Sundborgs Repair Service

Clean Truck Check tester in Sonora, CA (Tuolumne County).

Sundborgs Repair Service appears on CARB's public list of credentialed Clean Truck Check testers. It lists OBD testing, smoke opacity (non-OBD) testing, motorhome testing.

Location
18320 Wards Ferry Rd, Sonora, CA 95370
County
Tuolumne County
Phone
(209) 768-7635
Mobile testing
No (test at the shop)
OBD testing
Yes
Smoke opacity (non-OBD)
Yes
Motorhomes
Yes
Credentialed testers
1
Last verified

Call (209) 768-7635 Open in Google Maps

Before you call

  • Have your VIN, odometer reading and plate number ready.
  • Your vehicle must be registered in CTC-VIS and the annual compliance fee paid; the tester submits the result to CARB.
  • Ask for the price per vehicle. Typical published prices for an OBD test are $50–$135 per vehicle (see cost guide).

Which trucks Sundborgs Repair Service can test

The test CARB requires depends on the engine's fuel and model year. Based on the services Sundborgs Repair Service lists on CARB's tester list:

Your vehicleTest requiredThis tester
Diesel, model year 2013 or newerOBD scanYes
Alternative fuel (natural gas, propane), 2018 or newerOBD scanYes
Diesel, model year 2012 or older (no OBD)Smoke opacity test (SAE J1667) plus visual inspectionYes
California-registered motorhomeSame test as above by engine year, once a yearYes

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Auto Tech and Tires in Sonora, about 1 mile away. See listing.

Clean Truck Check testers in Tuolumne County

Sundborgs Repair Service is one of 5 testing businesses in Tuolumne County on CARB's public tester list. 4 of them offer mobile testing and 1 do smoke opacity tests. In Sonora itself there are 5 listed businesses, 4 of them mobile. All testers in Tuolumne County.

When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the deadline guide. You can test up to 90 days before a deadline. Get a free email reminder before each one.

How to check a tester's credential

CARB publishes its Clean Truck Check tester list, where Sundborgs Repair Service appears as of November 1, 2026. Listing there is optional, so a missing name does not always mean a tester is not credentialed. After the test, check that the passing result shows for your vehicle in CTC-VIS; that is what counts for compliance.

Frequently asked questions

Does Sundborgs Repair Service offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is Auto Tech and Tires (about 1 mile).

Can Sundborgs Repair Service test a 2012 or older diesel truck?

Yes. Sundborgs Repair Service lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See OBD vs smoke opacity.

How much does Sundborgs Repair Service charge for a Clean Truck Check?

Sundborgs Repair Service has not published prices with us; call (209) 768-7635 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the cost guide.

Is Sundborgs Repair Service a CARB-credentialed tester?

Sundborgs Repair Service appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

Other testers near Sonora

Source: CARB's public Clean Truck Check tester list, last checked . Listing on CARB's list is optional for testers, so some credentialed testers are not shown. Services, hours and prices change; please confirm with the tester before you go. Something wrong? Send a correction.

Call (209) 768-7635