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    Sigma Auto Group

    4.5 (23 reviews)
    Closed 10:00 am - 6:30 pm

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    Dat N.

    I was in the market for a used Tesla Model X for $89,888 with 9,809 mileage. I found this and gave them a call to see if it was available. I was told it's still available but the mileage on the vehicle is not as advertised but it's 30k mileage instead. Ok fine, so I assumed the price would be much less since it's 20k different. The guy asked me where did I find the vehicle on so he can adjust the price. I said it was popped up on Facebook marketplace but has no contact number so I looked up sigma and there it was. He then said I need to know where you find so I can give you the price based on that. *why? You posted different prices on different site?. After all he said since the mileage was not as advertised so the price now is $88,888. Are you out of your mind? $1000 off for 20k extra mileage you had it off. He was rude after I told him that I want interest. Don't buy from them.

    Car
    Hamzeh S.

    I'm so speechless about my experience with these amazing people. They helped me to get my dream car. Working with Sigma Auto Group is a dream come true. Peace of mind, confidence, support, and love, that I experienced here.

    Sase S.

    Bruce and Danny were great . They explain the process really well . Buying a car was never easier .

    2015 BMW M4

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    Bruce and team were amazing! They were very knowledgeable and helpful finding the car I wanted and all other details.

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    8 years ago

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    Danny S.

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    Review Highlights - Sigma Auto Group

    I want to thank LuLu and Bruce for working with me very professionally, and getting me the best deal, best interest rate !!!

    Mentioned in 9 reviews

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    Concord Toyota - The car

    Concord Toyota

    (1.1k reviews)

    We started looking for a new car and wanted to see what Toyota had to offer. We were looking for a…read moreRav 4. We visited multiple dealers, but didnt see much or any inventory. There wasn't much interest it seemed because I was looking for a car that was in high demand and not very available. When I arrived at Concord Toyota I was greeted with enthusiasm. Nabi the sales person showed me the Rav 4 and other options. He offered test drives with out being asked. I was looking for the best value for a Rav 4. Nabi and Karsen helped me in locating the right car. They worked with me over multiple days and were always available and returned calls. They were persistent and never gave up. The team got us in a 2026 Rav 4 with all the features we were looking for. Amazing! My wife and I would like to thank Nabi, Karsen, Prob, Nassar & Andy for the great experience and Vibe we received. Much gratitude, the Freitas Family

    I have been a loyal Toyota customer for many years and have purchased at least five Toyota vehicles…read moreover the years. I've also owned more than 10 brand-new cars in the past 27 years from different manufacturers, including Toyota, Lexus, Volvo, Scion, and BMW. My very first brand-new car was a 1999 Toyota Camry that I purchased in Redwood City back in 1999. After all those experiences, I can honestly say that this was the best car-buying experience I've ever had. A huge thank you to Ethan Nguyen, my salesperson. Ethan is a young man, around the same age as my oldest son, and he truly impressed me. He was incredibly patient, professional, knowledgeable, and never once made me feel pressured. He took the time to answer all of my questions, helped me carefully compare different vehicles, and genuinely wanted to make sure I found the right one instead of simply making a sale. What impressed me the most was that you could tell Ethan truly enjoys what he does. His positive attitude, honesty, and dedication made the entire experience enjoyable, smooth, and unforgettable. It's rare to meet a salesperson who is so passionate about helping people. I also want to recognize the young Chinese-speaking gentleman who assisted with my trade-in. He was kind, attentive, and very helpful throughout the process. A special thank you as well to Manager Nasser and Finance Manager Omar. Both were friendly, professional, and made the financing process simple and stress-free. From choosing my vehicle to completing the paperwork, everyone worked together as a team and treated me with respect. There were no pressure tactics, no unnecessary games, and no hidden markups. I especially appreciated the dealership's commitment to transparent pricing with their "No Markup" policy. I ended up purchasing a 2024 Toyota RAV4 LE Hybrid Certified Used Vehicle, and it looks almost brand new. Knowing it comes with Toyota's certified warranty gives me even more confidence in my purchase. If you're looking for a new or certified used vehicle and want an honest, professional, and hassle-free experience, I highly recommend Toyota of Concord. This dealership has earned my trust, and I wouldn't hesitate to recommend them to my family and friends. Thank you again, Ethan Nguyen, Nasser, Omar, the trade-in specialist, and the entire Toyota of Concord team for making this such an outstanding experience. I absolutely love my new RAV4!

