Aftermarket Parts Disclosure and Your Right to Sue
Short answer: Whether the missing aftermarket parts notice gives you your own lawsuit depends on your state. Connecticut's statute points at an action you can file yourself, South Dakota's chapter contains a private action that nothing appears to exclude this duty from, California's chain ends with the Insurance Commissioner rather than with you, and Oklahoma's section prohibits both the insurer and the shop but contains no remedy at all.
This page is about five statutes and one regulation that were opened and read: Conn. Gen. Stat. 38a-355 and 42-110g, SDCL 58-33-70, 58-33-71 and 58-33-46.1, Cal. Bus. & Prof. Code 9875, 9875.1 and 9875.2, La. R.S. 51:2422 and 51:2424, and 15 O.S. 955, which sits inside the Aftermarket Crash Parts Regulation Act, 15 O.S. 951 to 956, of which only 955 was opened. It is a statement about those documents and not about anywhere else.
The four routes at a glance
| State | Who the disclosure duty binds | Where a violation goes | Can you bring it yourself |
|---|---|---|---|
| Connecticut | Insurer and repairer, from 1987 | Insurer half to CUIPA and the Commissioner; repairer half to CUTPA | Yes, expressly. 38a-355(b) -> 42-110b(a) -> 42-110g(a) |
| South Dakota | Insurer, repair facility and installer | "the penalties provided for in this chapter" | Arguable only. A private action sits in the same chapter, and no court has been shown joining the two sections |
| California | Insurer only | Ins. Code 790.06, a Commissioner's route | No route in this chapter. It ends in an injunction against the insurer |
| Oklahoma | Insurer and repair facility or installer, from 1991 | Not established here. 15 O.S. 955 carries no remedy, and 956, where the Act's index puts enforcement, was not opened | Not shown. Nothing in 955 names an action |
Where the sentence on your estimate came from
The paragraph your shop or your insurer is supposed to hand you was not written fifty times. Two texts were travelling between 1987 and 1991, and they behave differently.
The first is the NAIC's After Market Parts Model Regulation, adopted 1987. Its prescribed notice tells you the estimate is "BASED ON THE USE OF AUTOMOBILE PARTS NOT MADE BY THE ORIGINAL MANUFACTURER", and its enforcement section says a violation "shall be enforced through the state's Unfair Trade Practices Act by the penalties provided for in that Act." Asked directly, that read did not find the California disclosure paragraph in it, and did not find "repair facility" or "installer". A nonsense control string also came back absent, and three real strings came back with their sentences, so the instrument could return text when text was there. But the shapes of those three strings were not recorded, and this is a paginated PDF, so the control does not show whether a phrase broken across a page or column break would have been found. We do not claim those words are absent from the model regulation. They were not found, which is a weaker thing.
Connecticut belongs to that first family, and it came first. Conn. Gen. Stat. 38a-355, enacted by P.A. 87-334, uses the NAIC phrase. Its notice, in no less than ten-point type, reads: "This repair estimate is based in part on the use of replacement parts which are not made by the original manufacturer of the damaged parts in your motor vehicle." From 1987 the duty already sat on both parties: "any insurer or repairer, as defined in section 14-51, preparing a written estimate of the cost of such repairs shall clearly identify in such estimate each major replacement part to be used which is not manufactured by the original manufacturer of the damaged part in such motor vehicle."
California started a second text in 1989, and it bound one party. Cal. Bus. & Prof. Code 9875.1: "No insurer shall require the use of nonoriginal equipment manufacturer aftermarket crash parts in the repair of an insured's motor vehicle, unless the consumer is advised in a written estimate ... before repairs are made." Its disclosure document, in 10-point type or larger, begins "This estimate has been prepared based on the use of crash parts supplied by a source other than the manufacturer of your motor vehicle." Section 9875 of the same chapter imposes no duty on anyone; it is definitions, three of them, and the words "repair facility" and "installer" were not found on either host. The duty is 9875.1.
In 1990 that second text grew an obligation on the way out of California. South Dakota copied California's definitions section and then wrote two more. SDCL 58-33-70 scopes its defined terms to the single section that follows, and it adds "'Installer,' an individual who actually does the work of replacing or repairing parts of a motor vehicle" and "'Repair facility,' any motor vehicle dealer, garage, body shop, or other commercial entity which undertakes the repair or replacement of those parts that generally constitute the exterior of a motor vehicle."
