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    Chelmsford Diagnostic Service

    2.7 (7 reviews)
    Closed 8:00 am - 5:00 pm

    Services - Chelmsford Diagnostic Service

    Auto maintenance

    Auto fluids and filters maintenance

    Oil changes

    4 More Services

    Auto repairs

    Auto transmission repair

    Routine automotive maintenance

    Transmission leak inspection

    Chelmsford Diagnostic Service Photos

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    Mechanics Direct - Matt, The Best Service Writer Around

    Mechanics Direct

    (9 reviews)

    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

    Not all that impressed. Maybe you'll do better at this shop with a racecar. If you've got an old…read morebeater, go somewhere else. I came to the shop for alignment, an exhaust quote, and maybe smoothing the front rotors. Came out with half an alignment, an exhaust quote, new brake fluid, and other brake work to save up for. The Good: Very friendly, approachable sales and mechanical staff. Lots of show cars and happy customers on display. Reasonable with cost of work and parts. Called me back like they said they would. Clean shop, looks comforting. They did find a brake fluid leak I missed, and didn't give me a hard time about doing that work myself. The Meh: I paid for 4w alignment only to find they just adjusted the front/rear toe. No other shop had trouble with front camber, but this one said it "can't be adjusted on this car". No call to say that, and evasive about whether they tried and lost to rust -- or if they just didn't know it was adjustable. But that's what I paid them for... I guess they also inspected my air filter, because I found it wasn't closed all the way. A sudden extra roaring sound when I left should have been hard to miss. Verdict: My car is 18 years old, and though it looks its age I love it. But I hoped for more than I got from this shop.

    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

    (33 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.

    Chelmsford Diagnostic Service - oilchange - Updated May 2026

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