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Smog Test for One or Two Vehicles at Mission Smog Test Only (Up to 59% Off)

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Extra 20% off, up to $50
Promo Code SAVE. Ends 9/20.


Professional smog test control station offers a variety of checks and evaluations of smog emitted by an array of vehicles

Customer Reviews

100% Verified Reviews
All reviews are from people who have redeemed deals with this merchant.
6 ratings4 reviews
September 9, 2021
Fast and friendly service, thank you very much!
6 ratings2 reviews
September 7, 2021
Very friendy and quick service. Would highly recommend to anyone.
1 ratings1 reviews
September 7, 2021
Fast n nice !
3 ratings3 reviews
August 28, 2021
Fastest, easiest place to get your smog test done! Drove up, no appointment needed. Thanks for making my day by NOT having to wait around :)
Tinatop reviewer
45 ratings20 reviews
August 27, 2021
Pleased with the service and Groupon a must ! The smog passed so I was more happy
2 ratings1 reviews
August 21, 2021
Quick and excellent service.
1 ratings1 reviews
August 7, 2021
Real nice price and quick!
8 ratings4 reviews
July 20, 2021
Very nice. Speedy service. Definitely recommend!
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About This Deal

Choice of:

  • Smog Test for One Vehicle
  • Smog Test for Two Vehicles

Catalytic Converters: Keeping Combustion Clean

Cleaner cars make for cleaner air. Learn how catalytic converters help with Groupon’s guide.

A car’s engine is a dirty place, and it produces even dirtier exhaust. Vapors exit the combustion chamber carrying a nasty trio of smog promoters: nitrogen oxides, hydrocarbons, and carbon monoxide. As these pollutants barrel through the exhaust manifold (the set of tubes that feeds exhaust from each cylinder into the exhaust pipe), there’s only one thing standing between them and the innocent air outside: the three-way catalytic converter.

Situated just before the muffler, the converter is home to honeycombed ceramic cores coated with some combination of platinum, rhodium, and palladium—three rare metals that interact with the main components of the pollutants. When exhaust enters, the metals trigger chemical reactions that heat the gasses and rearrange their molecules. Under their influence, nitrogen oxides splinter into pure oxygen and nitrogen, while hydrocarbons and carbon monoxide are oxidized into less-harmful carbon dioxide and simple water. Since their introduction during the 1975 model year, these unseen cleaners have made air more breathable and much tastier: the EPA estimates that cars built today are 98% cleaner than their counterparts from the 1960s.

Fine Print

Promotional value expires 120 days after purchase. Amount paid never expires. May be repurchased every 365 days. Merchant's standard cancellation policy applies (any fees not to exceed voucher price). Limit 3 per person. Limit 1 per visit. Valid only for option purchased. All goods or services must be used by the same person. Extra $8.25 fee for California state certification. Two-vehicle option must be redeemed same day. Offer not valid for RVs and buses. $1.75 DMV fee; additional $10 fee for models 1995 and older. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

About Mission Smog Test Only