--- title: "Clean Truck Check Testers in Newark, CA (4 listed)" description: "Find 4 CARB-credentialed Clean Truck Check testers in Newark, Alameda County: 3 offer mobile testing, 1 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/alameda-county/newark/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Newark, CA 4 testing businesses in Newark (Alameda County) are on CARB's public Clean Truck Check tester list (4 credentialed testers). 3 offer mobile testing, 1 do smoke opacity tests, 2 test motorhomes. > CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester. ## Testers in Newark - **[Aman Smog](https://ctcfinder.com/tester/aman-smog-newark/)** — 6240 Market Ave, Newark, CA 94560 — (510) 589-8108. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Highway Tires and Truck/Trailer Repair](https://ctcfinder.com/tester/highway-tires-and-truck-trailer-repair-newark/)** — 6711 Central Ave, Newark, CA 94560 — (510) 602-5340. Services: OBD testing. - **[L & D mobile repair](https://ctcfinder.com/tester/l-and-d-mobile-repair-newark/)** — 38599 Rockrose Ct, Newark, CA 94560 — (209) 321-5293. Services: mobile testing, OBD testing, motorhome testing. - **[L&D Repair](https://ctcfinder.com/tester/l-and-d-repair-newark/)** — 38599 Rockrose Ct, Newark, CA 94560 — (619) 347-4279. Services: mobile testing, OBD testing. ## More testers within 20 miles - **[Auto Mall Smog Test & Repair](https://ctcfinder.com/tester/auto-mall-smog-test-and-repair-fremont/)** — 43026 Christy St, Fremont, CA 94538 — (510) 493-1865 — 4 mi. Services: mobile testing, OBD testing. - **[Continental Truck Repair](https://ctcfinder.com/tester/continental-truck-repair-fremont/)** — Fremont, CA 94538 — (510) 709-7512 — 4 mi. Services: mobile testing, OBD testing. - **[Continental Truck Tire & Trailer Repair](https://ctcfinder.com/tester/continental-truck-tire-and-trailer-repair-fremont/)** — 42400 Boyce Rd, Fremont, CA 94538 — (510) 766-5932 — 4 mi. Services: mobile testing, OBD testing. - **[Fremont Quick Smog](https://ctcfinder.com/tester/fremont-quick-smog-fremont/)** — 43248 Grimmer Blvd, Fremont, CA 94538 — (510) 270-8555 — 4 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Autotek CNG Services](https://ctcfinder.com/tester/autotek-cng-services-fremont/)** — 4299 Peralta Blvd Suite A, Fremont, CA 94536 — (510) 445-3055 — 5 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Dora Lopez](https://ctcfinder.com/tester/dora-lopez-fremont/)** — Fremont, CA 94536 — (650) 208-9960 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Kevin J Hutchins](https://ctcfinder.com/tester/kevin-j-hutchins-fremont/)** — Fremont, CA 94536 — (510) 449-7888 — 5 mi. Services: mobile testing, OBD testing. - **[Longoria Bros Clean Truck Check](https://ctcfinder.com/tester/longoria-bros-clean-truck-check-fremont/)** — 37810 Von Euw Cmn, Fremont, CA 94536 — (510) 712-0483 — 5 mi. Services: mobile testing, OBD testing. - **[MingxuanHu](https://ctcfinder.com/tester/mingxuanhu-fremont/)** — 4837 El Poco Cmn, Fremont, CA 94536 — (909) 569-3922 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Sumanjit Punia](https://ctcfinder.com/tester/sumanjit-punia-fremont/)** — Fremont, CA 94536 — (510) 402-3858 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Yong Hu](https://ctcfinder.com/tester/yong-hu-fremont/)** — Fremont, CA 94536 — (626) 955-9566 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Sunshine Transportation](https://ctcfinder.com/tester/sunshine-transportation-east-palo-alto/)** — East Palo Alto, CA 94303 — (650) 921-0717 — 6 mi. Services: mobile testing, OBD testing, motorhome testing. ## Trucking in Newark Alameda County includes the Port of Oakland and the I-880 industrial corridor (Hayward, San Leandro, Fremont). ## Cost Typical published prices in California: OBD test $50–$135 per vehicle; smoke opacity test $190–$200. Prices are set by each tester. ## Frequently asked questions ### How many Clean Truck Check testers are in Newark? CTC Finder lists 4 testing businesses in Newark from CARB's public tester list (4 credentialed testers), last checked November 1, 2026. Listing on CARB's list is optional, so the real number can be higher. ### Is there mobile Clean Truck Check testing in Newark? Yes. 3 listed businesses in Newark offer mobile testing, which means the tester comes to your yard. Use the Mobile filter above to see them. ### How much does a Clean Truck Check test cost in Newark? Testers set their own prices. Published prices for an OBD test are usually $50–$135 per vehicle; smoke opacity tests for older trucks often cost more, and mobile testers may add a trip fee. See the [cost guide](https://ctcfinder.com/guide/cost/). ### How often does my truck need a Clean Truck Check test? 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](https://ctcfinder.com/guide/deadlines-2026-2027/). ## Nearby cities - [Fremont](https://ctcfinder.com/testers/alameda-county/fremont/) — 12 listings, 4 mi - [Union City](https://ctcfinder.com/testers/alameda-county/union-city/) — 6 listings, 6 mi - [Mountain View](https://ctcfinder.com/testers/santa-clara-county/mountain-view/) — 3 listings, 8 mi - [Santa Clara](https://ctcfinder.com/testers/santa-clara-county/santa-clara/) — 3 listings, 9 mi - [Hayward](https://ctcfinder.com/testers/alameda-county/hayward/) — 18 listings, 10 mi - [Milpitas](https://ctcfinder.com/testers/santa-clara-county/milpitas/) — 3 listings, 10 mi - [Redwood City](https://ctcfinder.com/testers/san-mateo-county/redwood-city/) — 3 listings, 11 mi - [San Lorenzo](https://ctcfinder.com/testers/alameda-county/san-lorenzo/) — 3 listings, 13 mi - [San Jose](https://ctcfinder.com/testers/santa-clara-county/san-jose/) — 41 listings, 16 mi - [San Leandro](https://ctcfinder.com/testers/alameda-county/san-leandro/) — 8 listings, 16 mi