My experience with this place was beyond Amazing. I came in to see a vehicle they had that i was interested in. I was pre-approved an all ,but still felt like i needed time to think about it, they were very helpful and understanding, and let me come back when i was 100% sure. They answered all my questions, explained everything i asked thoroughly. I had Freddy the Service Manager and Salesman man George assist me, they were great. Even three weeks after my purchase i had questions about my vehicle and contacted them they were easy to reach. I would definitely recommend to my friends and family. read more

Here's the story I got a Mini Cooper s from this place. I drove it home on the freeway and the car was shaking. They put tires on it the same problem. I then took my car to Mini Cooper. They said that my back right rim is bent and that's why it's shaking. Also my hood manifold is coming apart.Quantum denied there part in selling me a broken car. The reason I'm writing this is because I want to worn car buyers this place is a scam and are selling broke Automobiles for profit. Jose Finace manager will tell you anything for sale and will not call you back and work with you don't work with him. Mike my salesman will do anything for a sale and says your in good hands but cussed me out on the phone and was of horrible assistance. The maintenance team knew about my bent rim and decided to let me drive off knowing my safety was at risk. The reason I'm writing this is because I'm warning other buyers of this and the horrible place this is. Please take your needs elsewhere this place is the biggest scam and better business bureau now has a case against this place. read more

The phobia of being a first time buyer had me doub for a second. As soon as i step in Quantum auto sales in ,Escondido California the hospitality that they provide, made my phobia disappear in seconds. Big shout out to Gerardo,Jerry el chilo and Eddie. Im really satisfied with the deal they gave me. Definately my number one choice in North County l. read more

Thank you George, Nica, and Edgar for all the tremendous help I truly believe that this place is amazing. They help everyone that steps into the door with numerous ways to help . I highly recommend this place for anyone who is looking to buy a car. EVERYONE COME !!!!! read more

This place is amazing and the guy who helped me was awesome!! Christian was awesome and was really great at helping me find a vehicle to leave with when I needed one desperately!! The teamwork is amazing and I am really glad I did business with Quantum! read more

I've been in search of a new car. Going from car lot to car lot. It was when I stumbled upon Quantum Auto Sales. I met Mike and he immediately showed me sum love. My credit was not up to average and I still left with the car I wanted. Great customer service, Quantum treated me like family not to mention the free tacos. I encourage anyone who is currently looking for a car to come on into Quantum Auto Sales and finally get the car they've been looking for. Don't forget to mention Mike and Jorge. Much love read more

I bought my car here and the best salesman I've ever dealt with was El Gordo. Highly recommended Quantum in Santa Ana, CA. On Harbor Blvd. he helped me when other dealerships wouldn't. Gracias Gordo por todo. read more

Purchased a car here BIG misake in less then 3months the car started over heating and had to replace the head gasket now I'm stuck paying the monthly payments +the work that needs to be done I'm only hoping nothing else happens I encourage everyone to stay away and don't buy their lemons!!!! read more

Honestly man fuck this place, at first i was happy with the vehicle i got from them, yet their serivice is trash, been waiting 2 months to recieve my license plates, and the staff is disrespectfull. Don waste your time or money with this people. read more

Worst experience ever here ! These guys are full of Sh*T all of them !! Sales guy was "Gus " I bought a car that I had to replace the battery the next day !! It was leaking battery acid and was expired ! Then the AC went out completely. They kept telling me I can take it in but i would have to leave it over night and I would have to find my own ride to and from this place (more days off work I had to miss) (UNPAID) ! Finally I take it in to get checked/fixed when I went back the next day I noticed it driving weird like it didn't wanna switch gears . Then next day I get pulled over because the tail lights don't work !! Ugh I'm so upset ! They tried to fix the ongoing issues and problems i was having with this vehicle so they convinced me to Take down my previous review. They offered me a "free oil change" lol these people here are a joke!! Its been about 5 months since I've had the car and from day 1 it's been giving me problems. From a bad battery which left me stranded and it was on a Sunday so there mechanics don't work those days I had to buy a battery out of my own pocket, the tail lights needed re wiring for them to work, then AC not working, and I lived in corona at that time !! It was a black car ! You can imagine how hot and frustrated I was. All they do is bullshit you an give you the run around. Now I am stuck with this vehicle (which is far from being paid off) and the TRANSMISSION JUST WENT OUT ! It's going to cost $3,802.85 to get it replaced. The car is not even Worth that much ! I am beyond pissed ! I HOPE this doesn't happen to anyone else (even though I'm sure it already has ) BEWARE BEFORE PURCHASING ANYTHING FRM THIS PLACE! FYI They have multiple locations in Harbor in Santa Ana / Garden grove. read more

