Emissions testing service near Downers Grove, IL

Needed a transfer case replaced. They were the only shop that would attempt to see if they could fix / replace due to the car being a 2002. The work took several weeks to complete. Took the car home and found some issues that were overlooked. Took the car back and they fixed the main issue no charge . Had an additional matter that was not initially covered but I worked with the owner Stephen and he made things right. The vehicle is now fixed and working properly.

Have been dealing with Dakota K for many years, they have always provided knowledgeable service at competitive prices and great customer service

Ongoing problem for 9 years. Dealer repaired emissions error and check engine light returned in two weeks with same problem. AACCEL repaired the emissions, and now I can fuel the car in less than 15 minutes and pass the Will County emissions testing.

Once again, you guys rock! Thank you so very much!!!!

I was so lucky to have brought my car for service on Monday. I have had so many bad mechanics try to fix my car but Velasquez and Darwin FINALLY got to the root of the problem and fixed my check engine light that was on for months. Other mechanics claimed they fixed the check engine light problem but the didn't. It is NOT easy finding a good, honest mechanic these days. I know I finally found one and can confidentially bring my cars to Velasquez in the future. Darwin also changed the gaskets. I had paid a mechanic to change them a few months ago but apparently didn't. I actually paid to have the purge valve and gaskets changed but they never were. Darwin even showed me the defective parts. Thank you Darwin and Velasquez mechanic shop. Brian 2-9-22

Very professional & knowledgeable. They informed me what my vehicle.

I have had Jim at Advanced take are of several of my cars over the last year.I found this shop to be very fair and they got the work done quickly. I would recommend this repair shop to everyone.

Great people who tell it like it is. Honest, clear, professional and personal care you know you can trust 30 seconds after walking in. My first visit cost more than I had hoped, but I left fully satisfied and confident in the work done. I came in on a referral by a long time customer and expect that I'll also be recommending Doc Motor Works for years to come!