Engine repair service near Monsey, NY

Providing the Locust Valley community with professional, prestigious and the highest of quality automotive repair since 1978.

I have been using Sierra Auto for over 15 years. The tech (Johnny Jr.) is a ASE master tech. Really knows his stuff. They were always able to work out pricing from day one. They also stand behind their work. I would recommend them any day.

Jeet is professional and extremely efficient

Not worth the trouble. On a recommendation from our local parts store, we sent a cylinder head out as it had a slight misfire at idle. On removal and saw the seat was partially sticking out from the head. On the recommendation from Frank at the machine shop he replaced all the exhaust seat , not just the one in question.On installation after six hours worth of labor, gaskets, oil and anti freeze,, on start up the number four cylinder now misfires all the time with heavy oil consumption. After doing a leak down test,compression test and running our findings by a paid diagnostic venue,we came to the conclusion that it had a head issue that we never had before. We sent to head back down to Frank and was supposedly thoroughly check to find it there was no issue with his job so we put the head back on the car. Obviously it was the same issue , heavy oil consumption and missing number four cylinder. We double and triple checked our work along with a call to our automotive diagnostic hotline to come to the same conclusion that it was a head issue. We bought a brand new head from Mini and the problem is cured. At this point right now we are asking for just our money back , as we will eat the 16 hours in labor and parts... with no response from this company . Poor workmanship and poor customer Service !

this service station is great. you will not get cheated here, and they really do quality work. been using them for years, and would not go elsewhere.

The mobile service was great! They came at the time they said they would, took my old battery out, popped the new one in, 30min tops! They were very Friendly, friendly is good! I trusted them right away. My baby(car) is old and her age shows, i need a shop that can keep her going. I need a Honest mechanic that I can trust and wont BS me. It is very HARD for a single women to find HONEST TRUSTWORTHY Mechanics, I feel like I have. Plus they are right next to TJMAXX!

Great work! Very professional and skilled individuals. Luis was a great help very informative, knowledgable, skilled, and efficient even got a free car wash. Excellent work at an excellent price.

DO NOT USE THIS SHOP. charged for repairs they did not complete, lft with damages and the "GUranty" isn't worth the paper it's written on. Shoddy, dishonest.