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Smogster is a top merchant due to its average rating of 4.5 stars or higher based on a minimum of 400 ratings.


6928 Reseda Boulevard Unit B, Los Angeles

Emissions and Smog Test for One Car at Smogster (Up to 50% Off). Two Options Available.

Select Option
Extra 20% off, up to $1,000
Promo Code SAVE. Ends 7/25.
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Professional technicians administer state-required emissions and smog tests to ensure vehicles fit within regulations

Customer Reviews

100% Verified Reviews
All reviews are from people who have redeemed deals with this merchant.
16 ratings3 reviews
July 17, 2021
It was quick and fast. He was able to accommodate me even though without a same day appt. I thank you very much for the awesome Custer service!!!
Susietop reviewer
18 ratings10 reviews
July 8, 2021
Great service! Fast and friendly. They make getting a smog check so easy. I was in and out in 10 minutes.
Gildatop reviewer helpful reviewer
43 ratings34 reviews
July 8, 2021
So quick and simple!! I will definitely be back next year!
1 ratings1 reviews
June 29, 2021
Great service
Judytop reviewer
14 ratings12 reviews
June 22, 2021
Friendly & fast service also very easy to make an appointment so not much of a wait at all.
1 ratings1 reviews
June 20, 2021
2 ratings1 reviews
June 20, 2021
Guy there was Awesome / 15 min in/out
1 ratings1 reviews
June 18, 2021
Kind, courteous, and fast.
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About This Deal

  • Additional fees apply for certificate and electronic transfer.

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. Appointment required, same day appointments accepted. Additional $8.25 fee applies for certificate and $5 for electronic transfer. Limit 4 per person. May be repurchased every 365 days. Limit 1 per visit. Must use promotional value in 1 visit(s). Valid only for option purchased. All goods or services must be used by the same person. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

About Smogster