Welcome to Diagnostics Unlimited
A trusted name in car care for over 26 years
Quality Service and Competitive Prices
Come see the difference
Conveniently located in the heart of Silicon Valley
Open Mon-Sat right off Central Expressway in Sunnyvale

Quality Auto Service Center Sunnyvale

Diagnostics Unlimited offers Quality Car Care at Wholesale Rates plus a broad range of services designed to suit your specific type of vehicle.
Compare Diagnostics Unlimited to any dealer or other independent repair station and it’s evident that Diagnostics Unlimited delivers the best value package in the auto repair industry with its experienced ASE certified auto repair professionals, latest computerized diagnostics tools, scanners and advanced systems, network of dealers, quality parts providers, loaner cars and local shuttles to suit your immediate needs. As well as superior customer service and a fast service center to uniquely satisfy your car’s repair and routine maintenance service requirements.

Car Maintenance

Whether it’s basic tune up, alignment or oil change, we can perfom your scheduled maintenance items to keep your car in tip top shape.

Vehicle Repair

Clutch slipping? Oil leaking? Bring us your vehicle and we can diagnose, repair and get your car back on the road ASAP!

Pre-Purchase Inspections

Interested in a pre-owned vehicle? Our technicians can inspect your potential new automobile for any hidden safety or mechanical issues before you buy.


All major brands

We service all major automobile brands.  Whether you have a Ford or Ferrari we can take care of you. Our long history with parts suppliers ensures your car will be ready to be back on the road in no time.

Top Rated

Our customers love us because of our fair pricing and quality work.  See our testimonials below and on Google and Yelp!

Easy to work with

Open 6 days a week and conveniently located near 101 in Sunnyvale.  Shuttle service is also available.

  • I have been going here for at least 8 years.  I have had service and repairs, and recommended many people who live in the Sunnyvale and Santa Clara areas.  I have never heard anyone complain about my recommendation.  This is the only place I feel comfortable enough to bring my car and have them evaluate.  I especially love working with Sergie.  Keep up the Good work!

    Barbie Dyelp
  • came here for an oil change. great pricing, friendly owner. one of the better independent shops that ive been to. being how crazy expensive labor is here in the bay area, ill definitely be coming here with regards to my BMW

    William Tyelp
  • I got my alignment, brakes & new tires for a very good deal.  Besides the synthetic oil requirement, Overall services & prices are excellent.  Very friendly.  They earned my trust & i will come back for future services..

    Bill Nyelp
  • These people do a great job! Above and beyond what was expected. They matched price from another location and did a thorough exam of the vehicle - found a very important piece of the car that was missing that other maintenance shops failed to recognize! Thank you guys - really appreciate it!.

    Sirisha Cyelp

Call or stop by, we’d love to see you!

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