---
title: "Bay Star Auto INC — Clean Truck Check, Union City, CA"
description: "Bay Star Auto INC in Union City, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, smoke opacity (non-OBD) testing, motorhome testing. Phone…"
url: "https://ctcfinder.com/tester/bay-star-auto-inc-union-city/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Bay Star Auto INC

Clean Truck Check tester in Union City, CA (Alameda County).

> 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.

| Field | Value |
|---|---|
| Location | 1275 Atlantic St, Union City, CA 94587 |
| County | Alameda County |
| Phone | (510) 489-3331 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Bay Star Auto INC can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Cuong Vuong in Union City, about 1 mile away. [See listing](https://ctcfinder.com/tester/cuong-vuong-union-city/).

## Clean Truck Check testers in Alameda County

Bay Star Auto INC is one of 85 testing businesses in Alameda County on CARB's public tester list. 79 of them offer mobile testing and 37 do smoke opacity tests. In Union City itself there are 6 listed businesses, 5 of them mobile.

## 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](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does Bay Star Auto INC 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 [Cuong Vuong](https://ctcfinder.com/tester/cuong-vuong-union-city/) (about 1 mile).

### Can Bay Star Auto INC test a 2012 or older diesel truck?

Yes. Bay Star Auto INC lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does Bay Star Auto INC charge for a Clean Truck Check?

Bay Star Auto INC has not published prices with us; call (510) 489-3331 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](https://ctcfinder.com/guide/cost/).

### Is Bay Star Auto INC a CARB-credentialed tester?

Bay Star Auto INC 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 nearby

- **[Cuong Vuong](https://ctcfinder.com/tester/cuong-vuong-union-city/)** — Union City, CA 94587 — (951) 433-0641 — 1 mi. Services: mobile testing, OBD testing.
- **[Lally Truck &Tire Service INC](https://ctcfinder.com/tester/lally-truck-and-tire-service-inc-union-city/)** — 4600 Horner St, Union City, CA 94587 — (510) 557-1374 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Manjot Mashiana](https://ctcfinder.com/tester/manjot-mashiana-union-city/)** — Union City, CA 94587 — (510) 894-5468 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[SJ Diesel Smog Test](https://ctcfinder.com/tester/sj-diesel-smog-test-union-city/)** — 34625 Arroyo Dr, Union City, CA 94587 — (510) 314-9937 — 1 mi. Services: mobile testing, OBD testing.
- **[Total Multi Services INC](https://ctcfinder.com/tester/total-multi-services-inc-union-city/)** — 1780 Whipple Rd Suite 110, Union City, CA 94587 — (510) 767-7165 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jaswinder Singh](https://ctcfinder.com/tester/jaswinder-singh-hayward/)** — Hayward, CA 94544 — (510) 579-7294 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.