    Future Hyundai of Concord - Inside showroom

    Future Hyundai of Concord

    (462 reviews)

    Mauricio was an absolute dream to work with! I was so scared to buy a car by myself but Mauricio…read moremade the process sarmless! No slick talk no preasure just straightforward and honest! I really really appreciated that. I will recomend to everyone Mauricio is your guy. I will definitely be back when I'm ready to trade in for another car!

    Update (1 4) 4/7/26: Issue resolved, but the process revealed areas that need improvement…read more While my initial experience involved multiple visits, ongoing noise concerns, and frustration around inconsistent diagnoses, I do want to acknowledge that the issue has now been resolved. The A/C compressor was ultimately identified as the source of the problem--something that should have been caught earlier given the number of prior inspections. It's also important to note that these issues began following a routine oil change at the dealership, which led to an oil leak involving the oil pan, oil filter, and drain plug. My vehicle had no prior issues before that service, so this was a significant concern. I want to recognize Jaime (Service Advisor) for his consistency, professionalism, and commitment to helping move things forward. I also want to highlight Ali, the lead technician, who ultimately identified and resolved the issue. Additionally, Lisa (Service Manager) kept her word in working to get my vehicle back to the condition it was originally designed to be in. She listened, acknowledged both the issue and my concerns, and made a clear effort to address the situation. That was appreciated. However, I do believe the Service Group Director and Director of Operations could have been more proactive once this situation was escalated, especially with corporate involvement. More direct communication and leadership at that stage would have made a difference. I also want to note that I requested goodwill consideration from Hyundai multiple times throughout this process and have not received any. Given that this issue began in early January and was not fully resolved until the final week of March, after multiple service visits and extended time without my vehicle, I believe goodwill consideration is warranted and should still be evaluated. I am relieved the issue is now resolved, but the process to get there should have been more efficient and consistent from the start. I hope this feedback helps improve both diagnostic accuracy and communication moving forward. I'm sharing this update to reflect both the resolution and the full experience so others have a complete and accurate picture. Update: Picked up my car on 3/18. Thought the issues were fixed. Since picking it up, the issues are still there. They never fixed my car that they messed up after the oil change. I will be reaching out to corporate about this issue at this point. I've been coming here since 2024 and never had any issues with them. However, this past December I got a oil change from them and it messed my car up. While driving my vehicle in February, the oil lamp came on (It means that I need a oil change). I did not understand why because my vehicle was not driven much due to several vacations taken from Dec to that date in Feb. I have a 2023 Sante Fe. Very good on gas and oil. I contacted Hyundai immediately and they had my car towed to them. They diagnosed the issue. They stated that when the outstanding change had been done, the oil pan was not properly placed back on which caused an oil leak. This issue caused then to have my car for 2 or 3 days. They never offered me a loaner nor rental. I had to stay home from work for all those days. Honestly, I did not ask them for one because I did not even know they offered them. I never had to receive either before. Fast forward, my wife begin to notice a rough noise (My car does not make any noises or gave any issues. I have always kept my maintenance up since 2022 when I first purchased it). So when this noise happened, I did not understand why. That noise came on when you automatically started the vehicle, at stop lights and at red lights. It is horrible. This lasted for 2 weeks until I was able to get time off from work. In the 2nd week, the ac/ heat until began to also make noises. This was ridiculous. I finally got off 3/12. Took my car in.. there is a new guy there (Service Advisor) that really listened to my issue and even sat in my car for some time to great what I was hearing. He was very empathic. Jamie (Service Advisor) also showed empathy. She was not happy to hear that there were more issues with my car after the oil change. I explained to get that i needed a vehicle this time around because I had an appointment the next day. They had no loaners, but she got me a rental via Enterprise. Jammie gets 5 stars from me each and every time!

    Sigma Auto Group - car_dealers - Updated September 2026

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