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A1 Performance Auto Repair is a Sunnyvale-based general repair shop that specializes in emissions work (smog testing, certification and smog-related repairs), computer diagnostics and electronics systems. The company’s services range from engine and transmission work to brakes, power steering and fuel injection systems. It also does minor mechanical work, oil changes, routine maintenance, and front and back end repairs (excluding front end alignments).
Cliff Do established A1 Performance Auto Repair in 2000. Mr. Do has many years of experience as an auto mechanic, and he says he’s proud to be at the helm of an entirely family-owned and operated business. He stays aware of industry trends and continually educates himself to remain current with new technological advancements.
A1 Performance Auto Repair services all vehicle makes and models, and it only uses original equipment replacement parts, which, along with labor, are backed by a 12-month/12,000-mile guarantee.
Rated Highest in Quality and Helpful Expertise PERFORMANCEGUARANTEED
Company Credentials
- Liability Insurance
- Business Practices
- Current Complaint File
- Workers Compensation
- License Verification
Diamond Certified Company Report SUMMARY UPDATE October 2025
Quick Summary
- Diamond Certified since 2004
- Provides maintenance, repair and emissions services for all types of vehicles at its Sunnyvale facility
- Exclusively uses original equipment manufacturer (OEM) parts
- ASE Master Technician on staff
Top News Updated
COMPANY MILESTONES
A1 Performance Auto Repair is celebrating its 25th anniversary in 2025.
SPECIAL PROMOTIONS
To commemorate its 25th anniversary, A1 Performance Auto Repair is offering its customers a chance to win a $200 Amazon gift card. The company is choosing one winner every month through December 2025.
Top Survey Responses
From a recent Diamond Certified Survey Response: “Cliff [Do, owner] is trustworthy [and] reliable. He answers any questions [that I have] and immediately takes care of any issues. I’ve never had any problems [and] I’ve been there multiple times.”
From a recent Diamond Certified Survey Response: “I’ve been going there for about three years now. They’re trustworthy and thorough, and they do excellent work. Cliff Do runs a very organized, efficient and clean shop.”
Blogs & Articles
A1 Performance Auto Repair recently published a new blog on its website titled, “Ford F-150 Engine Power Loss.”
A1 Performance Auto Repair
Diamond Certified Video Reports on A1 Performance Auto Repair
A1 Performance Auto Repair - Diamond Certified Video Profile
Diamond Certified Researched Articles on A1 Performance Auto Repair
An A1 Performance Auto Repair technician works on a customer’s car.
Diamond Certified Researched Capabilities on A1 Performance Auto Repair
Service Area
Main Services
- Auto Electrical Repair
- Auto Repair
- Brake Repair
- Car Ac Repair
- Car Alignment
- Car Battery Replacement
- Diesel Repair
- Muffler Repair
- Smog Checks
- Tire Repair
- Transmission Repair
- Vehicle Maintenance
Additional Services
Company Info
Hours
Contact
Capabilities Table
Company Name
A1 Performance Auto RepairManagers
Years in Industry
29 (Manager)# of Employees
4License
209667Memberships
Better Business BureauFounded
2000Payment Accepted
Key Factors
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Diamond Certified Expert Contributor Advice & Tips
Cliff Do is a veteran of the auto repair industry and owner of A1 Performance Auto Repair, a Diamond Certified company since 2004. He can be reached at (408) 827-8949 or by email.
Cliff Do: A Dynamic Development
By James Florence, Diamond Certified Resource Reporter
SUNNYVALE – Cliff Do’s career as an auto repair professional started small, but it developed gradually as he worked his way up from the basics to the big leagues. “I’ve loved auto repair since I was a kid,” he says. “As a teenager, I worked on motorcycles and scooter bikes, and from there I moved to diesel and gasoline engines. I was never satisfied doing just one thing; rather, I wanted to learn how to work on all types of cars, from dom...
A1 Performance Auto Repair Website and External Feeds
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A1 Performance Auto Repair Ratings and Survey Responses (reviews)
Rated Highest in Quality and Helpful Expertise PERFORMANCEGUARANTEED
