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

8th Street Test Only Southwest Rancho Cucamonga

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In a Nutshell

Experts perform a smog test that adheres to state standards

The Fine Print

Promotional value expires 120 days after purchase. Amount paid never expires. Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. Extra $8.25 fee for California state certification. Extra $15 fee for 1995 models and older. Two-vehicle option must be redeemed same day. Offer not valid for RVs and buses. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

Two Choices:

  • 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.

Customer Reviews

Great staff very helpful and attentive
Lizette C. · June 27, 2017
Very fast & Efficient!
Jeff U. · April 5, 2017
To do your smog their people really nice and professional
Richard S. · March 4, 2017

By purchasing this deal you'll unlock points which can be spent on discounts and rewards. Every 5,000 points can be redeemed for $5 Off your next purchase.