Top-Notch Diagnostics and Emissions Repair Services

Precise Auto Diagnostic Services

Today's vehicles are highly complex; it takes a highly skilled mechanic with advanced level tools to analyze the root cause of the problem. Roy's Auto puts behind the guesswork and will provide you with quality auto diagnostic testing service to determine the exact issue with your vehicle.

This service includes:
  • Diagnostic and troubleshooting
  • Check engine light service
  • Electrical
  • Ignition and more

Failed Emissions Repair Services 

Did your car fail emissions test? We can diagnose and repair your vehicle, so that it can pass emissions testing with flying colors!
Proudly serving the people of Phoenix since 1988.

Contact us to get FREE estimates on our auto diagnostics and emissions repair services.  
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