Specialized Automotive Repair (U.S.) — NAICS 811114

A Histometrics industry primer for public-market and private investors.

1. Overview

Specialized automotive repair is the business of fixing one system on a vehicle rather than the whole thing: brakes, mufflers and exhaust, transmissions, suspension and steering, electrical systems, and tune-ups. In the federal classification system it is the "specialist" slice of car repair — a plumber-for-one-thing model — distinct from the general shop that does everything, including engines.[1] It is a local, labor-intensive service business: demand recurs, but customers can defer non-urgent work, and competition is usually geographic.

Why it matters to an investor: this is a piece of the roughly $112 billion U.S. automotive aftermarket, the durable, largely non-discretionary work of keeping an existing 289-million-vehicle fleet running.[8][6] Demand is anchored to how old cars are and how far they are driven, not to new-car sales — which makes it defensive and mildly counter-cyclical. When people cannot afford a new car, they repair the old one.

• Public ways in: No pure-play public company exists for this narrow code. The closest listed operator is Monro, Inc. (undercar service and tires). Investors also get exposure through Driven Brands (franchisor of Meineke), auto-parts suppliers such as Genuine Parts (NAPA), and the service departments of publicly traded car-dealer groups. Tickers and scale are in Section 4.
• Private ways in: This is overwhelmingly a private, small-business industry — individual shops, regional operators, and franchise brands (AAMCO, Midas, Meineke). It is an active private-equity roll-up target, so the realistic private route is buying, franchising, or backing multi-shop operators.

The distinction that runs through this primer: the federal 811114 code is deliberately narrow and captures only a sliver of the money spent on brake/transmission/exhaust/electrical work. Most of that work actually happens inside general repair shops, dealerships, and tire chains that carry different classification codes (Sections 2–3). This is a defensive-but-not-automatic-growth industry: the vehicle fleet supports demand, but fragmentation limits national pricing power.

2. What it is and how it is structured

Scope. The U.S. Census Bureau's North American Industry Classification System (NAICS) defines code 811114 as establishments primarily providing specialized mechanical or electrical repair and maintenance, except engine repair and replacement. The official illustrative examples are brake-repair shops, suspension-repair shops, exhaust/muffler shops, automotive electrical-repair shops, transmission-repair shops, and tune-up shops.[1] Classification is by an establishment's primary activity, so a diversified chain may operate locations spread across several codes.

What it excludes (naming the adjacent codes matters — this is where most car-repair dollars sit):

Many chains advertise "full-service" automotive care even though only part of their operations fits 811114.[1]

How the 2022 code came to be. The 2022 NAICS revision merged three former 2017 codes — 811112 (exhaust), 811113 (transmission), and 811118 (other mechanical/electrical) — into today's single 811114, while pushing engine work into General Automotive Repair (811111).[2] So the industry is, by construction, the shop that specializes and does not pull engines.

Ownership mix. The industry is atomized. Ownership runs in four rough groups: independent owner-operated shops; multi-unit regional operators; franchisees of national brands (AAMCO, Midas, Meineke); and dealership service departments plus corporate or private-equity-backed platforms. The federal concentration data (Section 3) show it is one of the least-concentrated industries in the economy. Franchisors themselves rarely own the shops — they license the brand and collect royalties. The federal statistics carry no legal-form or ownership split, but the very low concentration points to a long tail of tiny businesses even as franchise and roll-up disclosures show multi-unit ownership expanding.[4]

3. How big it is

Our ground-truth federal figures, for the employer portion of the industry (shops with paid staff). They come from different programs and reference years and should not be summed into a single-period income statement.

That works out to roughly 4 employees per establishment and about $767,000 in receipts per firm — the profile of a very small business.[3][4] The Small Business Administration (SBA) treats a firm as "small" up to $9.0 million in average annual receipts, so essentially the entire industry is small business.[5]

Concentration — near-textbook fragmentation. The largest 4 firms take only 6.4% of revenue; the top 50, just 15.1%.[4] The Herfindahl-Hirschman Index (HHI, a standard concentration gauge that sums the squared market shares of all firms; antitrust regulators consider anything below 1,500 "unconcentrated") is 15.6 — essentially atomistic competition.[4] That the market is this fragmented is a reported fact; the idea that consolidation can therefore create operating efficiencies is a forward-looking judgment.

Two undercount caveats — read these before quoting the $5.9 billion.

