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Smog Check & Emissions Testing Stations in O'Fallon, MO

5 of the 55 auto repair shops we list in O'Fallon have smog checks or emissions tests.

Not every repair shop is licensed to test emissions, and a map search for a smog check mixes test stations with parts stores and dealerships. Every station here names smog checks or emissions testing in its business name, its listing category or on its own website.

  1. One Stop Tire and Auto

    71 Elaine Dr, O'Fallon, MO 63366

    Mon–Fri 7:30am–5:00pm, Sat–Sun closed

    Smog & emissionsA/C repair
    Call Website Directions

  2. O'Fallon Garage

    203 S Main St, O'Fallon, MO 63366

    Smog & emissionsState inspectionTowing
    Call Website Directions

  3. One Stop Tire & Auto

    9390 Veterans Memorial Pkwy, O'Fallon, MO 63366-7534

    Mon–Fri 7:30am–5:00pm, Sat–Sun closed

    Smog & emissionsA/C repair
    Call Website Directions

  4. Len's Auto Repair

    909 N Main St, O'Fallon, MO 63366

    Smog & emissionsState inspectionTransmission repairA/C repair
    Call Website Directions

  5. Travers Premier Auto & Tire Service

    1100 W Terra Ln, O'Fallon, MO 63366

    Smog & emissionsFinancing
    Call Website Directions
Bring your registration renewal notice. States that require emissions testing usually print the type of test on it. In California, a notice that says “STAR station required” means only a STAR-certified station can do the check, and test-only stations check cars but do not repair them.

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Smog Check & Emissions Testing Stations near O'Fallon

Good to know

How much does a smog check cost?

Prices depend on the state and the station. In California a smog check usually costs about $30–70 plus the state certificate fee; in states that run their own emissions programs the fee is often a flat amount set by the state.

What happens if my car fails the emissions test?

You get a report with the reason for the failure, and the car needs repairs before a retest. Many states give a free or discounted retest within a set number of days, and some offer repair assistance or waivers when repair costs pass a limit.