Those two definitions exist to be used by one clause. SDCL 58-33-71: "No insurer may specify the use of non-OEM aftermarket crash parts in the repair of an insured's motor vehicle, nor may a repair facility or installer use non-OEM aftermarket parts to repair a vehicle, unless the consumer is advised in writing."
Read the rest of that section and the two halves are not the same size. The prohibition names the repair facility and the installer, but the estimate-identification requirement and the ten-point disclosure document are specified for parts "intended for use by an insurer". The shop's own duty in the text is the unqualified one: advise the consumer in writing.
Louisiana did the same thing in the same year, in La. R.S. 51:2422 and 51:2424(A), which name the repair facility and the installer in the same position, with one word changed. Louisiana says the insured must be advised, where California and South Dakota say the consumer.
That is why this reads as copying rather than a drafting convention. A convention does not require a legislature to write two new defined terms, scope them to the single section that uses them, and do it twice in the documents confirmed here, in South Dakota and Louisiana. Oklahoma's prohibition clause has since been confirmed on two hosts and carries the repair facility and the installer in the same position, and it is quoted below. But 15 O.S. 953, the Act's definitions section, was not opened, so the test that was run in South Dakota and Louisiana, two new defined terms scoped to the one section that uses them, was not run in Oklahoma, and Oklahoma is not counted as a third instance of that test.
And the model act in that family runs the other way. ALEC's After-Market Crash Parts Act carries the California paragraph, expanded to "one or more crash parts supplied by a source other than the manufacturer of your motor vehicle", and its own date lines say it was approved by the ALEC Board in January 1995 and reapproved in 2013 and 2017, which are ALEC's statements about ALEC's own document. It is dated after all five statutes, and its disclosure duty binds insurers only: "No insurer shall specify directly or indirectly the use of non-OEM after-market crash parts ... without disclosing the intended use of such parts." Its other duty, in Section 3, falls on the part supplier, which must mark the part with its manufacturer's logo or name. No duty falls on the shop. Controlled check on that page: "repair facility" not found, "installer" not found, nonsense control not found. The clause putting the duty on the shop travelled between states and did not travel into a model.
If nobody told you: the chains, followed to their ends
Connecticut: you can sue, and the statute says so
38a-355(b) does the work in two sentences: "Any violation of the provisions of this section by an insurer shall be deemed an unfair or deceptive insurance practice under section 38a-816. Any violation of the provisions of this section by a repairer shall be deemed an unfair or deceptive trade practice under subsection (a) of section 42-110b."
The repairer half then lands in CUTPA, which carries a damages section. Conn. Gen. Stat. 42-110g(a): "Any person who suffers any ascertainable loss of money or property, real or personal, as a result of the use or employment of a method, act or practice prohibited by section 42-110b, may bring an action in the judicial district in which the plaintiff or defendant resides ... to recover actual damages." Subsection (d) allows "costs and reasonable attorneys' fees based on the work reasonably performed by an attorney and not on the amount of recovery."
So: 38a-355(b) -> 42-110b(a) -> 42-110g(a). A Connecticut shop that handed you an estimate using non-original exterior panels without the identification and the ten-point NOTICE has, by the statute's own words, committed a CUTPA violation, and you may sue for your actual loss with fees recoverable. The insurer half does not close the same way; it is deemed a CUIPA violation, and CUIPA runs through the Commissioner. That is an express chain, because each statute names the next one.
South Dakota: a private action in the same chapter, and nothing that excludes this duty from it
South Dakota's chain is not express in that way. It is an inference, and it is worth setting out so you can see where it could fail.
58-33-71 ends: "Any violation of this section shall be enforced through the provisions of this chapter and shall be enforced by the penalties provided for in this chapter." That chapter contains a private action. SDCL 58-33-46.1, "Civil action for damages resulting from unfair or prohibited act--Attorneys' fees", in full: "Any person who claims to have been damaged by any act or practice declared to be unlawful by this chapter shall be permitted to bring a civil action for the recovery of all actual and consequential damages suffered as a result of such act or practice including reasonable attorneys' fees to be set by the court."
