The under-hood emissions label (VECI): what each line means and when it matters

Open the hood of almost any car sold in the U.S. and you will find a sticker headed Vehicle Emission Control Information, the VECI label. It is the manufacturer’s statement that this vehicle, as built, was certified to a specific set of emissions rules. It is not a test result. It does not change after the car leaves the factory, which makes it useful when you need to know what a car was built to meet.

Where to look

EPA says light-duty cars and trucks carry the label under the hood or in the engine compartment. Motorcycles have it in an accessible spot such as under the seat, on the frame or in the glove compartment. Heavy-duty engines carry it on the engine block. EPA label locations. The federal rule requires a permanent, legible label in a readily visible spot, fixed so it cannot be removed without being destroyed. It may not go on parts that are easily detached. EPA labeling rule.

What it must say

For current light-duty vehicles, the regulation requires these items, in block English lettering:

• The heading “Vehicle Emission Control Information”.
• The manufacturer’s full corporate name and trademark.
• Engine displacement, the test group identifier and the evaporative/refueling family identifier.
• An unconditional statement that the vehicle complies with that model year’s EPA rules for its class.
• The exhaust standards (or family emission limit, FEL) the test group is certified to, or EPA’s standardized test-group name instead.
• For vehicles certified for fuels other than gasoline or diesel: “This vehicle is certified to operate on [fuel].”

Required content.

Older labels look different. EPA’s site shows example layouts from before and after 2007, so do not expect every car to match one template. EPA examples. Some labels list emissions equipment or tune-up specifications. The rule allows makers to add information useful for operation and maintenance. Optional information.

The California line

The same paragraph lets the maker state that the vehicle also meets state emission standards. This is where “conforms to California regulations” or 50-state wording appears. Optional information. That line matters to buyers who bring a car into California, because BAR says the first-registration Smog Check confirms the vehicle meets California emissions standards. BAR first registration.

How California’s verification form uses it

California’s Verification of Vehicle form (REG 31) has a section 9 for what the “Emission Label Indicates.” The verifier checks one of three boxes: US EPA standards only, US EPA and California standards, or California standards only. There are also boxes for off-highway vehicles, exempt former military vehicles and “None.” The verifier copies the test group or engine family number into a dedicated field. The section applies to vehicles from the 1968 model year on, motorcycles from 1978, heavy-duty vehicles from 1979 and off-highway vehicles from 2003. REG 31 section 9. A checked box records what the verifier saw. It does not create an exemption or guarantee the car can be registered.

What it is not

• Not a smog certificate. That is a later inspection result the station sends to DMV, valid for 90 days. BAR
• Not the safety certification label. REG 31 records the federal safety label separately, in section 6. REG 31
• Not the window sticker. The fuel-economy label on a new car estimates energy use; the VECI states certification.

If the label is missing, painted over or unreadable, do not guess the certification from the model badge or engine size. Ask the agency handling the inspection or registration what it will accept, and get the vehicle-specific information from the manufacturer.