1. Nonemployer businesses are excluded. County Business Patterns (CBP) counts only establishments with paid employees; it omits the self-employed and businesses with no employer identification number. Car repair broadly is full of one-person and mobile operators who file as sole proprietors; the Census tracks these separately in its Nonemployer Statistics program. We do not have an ingested nonemployer count specific to 811114, so we do not state one — but the true business count is materially higher than 8,223.
2. The code is narrow by design. Because engine work and "general" service route to 811111, and dealerships (retail), tire chains, and quick-lubes carry other codes, the $5.9 billion 811114 line badly understates the real economic size of brake/transmission/exhaust/electrical repair. The broader aftermarket it belongs to is on the order of $112 billion (2025, parts and service combined),[8] and franchised new-car dealers alone booked roughly $164 billion of service-and-parts revenue on about 276 million repair orders in 2025.[19] Read 811114 as "pure-play mechanical specialists," not "all specialty repair."

The federal file provides no revenue growth, profit, average repair order, bay utilization, technician count, customer mix, or regional share — where those appear below they come from cited industry sources and are labeled as such.

4. The investable universe

There is no pure public play on 811114. The listed companies below straddle tires, oil changes, collision, and parts; tickers and scale are for the how-to-invest lens only.

Public companies with the most direct exposure:

Major private / franchise owners (the bulk of the industry):

• Mavis Tire Express Services (backed by BayPine, TSG Consumer Partners, West First Management and others) — more than 3,500 locations, including nearly 1,300 franchised after acquiring the Midas chain in 2025; also operates Tire Kingdom and NTB.[14] In July 2026 Mavis announced a deal to buy Pep Boys from Icahn Enterprises for roughly $700 million in cash (~800 Pep Boys locations); the transaction had not yet closed at publication and would push Mavis past 4,400 service centers.[15]
• Sun Auto Tire & Service (Leonard Green & Partners, with Greenbriar Equity involved) — its 2026 network page lists more than 575 locations.[17]
• Christian Brothers Automotive (Roark Capital) — 310+ franchised locations.[18]
• Big Brand Tire & Service (Percheron Capital) — 250+ stores.[18]
• Icahn Automotive Group — AAMCO (transmission/powertrain specialist) and Cottman, held via American Driveline Systems, which Icahn Enterprises acquired in 2017, plus Precision Tune Auto Care; Icahn retains these in the pending Pep Boys sale.[16][15]
• FullSpeed Automotive (MidOcean Partners) — Grease Monkey, SpeeDee, Kwik Kar; primarily oil-change and preventive maintenance, so much of its exposure sits outside 811114.[20]
• TBC Corporation (a Sumitomo Corporation / Michelin joint venture) — mainly tire distribution and Big O Tires; divested Midas to Mavis in 2025.[21]
• Plus thousands of independent single-shop specialists and franchisees — roughly 70% of the market that no chain owns.[18]

Bottom line: to own this industry publicly, you buy Monro (the nearest thing to a pure play), Driven Brands (the franchisor angle), or dealer-group "fixed ops" as a proxy — adjusting each for tire, oil-change, collision, glass, and franchise exposure. To own it privately, you buy or franchise shops.

5. How the money works

A specialty shop sells two things: labor (billed hours × the shop's labor rate) and parts (bought wholesale, sold at a markup), with smaller streams from diagnostic/inspection charges, fleet and commercial accounts, and warranty or service-contract payers. Owner economics come down to a few levers.

• Labor rate and labor margin. Independent shops charge roughly $120–$160 per labor hour in 2025–26 (national benchmark near $140), and target 50–70% gross margin on labor because the technician's wage is far below the billed rate.[18b] Parts typically carry a 40–50% gross margin.[18b]
• Car count and average repair order (ARO). Volume (repair orders per day) times ARO (the average ticket) drives the top line. Specialty work — a transmission rebuild, a brake job, a diagnostic-heavy electrical fault — tends to carry higher tickets and higher parts content than an oil change.
• Bay and technician productivity. Fixed costs (rent, lifts, diagnostic scan tools, insurance) are largely set, so profit is about keeping bays full and technicians "billing" more hours than they clock. The most useful operating gauges are sold labor hours per available bay and billed hours per technician — more meaningful here than manufacturing-style capacity utilization — alongside comeback (rework) rates and the customer-pay/warranty/fleet mix.
• The franchise/royalty model. For AAMCO/Midas/Meineke-style brands, the franchisor is asset-light: it collects an upfront franchise fee plus an ongoing royalty (a percentage of the franchisee's sales) and a national ad-fund contribution. The franchisee owns the real-estate risk and the labor. Because of this, a franchise system's system-wide sales should never be confused with the franchisor's own consolidated revenue.
• The health metric for chains: same-store sales. For any multi-unit operator, comparable- (same-) store sales growth — revenue from shops open in both periods — separates real demand from growth-by-acquisition.[13]
• For acquirers: EBITDA multiples. Private buyers value shops on EBITDA (earnings before interest, taxes, depreciation and amortization). Single owner-operator shops trade around 2–4.5×, multi-shop operators 3.5–6.5×, and platform-scale operators (>$5M EBITDA) 7–10×+.[18] The spread is the entire private-equity thesis: buy small shops cheap, bolt them together, and the combined platform re-rates to a higher multiple — though that arbitrage can understate the lease, maintenance-capital, and debt burdens EBITDA leaves out.