The contrary reading is available and should be stated. 58-33-71 routes violations to "the penalties provided for in this chapter", and 58-33-46.1 is a damages action rather than a penalty; its own heading calls it a civil action for damages. An insurer's lawyer would say that cross-reference points at the Director and not at you. What answers that is the trigger 58-33-46.1 actually uses, "any act or practice declared to be unlawful by this chapter", which is not the penalty cross-reference at all, and 58-33-71 plainly declares a practice unlawful. No court has been shown choosing between those two readings.
Chapter 58-33 does contain two sections whose only job is to take a private right away, SDCL 58-33-65.1 and 58-33-69, and neither of their stated ranges reaches 58-33-71.
We are not claiming that any South Dakota consumer has recovered under this chain. No decision applying 58-33-46.1 to 58-33-71 was found, and South Dakota case law was not searched systematically. What the documents support is narrower and still worth knowing: the crash-parts duty is not excluded from the chapter's civil action, and the two sections that do exclude other duties do not exclude this one. That is an argument on the face of the statutes, and not a holding.
California: it ends with a regulator
Cal. Bus. & Prof. Code 9875.2, the whole of the chapter's remedy, is one sentence: "Any violation of this chapter shall be enforced by the penalties provided in Section 790.06 of the Insurance Code."
Insurance Code 790.06 is a Commissioner's route end to end: an order to show cause, a report, a thirty-day wait, a petition filed through the Attorney General, and a superior court order enjoining and restraining the practice. It is prospective and institutional. It was read in the earlier pass of this work and was not re-opened for this page, so it is described here in substance rather than quoted. There is one dated fact worth putting beside it. In August 1988 the California Supreme Court held in Moradi-Shalal v. Fireman's Fund that the article 790.06 belongs to was not intended to create a private civil cause of action against an insurer, and the legislature enacted 9875.1 and 9875.2 the following year. We are not saying the legislature knew that or intended it. Two dated documents, placed next to each other.
Oklahoma: two prohibitions, two verbs, and no remedy in the section
Oklahoma was named as a gap when this page was drafted, because the first host to serve 15 O.S. 955 was an Oklahoma Senate PDF and what it served was fabricated. On 2026-09-05 the section was read on two independent hosts that agree word for word, so it can now be quoted. The Senate PDF was not used and is not a source here.
15 O.S. 955 opens with a single sentence carrying two prohibitions: "No insurer shall specify the use of non-original equipment manufacturer aftermarket crash parts in the repair of an insured's motor vehicle, nor shall a repair facility or installer use non-original equipment manufacturer aftermarket crash parts to repair a vehicle, unless the consumer is advised in writing."
The two limbs bind different parties with different verbs. The insurer's prohibited act is specifying. The repair facility's or installer's prohibited act is using. One condition, that the consumer is advised in writing, releases both.
What comes after that sentence does not run as far, and the difference matters. The numbered paragraphs are introduced by the clause "In all instances where non-original equipment manufacturer aftermarket crash parts are intended for use by an insurer:", and only inside that condition does the section require that "the written estimate shall clearly identify each such part" and that a disclosure document "in ten-point type or larger type shall appear on or be attached to the insured's copy of the estimate". That governing clause is narrower than the sentence above it. The itemised estimate and the ten-point disclosure are therefore not free-standing shop duties, and this page does not present them as any. Reading them that way is the same error class as the state insurance regulation elsewhere in this work whose conditional duties were quietly flattened into unconditional ones by a paraphrase standing one step away from the text. It is also the same shape as South Dakota above: the prohibition names the shop, the disclosure machinery is written around the insurer.
The paragraph Oklahoma prescribes is California's, with a warranty sentence added: "This estimate has been prepared based on the use of crash parts supplied by a source other than the manufacturer of your motor vehicle. Warranties applicable to these replacement parts are provided by the manufacturer or distributor of these parts rather than the manufacturer of your vehicle."
Section 955 as read contains no certification requirement, no quality standard, no consent beyond being advised in writing, and no remedy. Enforcement is not in it. The Act's own section list places enforcement in 15 O.S. 956, which was not opened for this page, so nothing here says where an Oklahoma violation goes, what penalty attaches, or whether a consumer can bring anything at all. One further note, offered as an observation and not as a lineage: Oklahoma's condition uses "consumer", which is California's and South Dakota's word, where Louisiana says the insured. The earlier record of this work has Oklahoma copying Louisiana. This page did not re-derive that and does not disturb it, and one word settles nothing.
