About Quantum Auto Sales
Driven by Trust. Powered by Experience.
At Quantum Auto Sales, we’re more than just a used car dealership—we’re your local automotive partner committed to honesty, quality, and customer satisfaction. With convenient locations in Garden Grove, Santa Ana, and Escondido, we've proudly served the Southern California community for years by helping thousands of drivers find dependable, affordable vehicles they can trust.
Our Legacy of Quality
From day one, we’ve built our business on a foundation of transparency, integrity, and quality. Every vehicle on our lot is hand-selected, thoroughly inspected, and maintained to meet high standards—because we wouldn’t sell a car we wouldn’t drive ourselves.
Inventory That Fits Every Lifestyle
Whether you’re looking for a fuel-efficient sedan, a family-ready SUV, a hardworking truck, or an eco-friendly hybrid or EV, our diverse inventory offers something for everyone. No matter your budget or needs, we’re here to help you find the right vehicle at the right price.
Customer-Centered, Every Step of the Way
What sets Quantum apart? Our people. Our experienced and friendly team is dedicated to making your buying experience easy and enjoyable—from your first test drive to your final paperwork. We offer flexible financing options, a no-pressure sales approach, and helpful guidance so you can buy with confidence.
Explore our inventory
Visit one of our used car dealerships conveniently located in Garden Grove, CA, Santa Ana, CA, & Escondido, CA: Near Irvine, Oceanside, and Anaheim.
Quantum Auto Sales - Garden Grove
Street address:
13831 Harbor Boulevard
Garden Grove, CA 92843
Phone:
| Day | Sales Hours |
|---|---|
| Monday | 9:00 AM - 9:00 PM |
| Tuesday | 9:00 AM - 9:00 PM |
| Wednesday | 9:00 AM - 9:00 PM |
| Thursday | 9:00 AM - 9:00 PM |
| Friday | 9:00 AM - 9:00 PM |
| Saturday | 9:00 AM - 9:00 PM |
| Sunday | 10:00 AM - 8:00 PM |