The Best Auto Repair Shops in Manchester, NH
We graded 10 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
From 99,088 Google reviews of 218 top-rated auto repair shops nationwide; 10 of them in Manchester, NH. Updated November 1, 2026.
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Best auto repair shops in Manchester for exhaust
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Precision ImportsHow Job match is calculatedBuilt only from reviews Google tagged “Exhaust”:Stars on this job 55%5.00★Number of such jobs 25%9Overall Experts Score 20%93Job match= 93Stars are pulled toward the category average (4.84★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.93
South Elm AutomotiveHow Job match is calculatedBuilt only from reviews Google tagged “Exhaust”:Stars on this job 55%5.00★Number of such jobs 25%8Overall Experts Score 20%95Job match= 92Stars are pulled toward the category average (4.84★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.92
Redman's Muffler & AutomotiveHow Job match is calculatedBuilt only from reviews Google tagged “Exhaust”:Stars on this job 55%5.00★Number of such jobs 25%8Overall Experts Score 20%89Job match= 90Stars are pulled toward the category average (4.84★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.90
P & N Automotive ServicesHow Job match is calculatedBuilt only from reviews Google tagged “Exhaust”:Stars on this job 55%5.00★Number of such jobs 25%5Overall Experts Score 20%89Job match= 85Stars are pulled toward the category average (4.84★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.85Job match = this company’s ★ on reviews Google tagged “Exhaust” (shrunk toward the category average when there are few), how many such jobs it has done, and its overall Experts Score.
What customers said about exhaust
South Elm AutomotiveExcellent knowledgeable team. Good communications. They are a pleasure to work with, putting customer first.
P & N Automotive Services20 plus years and Iv'e never been disappointed in the service or quality of their work.
Redman's Muffler & AutomotiveI don’t bring my vehicles anywhere but Redman’s, and haven’t for 20 years now. You won’t find a better skilled mechanic or a more honest repair shop in NH. Don and his team are always looking out for you, making sure you get the most out of each part (not replacing things before they truly need to be) and have fair…
Precision ImportsHave worked with Precision since 2003 servicing and upgrading a wide range of cars: Aston Martin, Lotus, Porsche, Mercedes, Audi, BMW, Mazda, GMC, etc. Excellent technical skills, customer service. Trustworthy and accountable. Highly recommend.
South Elm AutomotiveVery friendly honest people does super work they don't take long to fix what is needed we
Precision ImportsReally good experience, they were very knowledgeable, and professional and made sure to get my vehicle in and out nice and quick and made sure to explain everything in detail ,would definitely recommend this shop.
Overall ratings
Experts Score 0–100Experts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. and a letter grade per factor (A = top 20% of auto repair shops).
| # | Company | ScoreExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. | FactorsFactor grades, in orderSatisfaction (54%): Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Reliability (24%): How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Craft & service (0%): Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Value (14%): Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Momentum (0%): Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Replies to reviews (7%): How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.One letter per factor score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = below 20. | ★Google star rating as shown on Google Maps. | Typical billMedian bill customers of this company reported in their reviews (needs 3+ priced reviews). |
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| 1 |  DECI AUTOMOTIVEManchester, NH | A 99How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%99+58.1Reliability 26%98+25.6Value 15%100+15.2Experts Score= 99Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AA– | 5.00 | — |
| 2 |  Ruben's Rubber Tire ShopManchester, NH | A 97How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%97+56.9Reliability 26%95+24.8Value 15%100+15.2Experts Score= 97Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AA– | 4.97 | — |
| 3 |  E-Z Automotive ServicesManchester, NH | A 97How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%97+56.9Reliability 26%96+25Value 15%100+15.2Experts Score= 97Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AA– | 4.98 | — |
| 4 | South Elm AutomotiveManchester, NH | A 95How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%97+52.9Reliability 24%99+24Value 14%100+14.1Replies to reviews 7%57+4Experts Score= 95Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAC | 4.96 | — |
| 5 | Precision ImportsManchester, NH | A 93How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%92+50.2Reliability 24%90+21.8Value 14%100+14.1Replies to reviews 7%100+7.1Craft & service penalty97−0.3Experts Score= 93Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.89 | — |
| 6 | Redman's Muffler & AutomotiveManchester, NH | A 89How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%95+51.8Reliability 24%92+22.3Value 14%100+14.1Replies to reviews 7%17+1.2Experts Score= 89Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAF | 4.89 | — |
| 7 | P & N Automotive ServicesManchester, NH | A 89How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%93+50.7Reliability 24%92+22.3Value 14%100+14.1Replies to reviews 7%30+2.1Craft & service penalty99−0.1Experts Score= 89Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAD | 4.89 | — |
| 8 | Russell Auto Inc.Manchester, NH | A 88How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%94+51.3Reliability 24%94+22.8Value 14%87+12.3Replies to reviews 7%22+1.6Experts Score= 88Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAD | 4.88 | — |
| 9 |  Best Union Auto RepairManchester, NH | A 85How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%91+49.6Reliability 24%85+20.6Value 14%100+14.1Replies to reviews 7%16+1.1Experts Score= 85Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AAF | 4.89 | — |
| 10 |  Tire WarehouseManchester, NH | B 74How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%73+39.8Reliability 24%62+15Value 14%100+14.1Replies to reviews 7%100+7.1Momentum penalty76−2.4Experts Score= 74Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | BB–ABA | 4.79 | — |
What jobs cost
What customers paid, from the price Google asks reviewers to report.
| Job | Low25th percentile: 1 in 4 customers paid less than this. | TypicalMedian of the bill customers reported in their Google review (Google asks reviewers for a price range; we use the middle of each range). | High75th percentile: 1 in 4 customers paid more than this. | FairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”. |
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Auto Repair Shops in Manchester, NH at a glance
How the 10 auto repair shops we rated in Manchester, NH compare, and what customers praise most.
Experts Score grades
A = score 80+, F = below 20.
- Grade A990%
- Grade B110%
- Grade C00%
- Grade D00%
- Grade F00%
Google ratings
Average stars per company.
- 4.90★ and up440%
- 4.80–4.89★550%
- 4.60–4.79★110%
- Below 4.60★00%
What customers praise
Share of Google review highlights.
- Quality5,94526%
- Professionalism6,68730%
- Responsiveness70%
- Punctuality4,88122%
- Value4,99822%
Was the price fair?
All price verdicts left with reviews.
- Great price5,42845%
- Reasonable6,11550%
- Overpriced2622%
- Not sure3453%
Price verdicts by year
Share calling it great / reasonable / overpriced.
How we grade
Satisfaction (54%) — Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.
Reliability (24%) — How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.
Craft & service (penalty, up to −10) — Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.
Value (14%) — Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.
Momentum (penalty, up to −10) — Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.
Replies to reviews (7%) — How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.