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Smog Check Form

This smog check form can be used by smog technicians to report the measured vehicle emissions and register if they are within tolerable levels according to regulations. Register measured Hydrocarbons (HC), Carbon Monoxide (CO), and Oxides of Nitrogen (NOx) to decide if the vehicle passed or failed the smog check.

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Smog Check Form

Smog Check

General Information

VIN number:
License plate number:
Exhaust configuration, when indicated (single or dual):
Vehicle model designation:
Vehicle make:
Body type:
Certification type:
Transmission type:
BAR referee label number:
Fuel type:
Number of cylinders:
Engine size:
Engine make:
Engine year
Attach a photo of vehicle:

Exhaust Emission Test Result

Hydrocarbons in ppm (HC):
Oxides of nitrogen in ppm (NOx):
Carbon monoxide percentage (CO):


Name and signature of technician:
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What You Need to Know About a Smog Check Form: A Comprehensive Guide

A smog check form is a document that provides proof of a vehicle's compliance with emissions standards. In many states, including California, a smog check is required before a vehicle can be registered or sold.

The form includes important information such as the vehicle's make, model, and year, as well as its VIN (vehicle identification number) and license plate number. It also includes the results of the smog check, including the levels of pollutants emitted by the vehicle.

If your vehicle fails the smog check, you may need to make repairs to bring it up to compliance. Once the necessary repairs have been made, you can have the vehicle retested and obtain a new smog check form.

It's important to keep your smog check form in a safe place, as it may be required for future registration or sale of the vehicle. Additionally, make sure to bring the form with you when renewing your vehicle's registration.

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