What we could not verify
The South Dakota route is the largest of these. No court has been shown joining 58-33-46.1 to 58-33-71. No decision applying the chapter's private action to the crash-parts duty was found, South Dakota case law was not searched systematically, and no consumer is shown to have recovered under that chain. What the statutes support is that the duty is not excluded from the chapter's civil action and that the two sections which do exclude other duties do not reach this one. That is an argument on the face of the statutes, and not a holding, and whether a court would read a section routing to "penalties" as reaching the damages action is the open question the whole South Dakota route turns on.
Oklahoma is quoted here because two hosts agree, and three things about it stay open. 15 O.S. 956, the Act's enforcement section, was not opened, so this page says nothing about where an Oklahoma violation goes or what follows one. Whether the two hosts are genuinely independent transcriptions or share an upstream source was not tested; what is recorded is that they agree word for word on the operative sentence and on both numbered paragraphs, differing only in the history note, where one carries the bill number and the other does not. And the fabrication that opened this stays on the record: an Oklahoma Senate PDF returned wholly fabricated text for 15 O.S. 955 on 2026-09-04, with a real but wrong session law citation attached. That host was not used for this page, the fabrication was not characterised further, and the page's rule of two independent hosts is what closed the gap rather than any second reading of a first one.
The NAIC model regulation is a further limit. The California disclosure paragraph, "repair facility" and "installer" were not found in it, and a nonsense control also came back absent while three real strings returned their sentences. But the shapes of those three strings were not recorded, and the document is a paginated PDF, so the control does not show whether a phrase broken across a page or column break would have been found. We do not claim those words are absent from it. They were not found.
No enforcement instance was found for any of these duties: no order, no penalty, no market conduct finding, no reported decision. That cuts both ways, and honestly. It is equally consistent with a world where estimates carry the notice because it is cheap to print, and with a world where nobody checks. Those were not distinguished.
In California, what was established is that the chapter's own remedy runs to the Commissioner and stops there. Whether any other body of California law gives a consumer a personal route off the same facts was not examined here. Cal. Ins. Code 790.06 and Moradi-Shalal were read in the earlier pass and not re-opened, so both are described rather than quoted, and so is Louisiana.
Connecticut's section carries one appellate citation in thirty-eight years, at 231 Conn. 707, and that case was not identified. No case running the 38a-355 -> CUTPA chain was found, and trial-level decisions were not searched at all. The limitation period in 42-110g was not checked.
This page makes no claim about any state not named in it. Seven jurisdictions' instruments were opened across this work. Nothing here says other legislatures do or do not have such statutes, because that was not looked at.
What you can actually do
Start by asking for the written estimate and reading it, because in every one of these texts the duty attaches to a document, which means the violation is on paper or it is nowhere.
If you are in Connecticut and the estimate from the shop uses non-original exterior sheet metal or plastic without identifying those parts and without the ten-point NOTICE, the statute has already characterised that as a CUTPA violation, and a consumer lawyer can tell you in one conversation whether you have an ascertainable loss worth suing over. The fee provision in 42-110g(d) is why that conversation is worth having. 42-110g also carries a limitation period, which was not checked for this page, and it is the first thing to ask a lawyer about.
If you are in South Dakota, the same paper and the same question apply, against chapter 58-33, but note two things. The detailed disclosure machinery there is written around the insurer, so the shop's duty in the text is the shorter one, and the route from that duty to your own lawsuit is an argument on the statutes rather than a chain a court has been shown running.
If you are in California, the honest answer is that the route the legislature wrote runs to the Insurance Commissioner, so a complaint to the Department of Insurance is the mechanism the statute actually gives you, and it is aimed at the insurer's practice rather than at your bumper.
If you are in Oklahoma, the prohibition in 15 O.S. 955 reaches the shop as well as the insurer, and the question the text puts to both of them is whether you were advised in writing. What the section does not contain is any remedy, and 956, where the Act's index puts enforcement, was not opened for this page, so no route is described here for you to follow.
In any of these places, a $340 part is very rarely worth a lawsuit, whatever right of action exists, and a regulator acting on a systematic practice may do more than you can. That is not a satisfying answer and it is the one the documents support.
