business image

Triangle Service Center

Average Score
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
5.0
(2,598 Reviews)
96

Score Details

Last 30 Day Trend

Active Business

ReScore Reviews

ReScore
Overall Rating 0.0/5Overall Rating 0.0/5Overall Rating 0.0/5Overall Rating 0.0/5Overall Rating 0.0/5
Original Review
Overall Rating 0.0/5Overall Rating 0.0/5Overall Rating 0.0/5Overall Rating 0.0/5Overall Rating 0.0/5
0
Total ReScores
-
ReScore Average
96
Net Promoter Score ®

Business Details

About

In 1978 with more than 10 years in the automotive repair field under his belt, David McAllister bought the gas station at the apex of Concord and Boston roads. During the initial land surveying it was noticed that the land configuration was indeed a perfect “Triangle.” The rest of the naming was easy, due to the variety of automotive In 1978 with more than 10 years in the automotive repair field under his belt, David McAllister bought the gas station at the apex of Concord and Boston roads. During the initial land surveying it was noticed that the land configuration was indeed a perfect “Triangle.” The rest of the naming was easy, due to the variety of automotive repairs planned during the future; the second half had to be “Service Center.” The site, more than three decades old, is now a landmark used by many to give directions to either Carlisle or to the Bedford area. Take a right at Triangle to go to Great Brook Farms in Carlisle or a left to go to the town soccer fields.

Today, Triangle is still family owned with David's son Peter McAllister manning the helm. We are proud of our heritage and even more proud of the service we have been able to provide through the years to the motoring public in the Chelmsford, Carlisle, Billerica, Westford, and the greater Lowell area.
...more

Categories
Auto Repair, Car Maintenance, Tire Sales and Repair
Contact
(978) 256-7658

Business Hours

Mon
7:00 AM - 5:00 PM
Tue
7:00 AM - 5:00 PM
Wed
7:00 AM - 5:00 PM
Thu
7:00 AM - 5:00 PM
Fri
7:00 AM - 5:00 PM
Sat
closed
Sun
closed
* Eastern Time (Us & Canada)
177 Boston Road Chelmsford, MA 01824-4615
Triangle Service Center's Reviews
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
5.0
(2,598 Reviews)

JL
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JOHN / ANNETTE L.
Carlisle, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
10/30/2025
verified customerVerified Customer
10
Pinnacle of excellence
I go nowhere else!

KB
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KEVIN / LAURA B.
Chelmsford, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
10/23/2025
verified customerVerified Customer
10
They are the best
I've been going there for 20 years and totally trust them when it comes to servicing my vehicles. They also were so helpful for my daughter who's first purchase turned out to be a lemon. They identified he issue right away and while the dealer that sold it fought me on the diagnostics, it proved to be correct.

BV
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BOB / GAY V.
Chelmsford, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
10/23/2025
verified customerVerified Customer
10
Triangle Service center
Friendly and knowledgeable service

KK
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KATHY K.
Chelmsford, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
10/18/2025
verified customerVerified Customer
10
Kind, considerate and helpful
The team at Triangle always goes out of their way to make things easy and convenient for their customers. Wouldn't want to go anywhere else.

GK
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GREGG / DEBBIE K.
Chelmsford, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
10/15/2025
verified customerVerified Customer
10
Always Great Service
Best service anywhere!

WH
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WELLES SR./KATHERINE H.
Carlisle, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
10/10/2025
verified customerVerified Customer
9
Auto service, going beyond just repair
Triangle has mastered the service ethic. Thier methods are thoughtful, thorough and professional. We feel like we have a relationship for the care of our vehicles that keeps them running optimally and likely longer. The team is accommodating, informed and super practical.

RR
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RICK R.
Chelmsford, MA
Porsche 944
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
10/05/2025
verified customerVerified Customer
10
Business Culture
The Triangle Service Center is a perfect example of the beneficial results of establishing a culture of excellence. The customer benefits from unsurpassed quality of service and the enterprise benefits from customer loyalty and continuing business success. There is an all around positive experience for everyone. The outcome of the effort to achieve this culture is visible in the high quality of repairs, efficiency in execution of service and confidence for the customer.

KA
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KEN/DEBORAH A.
Chelmsford, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
10/02/2025
verified customerVerified Customer
10
10/1 Routine service
As always, excellent service

CO
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CAROL / GERARD O.
Carlisle, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
09/23/2025
verified customerVerified Customer
10
Great Service Team
Nico and Team were great. Explained all items in detail and delivered on time. Best service in the area

JG
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JOE G.
Chelmsford, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
09/21/2025
verified customerVerified Customer
10
Great service
Excellent service on my daughters car.

CC
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CATHY C.
Lowell, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
09/19/2025
verified customerVerified Customer
10
Top of the line service!!!
I love Triangle, it is a trust worthy family run business, I have been going to them for years!!! Always friendly and very knowledgeable about vehicles. They have always done top of the line service on my cars. I am a very happy customer and as long as they continue to be in business they will always be my number one go too to get my car fixed. Thank you Triangle for all the years of great service.

Verified Customer
Billerica, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
09/16/2025
verified customerVerified Customer
10
Rapid Response
Thank you to this super crew who quickly came to my rescue last week! Fast efficient service as usual. Special thanks to Robin for finding the solution! Also, everyone at the shop is very funny!

MK
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MICHAEL / TERRY K.
Chelmsford, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
09/03/2025
verified customerVerified Customer
10
Efficient on time service. Putting the customer 1st.
Managing a bunch of cars in the family. Triangle Auto Serive continues to be open to working with customers (me) to meets the needs of the cusotmers. Triangle has made it about meeting the customers needs and is willing to adjust to do it. Impressed.

Verified Customer
Chelmsford, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
08/30/2025
verified customerVerified Customer
10
Always quick and reliable!
Always quick, reliable, and trustworthy. Thank you!

DK
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DICK K.
Chelmsford, MA
Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5Overall Rating 5.0/5
08/21/2025
verified customerVerified Customer
10
Repair tire
Brought in flat tire with screw stuck in tread. It was repaired, and texted me. Picked up and all is good. A very efficient place, great customer service and communication.
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