Wow, thank you guys so much for your service. Shout out to Lilly who was very kind and all the…read moreother guys there as well! Thank you!

Love coming here. Crew members are always nice and do a great job. I love driving straight in,…read moregetting to stay in my car the whole time. The whole thing never takes more than 10-15mins. It will be hard for me to go anywhere else in the future to get oil changes.

Wow! I love these people!! amazing service, kind, honest, so so so grateful... thank you!!read more

Horrible!!! Used…read morethem for possibly 5 yrs servicing 4 different cars. They are good at general mechanics. But complex, No!!! Here are 4 situations that made me see new mechanics: 1.) 8 yrs ago, I overheated the engine and cracked the block on my 1984 Landcruiser. They rebuilt the engine, for about $8,000.00. While in the process, Tim claimed the bottom did not need rebuilding. So they closed up the engine. But I was now burning oil. 2 Qts/ 500 miles. They refused to fix the problem. Tim blamed that I told them to not rebuild the bottom end of the engine. (Ask him about it!) 2.) Just last month, Feb 2026, the catalytic converter on my Landcruiser started to fail. They installed that about 6yrs ago, for about $1,200.00. 3.) 2006 V70,Volvo had a small radiator leak. I brought it in each of the 2 times the Low Level light went on. Each time, they could not find the leak. The 3rd time I brought it in was because the radiator blew and the car overheated. I told them to check that I had not cracked the block before repairing the radiator. They repaired the radiator first., about $1,200.00. Then determined the block was cracked. (Rebuild by Swedish Motors was $6,000.00.) 4.) 2009 S80 Volvo. Had them look at this car to see if it was safe to buy, for my 17yr old daughter. The results of their inspection was "it's in great shape". 1 yr later the transmission went. And I found out that this was the one yr Volvo used a Ford impala transmission. No replacement parts, used or rebuilt transmissions were available, per Swedish Motors. I had to scrap the car. When I confronted Tim and Tyler that they should have known this about this model they said that was something I should have known about the car. NOTE: These guys do not deserve those big stickers on their front window that say Toyota and Volvo. Call me .... Dave Longmont, Co 720-745-9460

David the manager has a very bad attitude violent tendencies I noticed it was towards his other…read moreemployees as well as towards a few customer. One older gentleman came in and immediately the manager jumped on him told him he could not work there if he did not have black pants the gentleman explained the situation and the manager insisted that he must be in uniform which I agree fired him and then told him that he quit with aggression mind you .

I don't write reviews ever.... I got my oil changed here…read moreabout two months ago and ever since I've had constantly put 3 quarts of oil in and it seems to keep leaking out. Will just change my own oil from now on...

These guys are extremely proficient at what they do they send me pictures of what the problem is…read morecomplete the description of everything that needs to be done with the price quote they don't proceed until I give them a call and give them the high sign to keep going I really enjoy working with these guys. These guys are really a pleasure to be working on my car

Don't use Stonum Automotive if you value your car and your wallet. I spent about $8000.00 last…read moreApril on major repairs. So far both the new CV joints they replaced have had to be replaced, I am now having to replace the rear struts because either the strut or the installation was faulty. I will not return to Stonum Automotive to fulfill the warranty because I no longer trust their competency or their honesty. Several things make me wonder about their competency and/or honesty as when I decided to have another mechanic look at the car, one that has very high ratings, they found some questionable conditions in my car. One of these was a belt for the alternator- excuse my lack of mechanical knowledge, that was the wrong size. It was too small and near breaking. Was this incompetency or more? I don't know. But no matter what I will never go to Stonum automotive again. If I could give them a negative review I would. So far, I am having to pay another $2000 + to fix their incompetency. I had used Stonum for several years and feel my trust was totally betrayed. If I could give a negative review I'd give them a -10.

Love Automotive Authorities. Going into an auto shop as a female has always made me anxious. I…read moredon't know a lot about cars and always feel like they are trying to get me to do stuff that isn't needed. With Automotive Authorities they are extremely detailed when telling you what needs to be done now and what can wait. They operate with Honesty and Integrity. Will definitely be taking my cars here from know on. Cory and his team are AMAZING!!!!

