Car and truck emissions cause about 33% of the state's air pollution. Because of this, the Pennsylvania Department of Transportation (PennDOT), in conjunction with the Department of Environmental Protection, have authored a comprehensive emissions inspection program designed to improve the state's air quality.

Top Emission Tests

The state requires a vehicle emission test once a year. So as to alert you when your time is up, the state will stamp on your vehicle's renewal notice the words "Emissions Inspection Required/Diesel Vehicles Exempt."

You can have your vehicle tested at any PennDOT-approved service station, dealership, or neighborhood garage. To stem the inconvenience, the state recommends coordinating the test with your vehicle's annual safety inspection to save time.

The cost for an emissions test varies with each station, so you're encouraged to call ahead to find out the price.

Top If Your Vehicle Fails the Emission Test

Should your vehicle not pass, you must foot the bill for all repair costs needed to bring it into compliance. You then must have it retested before your vehicle's current safety inspection expires. You won't be charged for this second test as long as you return to the same inspection station within 30 days.

If your vehicle fails a second time, you are eligible for a one-year waiver provided you present proof that you spent over $150 on emission repairs. Check with your inspection mechanic to explore your options.

Top Exemptions

The following vehicles are exempt from emission tests:

• Motorcycles

• Registered antiques

• Registered street rods

• Registered collectibles

For more information, call (800) 265-0921.

Top Extensions

Emissions inspections from out of state are not valid in Pennsylvania. If you're out of the state for more than 30 days when your Penn. emissions sticker expires, the state gives you 10 days after your return to get the vehicle inspected. It's a good idea to hang onto your receipts from your trip, to prove your absence during the time period.

Top Waivers

If your vehicle still does not pass emissions after you make more than $150 worth of repairs, a certified emissions inspection station might grant you a one-year waiver. If one necessary repair costs more than $150, you could be required to make it before being considered for a waiver. Waivers will not be issued to vehicles that have been tampered with or modified for emissions purposes.

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