6. What drives demand

Demand is unusually predictable and tied to the installed base of cars, not new-car sales.

• Vehicle age. The average U.S. light vehicle hit 12.8 years old in 2025, a record and still rising, with the vehicle-in-operation fleet at about 289 million.[6] Older cars need more specialty repair per mile — the roughly 6-to-14-year window is the sweet spot for brake, suspension, and transmission work.[9]
• Miles driven. Federal Highway Administration (FHWA) data show 3.294 trillion vehicle-miles traveled (VMT) in 2024, rising about 1% into 2025, with hundreds of billions of those miles shifting onto older vehicles as the fleet ages — directly more wear and more repairs.[7][9]
• New-car affordability (counter-cyclical kicker). High new-vehicle prices and financing costs push consumers to keep and fix existing cars, a tailwind for repair when the economy weakens — though it can tilt spending toward urgent safety work and away from elective maintenance.[9]
• Vehicle complexity. Modern cars are electronics-dense, which favors shops with diagnostic tools and trained technicians and raises the value of the electrical/electronic side of 811114.
• Technician supply. The U.S. Bureau of Labor Statistics (BLS) projects about 70,000 annual openings for automotive service technicians and mechanics over 2024–2034, with 4% occupational growth and a 2024 median wage of $49,670 — a labor market tight enough to cap how many bays a shop can run.[10]
• Fleet and commercial demand. Fleet customers value uptime and predictable pricing, producing repeat volume but with more negotiating power than retail customers.

The offsetting force — non-discretionary but deferrable. Owners can postpone a shock or a slipping transmission for months, so in tight times repair volume softens at the margin even though it never collapses.

7. Regulation

There is no federal license to be a mechanic, but the industry is meaningfully regulated at several levels — a patchwork of federal, state, and local rules.

• State consumer-protection rules. Many states regulate repair dealers directly. California's Automotive Repair Act, enforced by the Bureau of Automotive Repair (BAR), requires shops to register, give a written estimate, and get the customer's authorization before doing work (with fresh consent before exceeding the estimate).[23] These estimate/authorization rules are the industry's core compliance discipline and a frequent source of consumer disputes.
• Environmental — refrigerant, emissions, and waste. The Environmental Protection Agency (EPA) requires anyone servicing a motor-vehicle air-conditioning system for pay to hold Section 609 certification, use approved equipment, and recover rather than vent refrigerant.[25] Used oil, filters, coolant, solvents, batteries, and tires require controlled storage, recycling, or disposal, with state rules often stricter than federal.[26] Under the federal Clean Air Act and programs such as the California Air Resources Board (CARB), it is illegal to tamper with or remove emissions equipment, and replacement catalytic converters must be specifically approved; California's anti-tampering statute (Vehicle Code §27156) carries fines up to $2,500 per violation.[24] Exhaust and catalytic-converter work therefore lives inside emissions law, and state safety/emissions inspection programs generate steady repair demand.
• Worker safety. The Occupational Safety and Health Administration (OSHA) governs chemical exposure, lifts and tools, noise, ergonomics, and hazard communication.[27]
• Warranty rights. The Federal Trade Commission (FTC) enforces the Magnuson-Moss Warranty Act, which generally bars conditioning a consumer warranty on the use of a particular branded part or service provider — a protection that helps independent shops keep customers whose vehicles are still under manufacturer warranty.[28]
• Recalls. The National Highway Traffic Safety Administration (NHTSA) administers safety recalls, which are generally repaired free through the manufacturer's dealer network — an advantage for franchised dealers on warranty and recall work.[29]
• Right to repair (data access). The forward-looking fight is over whether independent shops can reach the diagnostic and telematics data that newer vehicles generate. Massachusetts voters passed a stronger right-to-repair law; automakers and the aftermarket signed a national data-sharing commitment in 2023, but a coalition of independents rejected it and litigation continued — a federal court largely upheld the Massachusetts law in early 2025, and the case remained on appeal before the First Circuit as of early 2026.[24b] The stakes: if original-equipment manufacturers (OEMs) can wall off vehicle data, independent specialty shops lose the ability to service newer cars, tilting work toward dealers.