Sources
Each statute quoted above was confirmed on two independent hosts. Each was read on 2026-09-04 unless a different date is given below.
- Conn. Gen. Stat. 38a-355 (P.A. 87-334): law.justia.com/codes/connecticut/title-38a/chapter-700/section-38a-355/ and codes.findlaw.com/ct/title-38a-insurance/ct-gen-st-sect-38a-355.html
- Conn. Gen. Stat. 42-110g: law.justia.com/codes/connecticut/title-42/chapter-735a/section-42-110g/ and codes.findlaw.com/ct/title-42-business-selling-trading-and-collection-practices/ct-gen-st-sect-42-110g.html
- SDCL 58-33-70 and 58-33-71 (SL 1990, ch 408): sdlegislature.gov/api/Statutes/Statute/58-33-70 and /58-33-71 (the Legislature's own service, whose human pages return no text to a fetcher) and law.justia.com/codes/south-dakota/title-58/chapter-33/
- SDCL 58-33-46.1 (SL 1974, ch 319), 58-33-65.1 and 58-33-69: sdlegislature.gov/api/Statutes/Statute/58-33-46.1 and law.justia.com/codes/south-dakota/title-58/chapter-33/section-58-33-46.1/
- Cal. Bus. & Prof. Code 9875.1 and 9875.2 (Stats. 1989, Ch. 817): california.public.law/codes/ca_bus_and_prof_code_section_9875.1 and _9875.2, and codes.findlaw.com/ca/business-and-professions-code/bpc-sect-9875-1.html and bpc-sect-9875-2.html
- La. R.S. 51:2422 and 51:2424 (Acts 1990, No. 765): legis.la.gov and law.justia.com/codes/louisiana/. Read in the earlier pass on both, described here and not quoted.
- Cal. Ins. Code 790.06, and Moradi-Shalal v. Fireman's Fund Insurance Companies, 46 Cal.3d 287 (1988), law.justia.com/cases/california/supreme-court/3d/46/287.html. Read in the earlier pass, described here and not quoted.
- 15 O.S. 955 (Laws 1991, c. 161, Sec. 5, eff. Sept. 1, 1991), both hosts read on 2026-09-05: law.justia.com/codes/oklahoma/title-15/section-15-955/ and www.oscn.net/applications/oscn/DeliverDocument.asp?CiteID=66322, the Oklahoma State Courts Network. The Act's section list, which places enforcement in 956, was read the same day at www.oscn.net/applications/oscn/Index.asp?ftdb=STOKST15&level=1. The Oklahoma Senate PDF that returned fabricated text on 2026-09-04 was not used and is not cited.
- NAIC, After Market Parts Model Regulation (MO-891, adopted 1987), read on 2026-09-04: content.naic.org/sites/default/files/model-law-891.pdf
- ALEC, After-Market Crash Parts Act, read on 2026-09-04: alec.org/model-policy/after-market-crash-parts-act/ (single host, ALEC's own)
Corrections
This page was published on 2026-09-05. Corrections are recorded here with the date, the wording they replaced, and the reason. Editing done before publication is not a correction and is not recorded here.
2026-09-05: Oklahoma added, and the reason it had been excluded. This page previously quoted no Oklahoma statutory text at all. It said: "No Oklahoma statutory text is quoted anywhere on this page. An Oklahoma Senate PDF returned wholly fabricated text for 15 O.S. 955 on 2026-09-04, with a real but wrong session law citation attached, and the section could afterwards be read on one publisher only. One host is below this page's rule of two independent hosts, so Oklahoma is named as a gap and is not counted as a third state in the copying pattern." That reasoning was correct when it was written and is not withdrawn. The page now quotes 15 O.S. 955, gives Oklahoma a row in the comparison table and a section of its own, and states which duties in that section reach a repair facility and which do not. It changed because on 2026-09-05 the section was reached on two independent hosts, law.justia.com and www.oscn.net, and they agree word for word on the operative sentence and on both numbered paragraphs, differing only in the history note. The fabricated Oklahoma Senate PDF was not used and is not cited. The gap closed because a second host was reached, not because the first source was believed on a second reading. Oklahoma is still not counted as a third instance of the two-defined-terms copying test, because 15 O.S. 953 was not opened.
General consumer information: not legal, insurance, or financial advice. Requirements, coverage, and practices vary by state, policy, and manufacturer.