Andy and Dillon provided great customer service, and excellent mechanic work for our 2012 Jeep…read more Thank you, Automotive Authorities!

I'm new to Longmont and took a chance even though this location only had 3 stars. There's a new…read moremanager (Jed) and he was extremely helpful. He and his team were very thorough and explained everything to me. I will be going back!! Had an oil change and brakes replaced

These guys are great at ghosting repairs. $2,800 repair cost. Half the items never were fixed I…read morefound when visiting another mechanic. They also changed my power steering fluid on first visit. After going back because the Idle control motor was still not working correctly, they said my power (still not) steering fluid needed changing, which I did because I forgot they already changed it(maybe), they put the wrong type of fluid. I've also done some research on this place, and the ghosting repairs is fairly common. Considering a lawsuit.

I was visiting a nearby business when I noticed a tire was a bit low. I went to the gas station…read morenext door to air up the tire, but it was clearly losing too much air. So I began to put the spare tire on. With the leaking tire off, but the spare not on yet, the cheap POS jack that Jeep put into the Libertys decided to collapse. My wife goes over to Les Schwab to try and borrow another jack. A guy comes over with a jack and puts the spare on. Takes my Liberty over to the shop to repair the leak. Puts the tire back onto my Jeep and the spare back on the tailgate tire holder. No charge. Saved my day. They now own me, and I am going to tell everyone I know this story. Thanks again guys!

Court, Alan, Richard et al. are great at what they do. Outstanding customer service, fast,…read morereliable, and honest. Not easy to find such qualities these days. This shop has serviced my tire/alignment needs for the past few years, and has always done a great job. They fully stand behind their 60-day satisfaction guarantee, which I know from firsthand experience. I purchased a set of 4 tires for my F-150, drove them for 2500 miles, and realized it just wasn't the right tire. I went back in and told them I wanted a different tire, and that was it. The tire change (with an alignment check) was promptly done the next day. No questions asked. I highly recommend this shop. 10/10.

I visited the Big O Tires on S Main St in Longmont on December 16, 2025, after a frustrating…read moreexperience at the Loveland location and on the strong recommendation of my mechanic, who raved about the great team here. He was absolutely right! I've been prepping my car for winter with various maintenance tasks, including an alignment that my mechanic had done at this Longmont store. The final step was new tires ("new shoes" for the car!). Unfortunately, this location didn't have the ones I wanted in stock, but Loveland did. I purchased and had them installed there--only to discover they were mounted improperly, poorly balanced, and I received little information about the tire or wheel condition before being sent on my way. Frustrated, I called my mechanic, who immediately suggested bringing it to the Longmont store. I spoke with Tyler over the phone--he had an incredibly positive attitude and told me to come in, even as late as an hour before closing (which felt especially generous for a busy shop). There were a few initial hiccups, but the team was genuinely committed to diagnosing and resolving the issue at no charge. They rebalanced the tires, and Tyler showed me firsthand (with photos and video from the balancing machine) that my wheels required an excessive amount of weights--and even then, they were hopping due to severe bends and warping. He honestly explained the wheels were in bad shape, recommended reputable places to buy replacements, and even offered to order them for me. To make up for the earlier frustrations, he promised free installation on the new wheels. I took the car home with properly balanced tires, but the ride was still rough due to those damaged wheels. After some research, I ordered new ones online from a different site. I checked with Tyler about the brand and seller's reputation--he confirmed they were solid. Delivery was lightning-fast (arrived the next day), and I brought them in the following day. Tyler and his team knocked it out quickly: swapped the rims, installed all new hardware, balanced everything perfectly, and had me on my way. They even advised me to return for a free re-torque of the lug nuts (to ensure proper seating) and a balance check after 100 miles or so of driving--which I did, and the car drove smoother than ever. Overall, an outstanding experience at the Longmont Big O Tires on S Main St! Tyler and his crew prioritize doing the job right the first time, take full accountability if something goes wrong, and go above and beyond to make it right. I'll definitely be returning and recommending them to friends and family.