8. Competitive dynamics and consolidation

Competition is local and reputation-driven — the durable advantages are trusted technicians and service advisors, convenient locations and fast turnaround, accurate first-time diagnosis, parts availability, transparent estimates, and strong repeat/review-driven demand.

• A fragmented base being rolled up. The federal data confirm extreme fragmentation (top-50 share ~15%, HHI 15.6),[4] and industry analysts put the 50 largest firms at under 10% of mechanical-repair revenue, with independents ~70% of the market.[18] That fragmentation is exactly why capital is flowing in: roughly $5 billion of private-equity equity has been deployed into auto-repair platforms since 2021, with national roll-ups (Mavis, Sun Auto, Christian Brothers, Big Brand) actively acquiring.[18] The 2025 Mavis–Midas deal and the 2026 Mavis–Pep Boys agreement are the signature transactions.[14][15]
• Competition from bigger, better-capitalized formats. The specialty shop competes not only with the shop across the street but with (a) franchised dealer service departments, whose "fixed operations" are a ~$164 billion, roughly 50%-gross-margin business and a strategic profit engine for public dealer groups,[19] and (b) tire chains (Discount Tire, Mavis, Sun Auto) that increasingly bundle brakes, alignment, and undercar service.
• Scale advantages. Consolidators win on parts-buying power, national warranties, software/diagnostic investment, marketing, and technician recruiting and training — all hard for a single shop to match. The playbook is to acquire a respected local operator, keep its brand and technicians, centralize procurement and back office, and add digital booking and fleet programs.
• Editor judgment. Consolidation should improve efficiency, but it does not automatically create pricing power. Low concentration means local competitors stay abundant, and poor integration or heavy debt can erase the benefits of scale.

9. Risks

• The EV transition — the defining long-term risk. Battery-electric vehicles (EVs) delete several 811114 revenue lines: no exhaust system, no conventional multi-speed transmission to rebuild, and regenerative braking that greatly extends brake-pad life.[11] Partly offsetting: EVs are heavy and high-torque, wearing tires, suspension, and steering faster, and their electrical/electronic complexity plays to diagnostic-capable shops.[11] Near term the hit is modest — most shops now see EVs but a majority do not expect a material impact within two years — yet the mix shift is a genuine multi-decade headwind for exhaust and transmission specialists specifically, and the net effect on overall demand remains uncertain.
• Technician shortage and wage inflation. A structural shortage of qualified, ASE-certified (National Institute for Automotive Service Excellence) technicians raises labor costs and leaves bays idle even when customer demand is strong.[10]
• Dealer and chain competition taking share of the higher-value repair, aided by any right-to-repair loss that restricts independents' data access (Section 7).[24b]
• Parts-cost and wage inflation that shops may not pass through quickly enough, squeezing margin.
• OEM dependence — restricted diagnostic data, proprietary parts, software access, and warranty/recall relationships can favor dealers.
• Liability and reputation — a failed brake, suspension, transmission, or electrical repair carries bodily-injury, warranty, and brand risk.
• Roll-up leverage — acquisition platforms may carry substantial debt, leases, and integration obligations; fragmentation also cuts both ways, since thousands of subscale competitors limit pricing power until a local market is consolidated.
• Environmental compliance — mishandled oil, refrigerant, batteries, or solvents can produce cleanup costs and penalties.
• Cyclicality at the margin — repairs are deferrable; a consumer downturn softens volume even if safety work stays resilient.

10. How to invest, and the outlook

Public routes.