DO NOT COME HERE UNLESS YOU WANT TO GET RIPPED OFF. They sell lemons here 100%. The engine in my car blew out in less than 1 month! And they will not take responsibility! I wish I would've read all the reviews first. So sad and 4,000$ out of my pocket just to fix the engine in my car. read more

First bad review I had to make, my husband purchased a car from this place it was a piece of shit car it worked fine for a whole week and then the car started having all these problems everyone that works there knows that the manager really doesn't like to keep his customers/buyers happy! We got into it with the manager he has a shitty attitude! He's Not helpful ! we ended up returning them that piece of crap car! Don't buy cars from this place most of these cars are used!! Wished we could of known that we wouldn't of put $1,500 for down payment !! Fuck the manager!! I hope karma bites him in the ass I read so many bad reviews on Facebook he likes to fuck people over!! I hope they end up closing this place!! read more

I came here today and was helped by Raul . He truly knew what customer service was and went above and beyond in helping me . I would recommend anyone who needs any type of help to go see him . I'm sure he would gladly help anyone read more

Very highly recommend, very happy with my purchase. They were very helpful and professional,answering all my questions. Thank you Alex and George for all your help. read more

First off I have to say they have the worst customer service ever, DON'T BUY A CAR THERE AND IF YOU DO, READ EVERYTHING VERY CAREFULLY!!! Out of all the people we dealt with the only generous person there was our salesman Steve. He went above and beyond to assist us in every way, he was very helpful with negotiating with the finance company to help us get what we wanted. Now when it comes to dealing with the maintenance dept, Thomas is not friendly and very rude! I noticed there were some issues with my car and called the dealer to advise them of the issues and they scheduled me an appt to take my car in almost 2 wks after I called in. When I called in to make sure they will take me back home if they needed to keep my car Thomas said we don't provide rides. So I had to make another appt which wasn't gonna be til almost another 2 wks and the 30 day "courtesy warranty" as they call it would be expired and per Thomas he said they will look at my car and if parts are needed then we can buy them a their price and they will not charge for labor. I wasn't gonna pay for anything if they should have checked the hole car beforehand and had allowed me to check the car myself. So I asked if there was any way I can take it in before the appt and he said no! So I called Steve and advised him of our issue and he said it would be best to bring the car in and he will provide us with a ride to any place we needed to be. So my husband took the car in today and the mgr Jorge Lopez about getting the car svced, Jorge was very rude and unprofessional with my husband and treated/talked to him with so much disrespect it was horrible. Jorge had stated we owed a down payment of $500 and he was going to keep our car until we paid the money, so my husband told him we didn't owe him $500 and Jorge told him we did and he would have to take the bus or call a taxi to find his way home because he wasn't going to give the car back until we gave it to him. My husband had no idea what he was talking about called me and I looked at our contract and noticed that Jorge had added an extra down payment of $500 that the bank wanted from a previous offer they gave us but we never agreed to it. Jorge took advantage of us being that it was a week day and almost midnight and we had been dealing with the negotiation process for almost 2 hrs already. Jorge told my husband that the finance company told him that he needed to keep the car from us til we paid the amount. I called the fiance company and they told me that they didn't tell Jorge that at all. Being a little sneak Jorge was already, if we owed the money he was talking about why didn't we recv any calls or letters after the date past of the $500 pay stating we owed money so we could have paid it if we did have to pay. I can only assume when asked what dealership we bought our car from and given the name, the finance rep already knew how they do business just by answering OHHH after I told them it was Quantum Auto Sales. So when my husband told Jorge that we didn't want to keep the car anymore and give us the car we traded and the money we but down back, Jorge said well then I will keep the car and put on your credit as a REPO and you will still have to pay the finance company. Not true, the fiance company said the dealership will be liable to pay the loan being that we have no ties to the vehicle anymore once its been given back.. So this is our issue and we are going to seek legal advise!!! So 2 thumbs up for Steve the salesman for being great at assisting us even til today. As for the mgr Jorge Lopez, I hope the owner BASSIL F BOULUS of Quantum Auto Sales Inc reads this and fires you!!!! read more