Superb start to a Monday morning, when Bill comes out to great me for my regular oil change on my…read moreToyota 4-Runner! My go-to place for 90% of my car's needs.

My go to mechanic for sure. Can't recommend Mike and his guys enough…read more He has worked on all my cars

I was in Boulder County for work, and I wanted a brake inspection before I drove back home to…read morePhiladelphia. these guys fit me in right away and told me I was fine, at least for the moment, and the foreseeable future. It's a car inspection, they never know what's going to happen as soon as you drive off their lot, I was just looking for an opinion and I got one, along with a handy discussion about the general state of the issues with cars these days. Gas prices are high, pollution is a thing, and alternative methods of getting around for long distances on a regular basis are not as easily available as we would find helpful. I chatted with the owner for a little bit, and if I lived in the area, I would definitely use this business on a regular basis.

When your car has a transmission problem and near Longmont CO, go to Zach's. DON'T GO ANYWHERE…read moreincluding your dealer! Here's my story: My Honda Accord had a transmission leak and I was referred to AAMCO Transmission. After they found the leak and guaranteed the fix, it turned out it's not fixed after a 10 minutes test drive. I went back a week later. They said somewhere else was leaking and only the dealer could fix it. When I asked about the guarantee and wanted my money back, they refused saying they fixed what they found and this is something else. So I went to Frontier Honda. They said it's caused by several seals. It cost me $369.21. After I went home, I found it's leaking again on the other side of the the car where it wasn't leaking before. It leaked even worse. Then, I went back. They checked and said it's caused by the the washers of Benjo Jolt, which is right under the actual leaking spot and was part of the service at AMMCO. It cost me $69.40 to replace two washers. When I got home, it's still leaking. On the 3rd visit, they sprayed some powder on the case and kept the car running for two hours. Then, came back to me saying that the case has cracks. It's not fixable and needs to be replaced by a new one, which costs around $4500.00. I didn't have them fix it because the cost is as much as the value of the car. Recently, when I was selling my car, I was referred to to Zach's for a free diagnoses. This time, they found the true leak spot. They show it to me and I saw the oil coming out from the top of the the case in between the case gasket. When the oil streams down, it could drip down to anywhere which could easily lead a technician to work on any wrong parts. The case has no cracks and it only needs to replace the gasket in the middle. Shops like AAMCO and Frontier Honda truly know how to deal with you so that you're not their problem any more. They're not responsible for their work. If they run a 10 minutes road test, they would have found the problem was not fixed. BIG REMINDER: Always pay with credit car, if you're not satisfied with the service, call your credit car company to dispute the charge. Even you couldn't get the money back, it will increase the fee for the merchant eventually.

Had an excellent experience with Zach's transmission about 9 months ago, just getting to the review…read morenow. My 2016 F150's transmission quickly went haywire (sticking in one gear, refusing to reset gears until I turned the truck off then back on, this would happen about 3x a week) I took it to Ford where they recommended changing transmission fluid ($800 later) and once that didn't work they said it's ~$9.5k for a new transmission. Took it to another "recommended" shop where they said I needed a new transmission, quoted at ~$8k Refused to believe that was the case Zach's came recommended by another shop I called. Spoke directly with Zach on the phone (he's hilarious), took it into his shop and determined it was a solenoid valve issue with was solved for ~$1.7k, which is immensely better than a new $8-9k transmission. His shop's expertise on transmissions allowed him to identify a specific issue instead of lazily (like other shops did) throwing up hands going "you need a whole new transmission". Even after I picked it up & fully paid, he called me back 2 days later because he was losing sleep that he may/may not have tightened like 1 bolt (I brought I back and we were all good after he took a look) - he has pride in his work and wants to do a quality job. It's been 9months later and my transmission is perfect. I recommend them to everyone I speak to, and won't be going anywhere else for my transmission needs.