Great service, he even took me to work before they opened. Would highly recommend them.read more

A year ago I bought a new car a year ago and they called me to schedule a complimentary service and…read moreoil change. I gave them my mileage and scheduled my appointment. Upon arrival, I was told my appointment was a week ago (not when I scheduled it, since today was my day off). Then I was told no, worries, they will get me in and done in 1-2 hours. So I went to the waiting room. Next I was told they can't offer me complimentary services because of my mileage is past the allocated miles on the warranty. Remember I told the person on the phone my mileage. So I left and don't forget plan to return to Auffenberg. This is not the first waste of time after buying 4, yes f-o-u-r cars from them.

I just had my VW Atlas worked on last week at Auffenberg, they were very professional, Larry the…read moreService Director ensured that all was taken care of in a most timely manner. It appears that I will do all my service and repairs there in the future. The quality of service is what one would expect. They did a really great job.

Have been looking for reliable & affordable auto repair services, and I think Karius Automotive in…read moreO'Fallon, IL meets those qualifications. Through a coworker is how I learned of this shop and grateful this happened at the right time. Headlamp assembly repair $1500 GM part, 134,000 miles, factory not necessary. With their assistance ordered part through Amazon delivered to shop. Convenient. Also knew I needed brakes...quoted a price, accepted. Received call, needed back brakes as well. Wasn't much more, already there, took care of that too. All in $1331 for headlight assembly replacement ($300), front & rear brakes & rotors $1631. Only $131 more than factory part price, which excludes install. Dropped off 8am ready by 3pm. Nice! Definitely have found a trustworthy shop.Thank you Karius for exceptional service.

The regulator on my alternator failed and it is internal on my RX350 and can be a challenge to get…read moreto. They were able to get me in quickly, did a great job and it was a very reasonable price. Guess where I will be taking my vehicles in the future.

I received amazing service, they definitely go above and beyond! Everyone was helpful and…read moreknowledgeable

I had a wonderful experience here! All the employees were hard working and did everything I asked…read more When my car came in with issues, they were able to get it in and out in a very timely manor. I appreciate all the hard work this small buisness does for Aviston!

Monken Nissan has been great to work with. The sales department was friendly and enthusiastic,…read moremaking it a very pleasant experience. Had a glitch in my vehicle and contacted service. They were very helpful and was able to get me in quickly and were able to fix my issue with no problems. I highly recommend this dealership for any vehicle purchase and service.

Bought a "nice" used vehicle with relatively low miles from them and have had nothing but…read moreelectrical and mechanical issues since. Have only had the vehicle a few months. Repairs have already cost upwards of 40% of what I bought it for ($18k). Nice folks, but be cautious of the product.

They have always been very accurate with their assessment and estimate on whatever service we need…read more It has been easy to get our vehicles in for service and they have gotten the work done in a reasonable amount of time. Their cost has been fair and they stand behind the work they do.

Oil change. Though they checked everything and are going to work on my brakes…read more I recommend them to everyone. I appreciate the fast and efficient service. They explained everything and helped.

I had a great experiences and test drive with John Weilmuenster..would definitely recommendread more

First off, Sales dept is great! Service dept not so much. A number of years ago we took our car…read morebecause the air-conditioning wasn't working. It took three different appointments to figure that out our problem. Next we had a fluid leak It took three appointments to locate and fix the problem. On the second appointment, they changed out the radiator, which probably wasn't bad. Then I had an electrical problem with my truck took it in twice. They couldn't figure it out so I went somewhere else. Recently we took our car in for an oil leak. It took them two days to figure out what was leaking...some oil valve. They changed it, we drive it home and the low oil pressure light cane on, We were down 2 quarts of oil; one would think that if you're doing something about an oil leak , you would check the oil before you give it back to the customer.

Disappointed Two-Time Buyer - Radio Silent Until Threatened with a Return…read more I am a returning customer who previously had a great experience with Auffenberg, but their post-sale communication has completely deteriorated. I recently purchased a used 2015 Toyota Highlander. Within my contractually guaranteed 7-day return window, an independent multi-point inspection revealed a failing alternator, a bad battery an alignment issue. I contacted my sales consultant, Joshua, immediately to see if management would utilize their internal service department to address these electrical components to save the transaction. The dealership completely ignored my messages for days, hoping the clock would run out on my 7-day return policy. Only after I explicitly stated I was preparing to return the vehicle did I finally get a response. The used car manager's solution? They completely ignored the failing alternator and alignment issues, and offered the "goodwill gesture" of selling me a replacement battery at their cost. Shifting the financial burden onto a loyal repeat customer for a failing charging system during a trial window is an insulting way to do business. I declined their offer, kept the vehicle because the core engine is solid, and will be paying my local mechanic to fix it. They have officially lost a loyal customer's future business.

Purchased a 2025 Kia K4 in November 2024. Our car was totaled and then paid off December 2025. My…read morehusband and I regrettably went back to Kia Auffenberg under a time crunch to repurchase a new vehicle. Auffenberg refused to honor the price we paid November 2024 for the exact same vehicle, 1 year 2 months later. Mind you, this would be the 3 vehicles previously purchased from them, and zero care or consideration given. Not to mention, Steve- working at Kia, is the most unprofessional and rude sales person there. I would recommend working with someone else entirely if you even attempt car shopping. He doesn't air out after chain smoking outside, and he will call you stupid if he doesn't understand what you're talking about. He is not professional, and I would be embarrassed to have Steve work for any business of mine. Just because he can sell you a car doesn't mean it's worth the reputation Auffenberg is creating with people like Steve. With that all said, three separate and equally awful experiences with Auffenberg in 2023, 2024, and again January 2026. We learned our lesson - do not buy there or you'll be met with predatory practices. We were literally discouraged to leave a review unless it was good because it only directly affects the sales people who worked with us. Steve needs to be fired, and Auffenberg should really have better business practices. I hope our next brand new car purchasing experience is better than what Auffenberg failed to provide on three separate occasions. Our community deserves better!