destroyed, and two other vehicles had minor damage, fire officials said.
No injuries were reported.
The cause of the blaze remains under investigation, but the fire is considered suspicious, Garrett said.
She said any community members who witness suspicious activity should call authorities.
"We always encourage our residents, 'If you see something, say something,'" Garrett said.