I wish I could give this place negative stars! They sold me a lemon! I took truck back 3 days after I bought it because it was making a weird noise. They actually wanted me to wait 2 weeks to bring it back in but we were leaving on vacation and needed it fixed now. They kept my truck for 2 days and basically put a bandage on the problem. 1 month later I need my rear differential fixed and it was not cheap. We waited 3 months to get plates. I was told they would be mailed to my house after they said they would pay for registration which was not true. I called a few times asking for my plates and I had to deal with a rude receptionist. I called a fourth time after Christmas and some guy said my plates have been there for a hot minute. No one ever tried calling me! Don't go to this dealership unless you want to buy a money pit. Oh and when I need to use my truck at night I couldn't because it had no head lights. Before we left the lot Jorge Lopez said he would fill the tank which was a lie! All that was in there was a quarter of a tank. This place is ridiculous and they need to be shut down!! read more

I purchased a 2007 Chevy Suburban I dealt with George Lopez he was very rude and unprofessional when we got home we realized that the monitor tire pressure system light had came on a couple of days later a service airbag light came on we called to make an appointment which we got on the 20th of this month but being that this is the only vehicle that we have we called and asked if we had to leave the vehicle all day they said yes that the vehicle would have to stay overnight we then proceeded to ask if there was a loaner vehicle that they can let us use until the next day we were told the loaner vehicle is already being used so pretty much we have a one month warranty which is up on the 29th of this month and are not going to be able to go in to get it serviced on the 20th because we have no other car to get home and come back in. Customer service is terrible. I am a firm believer when people buy things if things need to be fixed you should be more happy to fix them I mean it's a $23,000 loan. I would not refer any of my friends to this dealership for the simple fact that they don't keep their word. Buy the way I live 3 hours away. read more

HORRIBLE SERVICE HERE!!! Everyone should listen to the bad reviews and not come here. They had us waiting for more than two hours and nothing. read more

Typical shady used car dealer. I walked onto the lot and Julio introduces himself. I told him I was interested in a dodge truck on his lot and pointed to it. He starts right off with questions about my credit. And how much I had for a down payment. The truck was locked,so asked if he could get the keys to look inside. But he keeps on insisting that he wants to run my credit. So I told him I wanted to look the truck over first. Then he tells me the keys are locked in a safe that he can't get into right now. This guy has no idea how to treat a potential buyer. That's when I decided to leave. I can smell a con artist a mile away! read more

I'll say this that Mike is a great sales guy and willing to go the extra mile for you...he actually went the extra 50 miles for me as in picking me up and securing a car for me and making sure I was happy with a car I liked and not a car to just get off the lot this guy is more than a sales man trying to meet a quota he is actually a great person out to help you the best he can I was approved like he guaranteed me the price was higher than I liked but I'm happy with my car so far and the great treatment I received and continue to receive. read more

I purchased a Mercedes-Benz a week ago and Ruben was great trying to accommodate us. I mentioned to him I had another Mercedes Benz C class 09 with a lot of problems. The ace didn't work and my grill was missing lights ect. He mentioned that they had great mechanics with experience working with Mercedes Benz. He told me that since I was purchasing another car here that he was going to hook me up. I can honestly say he was so right. Freddy is amazing and honest. He finished the job in a day. I was shocked and amazed. He is the man. My car was a mess and a nightmare . No one would be willing to take on a job like that. He honestly deserves a raise. I was so pleased and satisfied. He is the real deal. I took my car to a place called Hauus of Mercedes prior and that place was a joke. They over charged me and didn't fix the problem. I was very disappointed, but Freddy knows what he is doing. I don't want no one touching my car unless it's him. read more

Just bought a car...it had some issues at first ...I called the dealership and they told me to bring it in...I spoke to Thomas...he hooked me up..the car is running great now... read more

So once I got the vehicle I call 3 days later to get service on the brake pads and the serpentine belt they gave the appointment at 9, Two Week later I go and I get their on time I gave them the keys and I was waiting for almost 2 hours, I ask Raul how long where they gonna take and Raul was like oh they should start Checking the vehicle like at 5-6 afternoon I was like what I have place to be its just the brake pads and the serpentine belt nothing major, So I tell him if I could make an appointment for some other day so I would have a free day and he said no cause I it was already more than a 1000 miles and past 30 days but I was like well you got me the appointment all late an Raul was like I can't do. Otho g about it either you wait or go on so I get my keys and I dipped and before everything happen Jerry el chilo From the quantum Auto Dealer on 417 s harbor said to call Raul and he would make me an Appointment ASAP which was 2 weeks later. This dealer needs to Appreciate more their customers read more