CNG Fuel System Inspection Requirements

Inspection Intervals Defined by Code:  3 Years/36,000 miles/After Any Fire/After Any Accident

• Federal Motor Vehicle Safety Standards (FMVSS) Standard 304 requires  that CNG cylinders be inspected every three years or 36,000 miles,  whichever comes first, or after any accident or fire.
• ANSI NGV-2 also requires CNG cylinders to be visually inspected at least every three years or 36,000 miles.
• Manufacturers may have inspection intervals that are more frequent.