• Closest pure play: Monro (MNRO) — undercar mechanical service plus tires; note it has been closing underperforming stores (145 in fiscal 2026), so it is a turnaround/execution story more than a growth story.[12]
• Franchisor angle: Driven Brands (DRVN) for the asset-light Meineke royalty stream alongside its Take 5 growth engine — adjusting for its collision, glass, and oil-change exposure.[13]
• Proxy exposure: public dealer groups (AN, PAG, LAD, GPI, SAH, ABG) for the high-margin "fixed ops" repair economics,[19] and parts suppliers such as Genuine Parts (GPC), AutoZone (AZO), and O'Reilly (ORLY) as the picks-and-shovels layer.[22]
• What to review: comparable-store sales and car count, average repair order and labor-hour productivity, service gross margin, technician turnover, store closures/openings, acquisition integration, lease-adjusted leverage, maintenance capital spending, and cash conversion. Compare valuation on enterprise value ÷ EBITDA, remembering that measure can understate lease, maintenance, and debt burdens.

Private routes.

• Buy shops: acquire single or multi-shop operators — the classic roll-up. Entry multiples are low (2–6.5× EBITDA) and the value creation is combining them into a platform that re-rates to 7–10×+.[18] Diligence the tax returns, repair-order data by service type, technician productivity and pay, bay count and equipment, owner dependence, lease/zoning, environmental history, parts pricing, customer concentration, and comeback claims.
• Franchise: open AAMCO/Midas/Meineke units, trading a royalty for brand, systems, and buying power.
• Back a platform: co-invest with the private-equity consolidators already scaling — focusing on royalty economics, franchisee profitability, required capital spending, acquisition debt, and whether growth is real productivity or simply more acquisitions. The SBA's $9 million size standard is a federal classification threshold, not a valuation ceiling.[5]

Outlook (forward-looking). The demand backdrop is favorable: a record-old, still-aging fleet, rising miles, and new-car affordability keep cars on the road longer, all pointing to steady repair demand.[6][7][9] The industry's own structure — extreme fragmentation plus abundant private capital — should keep consolidation and franchising the dominant value-creation story for the next several years.[18] The base case is steady nominal growth with continued consolidation but uneven margins; the strongest operators will pair local trust with technician retention, parts availability, disciplined pricing, diagnostic capability, fleet relationships, and modest leverage — a large store count alone is not a moat. The two things to watch are the right-to-repair data fight (who gets to service newer cars)[24b] and the pace of EV adoption, which slowly erodes the exhaust and transmission niches at the heart of this code while opening a diagnostic/suspension niche for shops that invest to keep up.[11]

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Sources

1. U.S. Census Bureau / NAICS Association. NAICS 2022 Definition — 811114 Specialized Automotive Repair. 2022. https://www.naics.com/naics-code-description/?v=2022&code=811114; https://naics.askkodiak.com/naics/2022/811114
2. U.S. Census Bureau. 2017-to-2022 NAICS Concordance. 2022. https://www.census.gov/naics/concordances/2022_to_2017_NAICS.xlsx
3. U.S. Census Bureau. County Business Patterns, 2023 (establishments, employment, payroll for NAICS 811114). 2025. https://www.census.gov/programs-surveys/cbp.html
4. U.S. Census Bureau. 2022 Economic Census — Concentration and receipts, NAICS 811114 (firms, receipts, CR4/CR8/CR20/CR50, HHI). 2024. https://www.census.gov/programs-surveys/economic-census.html
5. U.S. Small Business Administration. Table of Small Business Size Standards (NAICS 811114 = $9.0M). 2023. https://www.sba.gov/document/support-table-size-standards
6. S&P Global Mobility. Average Age of Vehicles in the US Rises to 12.8 Years in 2025 (≈289M vehicles in operation). 2025. https://www.spglobal.com/automotive-insights/en/blogs/2025/05/average-age-of-vehicle-in-us
7. U.S. Federal Highway Administration. Traffic Volume Trends / Highway Statistics (3.294 trillion VMT, 2024). 2025. https://www.fhwa.dot.gov/policyinformation/travel_monitoring/tvt.cfm
8. Precedence Research / Market Research Future. U.S. Automotive Aftermarket Size (~$112B, 2025). 2025. https://www.precedenceresearch.com/us-automotive-after-market
9. Aftermarket Matters / Technavio. More Miles on Older Vehicles to Boost 2025 Aftermarket Repair. 2025. https://www.aftermarketmatters.com/national-news/more-miles-on-older-vehicles-to-boost-2025-aftermarket-repair/
10. U.S. Bureau of Labor Statistics. Occupational Outlook Handbook — Automotive Service Technicians and Mechanics (~70,000 annual openings 2024–2034; 4% growth; $49,670 median wage, 2024). 2025. https://www.bls.gov/ooh/installation-maintenance-and-repair/automotive-service-technicians-and-mechanics.htm
11. IMR Inc. / Tire Review. Impact of EVs on Independent Repair Shops. 2025. https://www.tirereview.com/imr-data-impact-electricvehciles-independent-repair-shops/
12. Monro, Inc. Form 10-K, Fiscal 2025, and fiscal-2026 store-closure disclosures (~1,260 company stores; 145 closures; ~1,115 remaining; ~$1.2B sales). 2025. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000876427&type=10-K
13. Driven Brands Holdings Inc. FY2025 results and segment disclosures (revenue ~$1.9B; ~$6.1B system-wide sales; Meineke ~780 franchised locations). 2025–2026. https://investors.drivenbrands.com/
14. Mavis Tire Express Services / TBC Corporation. Mavis completes Midas acquisition (>3,500 locations; ~1,300 franchised). 2025. https://www.tirereview.com/mavis-completes-midas-acquisition/
15. Business Wire / Tire Review. Mavis to Acquire Pep Boys from Icahn Enterprises for $700 Million in Cash (announced July 2026; Icahn retains AAMCO and Precision Tune). 2026. https://www.businesswire.com/news/home/20260720845773/en/
16. Aftermarket News / Tire Review. Icahn Enterprises Acquires American Driveline Systems, Franchisor of AAMCO and Cottman. 2017. https://www.aftermarketnews.com/icahn-enterprises-acquires-american-driveline-systems-franchisor-aamco-cottman-service-centers/
17. Sun Auto Tire & Service. Company / locations page (>575 locations; Leonard Green & Partners). 2026. https://www.sunautotire.com/

