If you’re searching for a smog check or smog test in Costa Mesa, CA, look no further than RallySport Engineering. With decades of combined automotive experience and a reputation for excellence, RallySport Engineering offers reliable, accurate, and efficient smog check services for all makes and models—especially Subaru and performance vehicles.
In the state of California, keeping your vehicle emissions in check is not just about compliance—it’s about contributing to cleaner air and a healthier environment. Whether you’re due for your biennial test, registering a vehicle from out of state, or selling your car, we’re here to make the smog test process simple and stress-free.
What Is a Smog Check?
A smog check is a mandatory emissions inspection required by the California Department of Motor Vehicles (DMV) to ensure that vehicles meet the state’s air quality standards. The program is designed to reduce harmful pollutants released into the atmosphere by identifying vehicles that are emitting excessive emissions.
The smog check involves a combination of the following tests, depending on your vehicle type and model year:
Visual inspection of emission control components
Functional tests (e.g., EGR valve, O2 sensors)
Onboard diagnostic (OBD-II) system scan for modern vehicles
Tailpipe emissions testing for older vehicles
At RallySport Engineering, our certified technicians use advanced testing equipment to ensure a thorough and accurate smog test. We stay updated on all California BAR (Bureau of Automotive Repair) regulations so your vehicle complies with current requirements.
Why Choose RallySport Engineering for Your Smog Check?
1. Expertise in Subaru and Performance Vehicles
While we specialize in Subaru vehicles, our team is equipped to handle a wide range of makes and models. Whether you drive a Subaru WRX, STI, or any other vehicle, we have the knowledge and experience to perform accurate smog checks and ensure your vehicle meets emissions standards.
2. Advanced Diagnostic Tools
We utilize the latest diagnostic equipment to conduct precise smog tests. This technology allows us to quickly identify any issues that may cause your vehicle to fail the emissions test, enabling us to recommend the most effective solutions.
3. Transparent and Honest Service
At RallySport Engineering, we believe in providing honest and transparent service. If your vehicle doesn’t pass the smog check, we’ll explain the reasons clearly and discuss the necessary repairs to bring it into compliance.
Smog Test in Costa Mesa, CA
RallySport Engineering is not your average test-and-repair shop. We combine top-tier customer service, expert diagnostics, and an unmatched passion for vehicle performance—all while ensuring your vehicle stays in legal compliance with California emissions laws.
Here’s why drivers trust us for their smog test in Costa Mesa, CA:
✅ Certified Smog Check Station
We’re fully certified and licensed by the California Bureau of Automotive Repair (BAR) to perform smog inspections and repairs. You can rest assured that our inspections are accurate and meet all regulatory standards.
✅ Experienced Technicians
Our team of ASE-certified and BAR-trained technicians has years of experience performing smog checks on a wide range of vehicles, from daily drivers to high-performance builds. We specialize in Subarus and performance vehicles but are fully equipped to handle all domestic and import brands.
✅ Advanced Diagnostic Tools
We use state-of-the-art diagnostic and testing equipment, ensuring your smog test is both fast and precise. If your car fails, we can pinpoint the issue quickly and recommend solutions to help you pass retesting.
✅ Honest, Transparent Service
Customer satisfaction is our top priority. We’ll never recommend unnecessary repairs or charge for services you don’t need. If your vehicle fails the initial smog check, we’ll guide you through the necessary steps to bring it into compliance.
What If My Vehicle Fails the Smog Check?
Failing a smog check doesn’t have to be a nightmare. RallySport Engineering offers diagnostic and repair services to identify and correct the issue. In most cases, problems like a faulty oxygen sensor, worn-out catalytic converter, or evaporative system leak can be repaired quickly.
Once repairs are completed, we’ll retest your vehicle and submit the passing results to the DMV on your behalf.

Schedule Your Smog Check Today!
Don’t wait until the last minute to get your smog test in Costa Mesa, CA. Whether you’re due for a routine check, bringing in an out-of-state vehicle, or trying to diagnose a check engine light, RallySport Engineering is here to help.
Our expert technicians, fast turnaround times, and honest service make us the top choice for smog checks in Costa Mesa and beyond.
👉 Call now or book online to schedule your smog check with RallySport Engineering—your trusted emissions experts in Costa Mesa, CA.