Guaranteed Auto Service

(510) 858-2490
24 Verified Reviews

8:00am to 6:00pm


23673 Connecticut St
Hayward, CA 94545 USA


  • Gary Goodman, Owner
  • Established 1979
  • 3 Auto Repair Mechanics on Staff
  • 2 ASE Certified Auto Technicians
  • 68 Years of Car Repair Experience

Guaranteed Auto Service Reviews


24 Verified Reviews
5 stars
4 stars
3 stars
2 stars
1 star
by - Verified Customer March 17, 2017

They were very good at explaining what was wrong with the car and how to fix it. They're very affordable.

by - Verified Customer March 15, 2017

It's good. I think just that the price is too high.

by - Verified Customer March 12, 2017

They have real good customer service there. They took care of everything I needed promptly and showed me what it was going to cost. It was good.

by - Verified Customer March 11, 2017

Excellent service and quality results.

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by - Verified Customer March 01, 2017

It was pretty much excellent. I've gone in there twice and I'll likely take my car back in the near future. Everyone is friendly and respectful. I have no problems with my car and the pricing is pretty great also.

by - Verified Customer February 27, 2017

It was just minor tire work. Everything was handled as I expected.

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by - Verified Customer February 23, 2017

I had a good experience.

by - Verified Customer February 20, 2017

They do very good work and I have always been happy with them. I have been using them for over 20 years. I have no complaints I recommend them all the time.

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by - Verified Customer February 06, 2017

It was awesome they were flawless, they were good.

by - Verified Customer February 04, 2017

It was just a smog test. I took a motor home in and one of the hoses was left off of the unit. When I brought it to their attention, they just said 'I don't know. I thought they would be a little more concerned about it. They got my vehicle fixed though.

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by - Verified Customer January 30, 2017

The service was excellent. The concerns that I had were addressed promptly, clearly, and everything was explained clearly. It was all easy to understand. Some of the most painless auto repairs I've ever had.

by - Verified Customer January 27, 2017

I work as a mechanic myself but there are some things I can't do so Gary helps me with the things I can't do. I can't stump him, he is very courteous. I send him customers, family, friends, or anyone I don't have time to fix.

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by - Verified Customer January 25, 2017

I'm not saying that they took them, but tools were taken out of the back of my truck.

by - Verified Customer January 10, 2017

It was good work, but I think it was too expensive.

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by - Verified Customer January 09, 2017

I had them do my brakes. They were quick, got me in the next day, drove me to work while they were working on the car, and they had it done in about four hours. I was completely satisfied with the service. In all reality I'm pretty happy with those guys.

by - Verified Customer January 05, 2017

It was fine, quick, and easy.

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by - Verified Customer January 03, 2017

They fixed my timing chain. The cover was missing a valve and it was leaking oil. We took it back in and identified it and made the repairs at no charge. It was under warranty, but we had to come back and he apologized. He's fixed a number of problems. He was my second or third option and once I brought it to him he corrected what three other mechanics couldn't figure out. They're wonderful.

by - Verified Customer December 29, 2016

It was good. A 10. I'd recommend them to anybody.

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by - Verified Customer December 26, 2016

They took the car and oiled and greased it. They checked a couple of things on the engine. The other one was the van that just got oiled and greased. They did a great job. I do recommend them. They are a good company. Just the sign says it, guaranteed. I'm very pleased with them.

by - Verified Customer December 21, 2016

Good service.

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by - Verified Customer December 20, 2016

It is great. I have been with Guaranteed Auto for 15-20 years. It is the only mechanic that I go to. They are very good and they are very honest.

by - Verified Customer December 14, 2016

I am very satisfied with their work, as always. The fact that they will give you a ride back to your house and pick you back up is a very convenient service. Their staff is very friendly and courteous.

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by - Verified Customer December 03, 2016

I really appreciate that they are there on time. They get it done on time. When I get my car back, it is just as clean as when it got there. I always trust him to do a good job. So far, I haven't been disappointed.

by - Verified Customer November 30, 2016

A plus service.

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RepairPal Scorecard


Guaranteed Auto Service was established back in 1979 and has been proudly serving Hayward and the surrounding area ever since. This RepairPal Certified shop features a very experienced and well-trained team lead by an ASE certified master. They are equipped with the state of the art tools and diagnostic equipment necessary for today's modern vehicles. Repairs performed here can range from minor and major mechanical repairs, to check engine light and computer diagnosis and repairs, to tires and wheel alignment, to state smog inspections, as well as your scheduled maintenance needs. All this work is backed by a 24-month / 24,000-mile warranty for your peace of mind. Our survey of their recent customers revealed a group who describe the team here as “honest”, “wonderful”, “awesome”, “friendly”, and "excellent". A local shuttle service, loaner cars, early bird drop-off, and a waiting area with wireless Internet are also available for your convenience.



  • AC/Heating
  • Alignment
  • Check Engine Light
  • Diagnosis
  • Muffler & Exhaust
  • Oil Change & Lube
  • Scheduled Maintenance
  • Service & Repair
  • Smog/Emissions Testing
  • Timing Belts
  • Transmission Repair
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  • Early Bird Dropoff
  • Rental Car
  • Service Guarantee
  • Shuttle
  • Wireless Internet


  • NAPA


  • Acura
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  • Cadillac
  • Chevrolet
  • Chrysler
  • Dodge
  • FIAT
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  • GMC
  • Geo
  • Honda
  • Hummer
  • Hyundai
  • Infiniti
  • Isuzu
  • Jeep
  • Kia
  • Lexus
  • Lincoln
  • Mazda
  • Mercury
  • Mini
  • Mitsubishi
  • Nissan
  • Oldsmobile
  • Plymouth
  • Pontiac
  • Ram
  • Saab
  • Saturn
  • Scion
  • Smart
  • Subaru
  • Suzuki
  • Toyota
  • Volkswagen
  • Volvo
+ More

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