Welaco

Clean Truck Check tester in Bakersfield, CA (Kern County).

Welaco appears on CARB's public list of credentialed Clean Truck Check testers. It lists mobile testing. Mobile testing means the tester can come to your yard or job site.

Location
5500 Woodmere Dr, Bakersfield, CA 93313
County
Kern County
Phone
(661) 699-9665
Mobile testing
Yes — comes to your yard
OBD testing
No
Smoke opacity (non-OBD)
No
Motorhomes
No
Credentialed testers
1
Last verified

Call (661) 699-9665 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 and any mobile trip fee. Typical published prices for an OBD test are $50–$135 per vehicle (see cost guide).

Which trucks Welaco can test

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

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

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is DOT mobile inspection services in Bakersfield, about 1 mile away. See listing.

Clean Truck Check testers in Kern County

Welaco is one of 107 testing businesses in Kern County on CARB's public tester list. 89 of them offer mobile testing and 53 do smoke opacity tests. In Bakersfield itself there are 78 listed businesses, 63 of them mobile. All testers in Kern 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 Welaco 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 Welaco offer mobile Clean Truck Check testing?

Yes. Welaco says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

Can Welaco test a 2012 or older diesel truck?

Welaco does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is DOT mobile inspection services (about 1 mile). Trucks from 2013 on get an OBD scan instead.

How much does Welaco charge for a Clean Truck Check?

Welaco has not published prices with us; call (661) 699-9665 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 Welaco a CARB-credentialed tester?

Welaco 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 Bakersfield

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 (661) 699-9665