18. CT Acquisitions. Private Equity in Auto Repair (2026): Platforms & Multiples (Mavis, Sun Auto, Christian Brothers, Big Brand; EBITDA multiples; ~$5B PE deployed; ~70% independents). 2026. https://ctacquisitions.com/guides/private-equity-auto-repair-2026/ 18b. autoGMS / Identifix. Mechanic Labor Rates and Margins, 2025–2026. 2025–2026. https://myautogms.com/blog/mechanic-hourly-labor-rate-in-2025; https://www.identifix.com/blogs/mechanic-labor-rates-for-2025/

19. The Presidio Group; Sonic Automotive Form 10-K FY2025. Dealership fixed-operations revenue (~$164B service+parts; ~276M repair orders; ~50% gross margin). 2025–2026. https://thepresidiogroup.com/high-margin-dealership-business-lines-fixed-ops-and-fi-reclaim-the-spotlight-as-vehicle-margins-revert-to-structural-decline/

20. FullSpeed Automotive / MidOcean Partners. Brand portfolio (Grease Monkey, SpeeDee, Kwik Kar). 2024–2025. https://www.fullspeedautomotive.com/
21. TBC Corporation. Company profile (Sumitomo/Michelin JV; Big O Tires; Midas divestiture to Mavis). 2025. https://www.tbccorp.com/
22. Genuine Parts Company. Annual report / NAPA and NAPA AutoCare disclosures. 2025. https://www.genpt.com/
23. California Bureau of Automotive Repair. Write It Right — Documentation and Authorization Requirements; California Automotive Repair Act. 2019/2024. https://www.bar.ca.gov/pdf/writeitright.pdf

24. California Air Resources Board. Aftermarket Catalytic Converters; anti-tampering (Vehicle Code §27156). 2024. https://ww2.arb.ca.gov/aftermarket-catalytic-converters 24b. Auto Care Association; Landline Media. Massachusetts Right to Repair; 2023 data-sharing commitment; litigation status. 2023–2026. https://www.autocare.org/government-relations/current-issues/right-to-repair; https://landline.media/federal-court-rejects-challenge-to-massachusetts-stricter-right-to-repair-law/

25. U.S. Environmental Protection Agency. Section 609 Technician Certification (motor-vehicle air conditioning). 2024. https://www.epa.gov/mvac/section-609-technician-certification-programs

26. U.S. Environmental Protection Agency. Managing Used Oil and Automotive Wastes. 2024. https://www.epa.gov/recycle/managing-used-oil
27. U.S. Occupational Safety and Health Administration. Auto Repair and Body Shop hazards. 2024. https://www.osha.gov/
28. U.S. Federal Trade Commission. Magnuson-Moss Warranty Act; Auto Warranties and Routine Maintenance. 2024. https://www.ftc.gov/legal-library/browse/statutes/magnuson-moss-warranty-federal-trade-commission-improvements-act
29. U.S. National Highway Traffic Safety Administration. Recalls. 2024. https://www.nhtsa.gov/recalls