1. Chelmsford Diagnostic Service

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Lowell, MA

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Chelmsford Diagnostic Service

2.7 (7 reviews)
Closed • Closed

Services - Chelmsford Diagnostic Service

Oil changes

Routine automotive maintenance

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Mechanics Direct - Matt, The Best Service Writer Around

Mechanics Direct

(9 reviews)

I have to admit I tried going to cheap route at first with a family recommended mechanic who does…read morework for cheap. I was getting a Motor swap done. Aka a BIG JOB done. The cheap route ended up being HELL ON EARTH for me because it took 3 months for the job to be completed, only for the wrong motor to be installed twice. After three months of the job not getting done correctly, they tried giving me the car back saying it was fine and sent me ob my way to my possible death. I knew it wasn't fine. I bought it to Mechanics Direct so the could do a full inspection to see where the amateurs messed up. Come to find out they installed the wrong motor and the tire rod was about to fall off. The amateur mechanics refused to give a refund until I threatened them with a lawsuit. I knew about mechanics direct because I lived in the area and have always been hesitant because I knew they were expensive. I was at a point with my car though where I did not care about the cost I just wanted my car back after being away from it for multiple months. I could not be happier with the result. Mechanics Direct's professionalism have made me a life long costumer. Not only did my car get the motor swap done in less than a week, they paid for me to use a rental for the week. They discovered that the noise the other mechanic told me to not worry about was a tire rod that was loose too! My wheel could have fallen off if I didn't go to these guys. I went insane with my last mechanic and mechanics direct brought me peace of mind. You can't put a price tag on peace of mind. My car drives better than ever before. I am a satisfied customer knowing my family and I are safe in the road. Yes the cost is more expensive, but you get what you pay for, and that's PROFESSIONAL SERVICE and PEACE OF MIND. Don't make my mistake by trying to go the cheap route. It will cost you way MUCH, MUCH MORE in the long run.

We have brought 2 of our cars here, each time I've been happy with the outcome. Had an issue on the…read moresecond time Josh and the men took the car back in gave me some not so good of news, and took care of it.. good luck finding another business like that. Thank you mechanic's direct

J&R Auto Repair - Snap shot of the instructional video from Land Rover John and his team watched to fix my Freelander. They survived it and so did my my car!

J&R Auto Repair

(34 reviews)

This place is off the charts amazing! We use to use the Honda service dealer for our oil changes…read moreand other routine maintenance but after discovering J&R, we've never gone back. The Knowledge and service we receive goes above and beyond expectations. Recently my wife washed our key fob through the laundry destroying the circuit board in the fob making the minivan go crazy beeping, not starting, doors opening, etc. They ordered and reprogrammed the key for our van. We had a flat tire on our car and instead of ordering all new tires they actually repaired the damaged tire at a fraction of the cost. I had a complete overhaul of my 2009 Toyota Venza done by them two years ago because it was stalling out and bad things were starting to happen. I was kind of nervous to have all that work done because the car is up there in miles at 150k+. The Venza has run like a top ever since and I think about all the money they saved me as a result. The car still runs great and I've had to just do basic maintenance ever since. I don't usually write many reviews but these guys definitely deserve it. Overall if you take your car, truck or van there, you'll thank me. The place is clean, the owner John is super friendly, they know what they're talking about and not once have I ever felt like they tried to sell me on something I didn't need, which has not been my experience at many of the other shops. Place is a hidden gem in North Chelmsford.

0/10. They told me I had a 3 month warranty on their work and when the crappy work they did on my…read morecard paint began chipping again, they ignored my texts. They charged me an arm and a leg and then did not hold up their end of the deal. I am considering legal action.

Ray's Automotive

Ray's Automotive

(21 reviews)

I stumbled upon Ray's by a stroke of luck, and I'm very happy I did! I entrusted Ray and his crew…read morewith my 1977 Corvette, and there's no doubt she was in great hands. Ray is meticulous in his work, honest, communicative, and very fairly priced. Ray took the time to ensure he knew exactly what he was doing before he dove into a project on my car, which even meant cracking open a book or two. I really appreciated this attention to detail and willingness to go above and beyond. He was very honest and up front about the cost of work, and which fixes were worth doing, and which were not worth the money (i.e. the cost of fixing very minor leaks in a 43 year old car). He called me every step of the way to explain the work that had been done and to let me know proposed next steps. He always ACCURATELY priced out work and confirmed with me before proceeding. Overall, I'm super happy with the work Ray has done, I'll definitely go back in the future, and I would recommend him to anyone.

Ray's was recommended to me by a family member, and I'm so glad I took the recommendation. Ray…read morehimself is so honest, and even told me I didn't need a certain service done when a lot of other shops would've charged me unnecessarily. My car has been serviced by them a few times now, and each time I've been met with friendliness and affordability. I will continue to go back to Ray's for whatever auto services I need and encourage others to do so too!

Chelmsford Diagnostic Service - oilchange - Updated November 2026

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