Licensed mobile CARB testing across the San Joaquin Valley & I-5 corridor. No shop. No overhead. No hidden fees. Just the test, at the right price. Hablamos Español.
Most CARB testers charge $150+ because they have a shop lease, a front desk, a waiting room, and they pass all that overhead to you. We eliminated it. We are mobile-only. No rent. No fluff. No games. We show up, test your truck, hand you the certificate, and charge you $75. Period.
Get Your $75 Test →We did the research. Here is what you are actually paying elsewhere vs. with us.
| Service | Our Price | Market Average | You Save |
|---|---|---|---|
| HD-OBD Testing | $75 | $90 – $150 | Up to $101! |
| Smoke / Opacity Testing | $149 | $180 – $250 | Up to $101! |
| Fleet Rate (5+ vehicles) | $75/ea | $120 – $150/ea | Up to $61/truck! |
| RV / Motorhome (OBD / OVI) | $99 / $199 | $250 – $350 | Up to $251! |
| CARB Registration Setup | $75 | $50 – $100 | Up to $21! |
| Weekend & evening service at no extra charge. Competitors add $25–$75 for after-hours. | |||
The price you see is the price you pay. No hidden fees. No trip charges. No surprises.
Slide to see how much your fleet saves with us vs. the market average.
Fleet managers and owner-operators trust us for the lowest prices and best service.
"Tested 12 trucks at our yard. $75 per OBD test saved us over $1,200 compared to quotes we got."
"Fair price, no upselling. Showed up on time, tested the truck, gave me the certificate. That is how it should work."
"14-truck fleet, Saturday service before our DMV deadline. They handled everything on-site. Prices were unbeatable."
On-board diagnostics scan for heavy-duty diesel vehicles. Required for 2010+ model-year engines under CARB's HD I/M program.
Exhaust opacity measurement for pre-2010 diesel engines. Calibrated equipment meeting all CARB specifications.
Fleets of any size tested at your location. One visit. All vehicles. All paperwork handled. Massive savings.
Diesel RV or motorhome tested right in your driveway or storage lot. No stressful drives to a testing station.
California's Heavy-Duty Inspection & Maintenance program requires biannual CARB compliance testing for all heavy-duty diesel vehicles. If your truck is not tested and compliant, you face fines, registration holds, and being pulled off the road.
Until next CARB reporting deadline
Schedule Your Test Now — From $75 →We drive to you — no extra charge. Serving the I-5 corridor, Port of Stockton, and surrounding communities.
Don't see your city? Call us — we likely cover your area. 209-818-1371
Fill out the form and we will call you back within the hour. Or just call us directly.
Thank you! We will call you back within the hour to confirm your appointment. If you need immediate assistance, call us at 209-818-1371.
Hablamos Español — We speak Spanish too.
Mon–Fri: 6:00 AM – 5:00 PM
Saturday: 8:00 AM – 4:00 PM
Evening appts available
Stockton, Lodi, Tracy, Manteca, Modesto & the entire San Joaquin Valley & I-5 corridor
CARB Tester ID: IF530523
CARB Test Stockton
No shop rent. No front desk staff. No waiting room overhead. We run lean and mobile — and pass 100% of those savings to you. HD-OBD testing at $75 when everyone else charges $90–$150.