Our Services

Smog Check/Inspection
Smog Check/Inspection
Smog Repair
Smog Repair
Clean Truck Check
Clean Truck Check
Auto Repairs
Auto Repairs

Auto Repair & Smog Services in San Marcos, CA

Welcome to High Tech Auto & Smog, your trusted smog check station in San Marcos. We specialize in Star Smog Checks, smog inspections, Clean Truck Checks (CTC), and smog repair services—ensuring your vehicle meets California’s emissions standards quickly and efficiently. Whether you’re due for a smog test or need a smog repair to pass inspection, our experienced technicians are here to help.​

As a certified Star Station, we perform smog checks required for DMV renewals, title transfers, out-of-state vehicle registrations, and Clean Truck Checks for heavy-duty vehicles in compliance with CARB regulations. Our advanced diagnostic tools and state-of-the-art equipment allow us to accurately assess your vehicle’s emissions system and complete your smog inspection without unnecessary delays.​

If your vehicle fails the smog test, we also provide expert smog repair services. We’ll identify the issue, recommend the most cost-effective fix, and get you back on the road in compliance with state regulations. Our team is committed to transparency, efficiency, and customer satisfaction from start to finish.​

Conveniently located in San Marcos, High Tech Auto & Smog is the go-to destination for fast, reliable, and affordable smog services. We work with all makes and models, including hybrids, older vehicles, and heavy-duty diesel trucks, and we are fully licensed to provide the necessary certifications for your DMV renewal or Clean Truck Check compliance.​

Stop by today or call to schedule your smog check appointment. At High Tech Auto & Smog, we make emissions compliance easy. Let us help you pass the test the first time!

Smog Check Services

If your vehicle needs a smog inspection for registration, High Tech Auto provides fast and reliable testing to help you complete your renewal without delays.

Our smog services include:

  • California smog inspections
  • Smog checks for DMV registration renewal
  • Pre-smog inspections
  • Smog diagnostics if your vehicle fails
  • Emissions system testing

If your vehicle doesn’t pass the smog inspection, our technicians can diagnose the issue and recommend the repairs needed to help your vehicle pass re-inspection.

Clean Truck Check (Diesel Emissions Testing)

California requires many diesel trucks and commercial vehicles to complete emissions inspections through the Clean Truck Check program.

High Tech Auto helps truck owners understand the process and stay compliant.

We provide:

  • Clean Truck Check inspections
  • Diesel emissions diagnostics
  • Emissions-related repairs
  • Assistance understanding compliance requirements

Our team works to keep your truck legal, compliant, and operating efficiently so you can stay on the road.

Auto Repair & Diagnostics

If your vehicle isn’t running properly or a warning light appears on the dashboard, our technicians can help identify the issue quickly.

Common repair services include:

  • Check engine light diagnostics
  • Engine performance problems
  • Brake repair and brake inspections
  • Battery, starter, and alternator service
  • Cooling system and overheating repairs
  • Suspension and steering repairs
  • Air conditioning and heating service
  • Fluid leak inspections and repairs

We take the time to explain what we find and discuss your options before beginning any repairs.

Repairs for Failed Smog Inspections

If your vehicle fails a smog test, it usually means there is a problem within the emissions system that needs attention.

High Tech Auto regularly helps drivers resolve smog failures caused by:

  • Check engine lights
  • Oxygen sensor problems
  • Catalytic converter issues
  • EVAP system faults
  • Exhaust leaks
  • Ignition system problems

Once the issue is diagnosed and repaired, we help ensure your vehicle is ready for a successful re-inspection.

Preventative Maintenance Services

Regular maintenance is one of the best ways to extend the life of your vehicle and avoid unexpected repairs.

Our maintenance services include:

  • Oil changes
  • Filter replacements
  • Fluid services
  • Battery testing
  • Brake inspections
  • General vehicle inspections

Staying up to date with routine maintenance helps keep your vehicle reliable and performing efficiently.

Why Choose High Tech Auto?

Drivers in San Marcos and North County San Diego choose High Tech Auto because we focus on honest service and quality workmanship.

Customers appreciate:

  • Experienced technicians
  • Clear explanations and honest recommendations
  • Reliable smog and emissions services
  • Service for most makes and models
  • Friendly, local customer care

We believe auto repair should be straightforward and transparent.

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