Question: Will changing the exhaust system void my factory warranty?

Answer: NO. It's also illegal for a dealer to deny you the OE warranty because you have changed the exhaust system. This is an often asked question. But you will need to be armed with some basic information.

Under the Magnuson Moss Warranty Act of 1975, 15 USC, 2302 and Clean Air Act 42 of USA code 7541, you have rights.

This legislation basically states that:

In order for a dealer/manufacturer to deny a warranty on a claimed part, they must PROVE that the part YOU installed/had installed DIRECTLY caused the failure of the part on which you’re claiming the warranty.

If your vehicle manufacturer fails to honor emission/warranty claims, contact EPA at (202) 260-2080 or www.epa.gov.  If federal warranty protection is denied, contact the FTC at (202) 326-3128 or www.ftc.gov.  For additional information, check out the following links:


Here is the Magnuson-Moss Warranty Act of 1975.


US Code - Title 15, Chapter 50, Sections 2301-2312

 Section 2301. Definitions

(1) The term "consumer product" means any tangible personal property which is distributed in commerce and which is normally used for personal, family, or household purposes (including any such property intended to be attached to or installed in any real property without regard to whether it is so attached or installed).

(2) The term "Commission" means the Federal Trade Commission.

(3) The term "consumer" means a buyer (other than for purposes of resale) of any consumer product, any person to whom such product is transferred during the duration of an implied or written warranty (or service contract) applicable to the product, and any other person who is entitled by the terms of such warranty (or service contract) or under applicable State law to enforce against the warrantor (or service contractor) the obligations of the warranty (or service contract).

(4) The term "supplier" means any person engaged in the business of making a consumer product directly or indirectly available to consumers.

(5) The term "warrantor" means any supplier or other person who gives or offers to give a written warranty or who is or may be obligated under an implied warranty.

(6) The term "written warranty" means -


(A) any written affirmation of fact or written promise made in connection with the sale of a consumer product by a supplier to a buyer which relates to the nature of the material or workmanship and affirms or promises that such material or workmanship is defect free or will meet a specified level of performance over a specified period of time, or

(B) any undertaking in writing in connection with the sale by a supplier of a consumer product to refund, repair, replace, or take other remedial action with respect to such product in the event that such product fails to meet the specifications set forth in the undertaking, which written affirmation, promise, or undertaking becomes part of the basis of the bargain between a supplier and a buyer for purposes other than resale of such product.

(7) The term "implied warranty" means an implied warranty arising under State law (as modified by sections 2308 and 2304(a) of this title) in connection with the sale by a supplier of a consumer product.

(8) The term "service contract" means a contract in writing to perform, over a fixed period of time or for a specified duration, services relating to the maintenance or repair (or both) of a consumer product.

(9) The term "reasonable and necessary maintenance" consists of those operations

(A) which the consumer reasonably can be expected to perform or have performed and

(B) which are necessary to keep any consumer product performing its intended function and operating at a reasonable level of performance.

(10) The term "remedy" means whichever of the following actions the warrantor elects:

(A) repair,

(B) replacement, or

(C) refund;

except that the warrantor may not elect refund unless (i) the warrantor is unable to provide replacement and repair is not commercially practicable or cannot be timely made, or (ii) the consumer is willing to accept such refund.

(11) The term ''replacement'' means furnishing a new consumer product which is identical or reasonably equivalent to the warranted consumer product.

(12) The term "refund" means refunding the actual purchase price (less reasonable depreciation based on actual use where permitted by rules of the Commission).

(13) The term "distributed in commerce" means sold in commerce, introduced or delivered for introduction into commerce, or held for sale or distribution after introduction into commerce.

(14) The term "commerce" means trade, traffic, commerce, or transportation -

(A) between a place in a State and any place outside thereof,
(B) which affects trade, traffic, commerce, or transportation described in subparagraph (A).

(15) The term "State" means a State, the District of Columbia, the Commonwealth of Puerto Rico, the Virgin Islands, Guam, the Canal Zone, or American Samoa. The term "State law" includes a law of the United States applicable only to the District of Columbia or only to a territory or possession of the United States; and the term "Federal law'" excludes any State law.

Section 2302. Rules governing contents of warranties


    (a) Full and conspicuous disclosure of terms and conditions; additional requirements for contents In order to improve the adequacy of information available to consumers, prevent deception, and improve competition in the marketing of consumer products, any warrantor warranting a consumer product to a consumer by means of a written warranty shall, to the extent required by rules of the Commission, fully and conspicuously disclose in simple and readily understood language the terms and conditions of such warranty. Such rules may require inclusion in the written warranty of any of the following items among others:

(1) The clear identification of the names and addresses of the warrantors.

(2) The identity of the party or parties to whom the warranty is extended.

(3) The products or parts covered.

(4) A statement of what the warrantor will do in the event of a defect, malfunction, or failure to conform with such written warranty - at whose expense - and for what period of time.

(5) A statement of what the consumer must do and expenses he must bear.

(6) Exceptions and exclusions from the terms of the warranty.

(7) The step-by-step procedure which the consumer should take in order to obtain performance of any obligation under the warranty, including the identification of any person or class of persons authorized to perform the obligations set forth in the warranty.

(8) Information respecting the availability of any informal dispute settlement procedure offered by the warrantor and a recital, where the warranty so provides, that the purchaser may be required to resort to such procedure before pursuing any legal remedies in the courts.

(9) A brief, general description of the legal remedies available to the consumer.

(10) The time at which the warrantor will perform any obligations under the warranty.

(11) The period of time within which, after notice of a defect, malfunction, or failure to conform with the warranty, the warrantor will perform any obligations under the warranty.

(12) The characteristics or properties of the products, or parts thereof, that are not covered by the warranty.

(13) The elements of the warranty in words or phrases which would not mislead a reasonable, average consumer as to the nature or scope of the warranty.

    (b) Availability of terms to consumer; manner and form for presentation and display of information; duration; extension of period for written warranty or service contract


        (A) The Commission shall prescribe rules requiring that the terms of any written warranty on a consumer product be made available to the consumer (or prospective consumer) prior to the sale of the product to him.

        (B) The Commission may prescribe rules for determining the manner and form in which information with respect to any written warranty of a consumer product shall be clearly and conspicuously presented or displayed so as not to mislead the reasonable, average consumer, when such information is contained in advertising, labeling, point-of-sale material, or other representations in writing.

      (2) Nothing in this chapter (other than paragraph (3) of this subsection) shall be deemed to authorize the Commission to prescribe the duration of written warranties given or to require that a consumer product or any of its components be warranted.

      (3) The Commission may prescribe rules for extending the period of time a written warranty or service contract is in effect to correspond with any period of time in excess of a reasonable period (not less than 10 days) during which the consumer is deprived of the use of such consumer product by reason of failure of the product to conform with the written warranty or by reason of the failure of the warrantor (or service contractor) to carry out such warranty (or service contract) within the period specified in the warranty (or service contract).

    (c) Prohibition on conditions for written or implied warranty; waiver by Commission No warrantor of a consumer product may condition his written or implied warranty of such product on the consumer's using, in connection with such product, any article or service (other than article or service provided without charge under the terms of the warranty) which is identified by brand, trade, or corporate name; except that the prohibition of this subsection may be waived by the Commission if -

      (1) the warrantor satisfies the Commission that the warranted product will function properly only if the article or service so identified is used in connection with the warranted product, and

      (2) the Commission finds that such a waiver is in the public interest. The Commission shall identify in the Federal Register, and permit public comment on, all applications for waiver of the prohibition of this subsection, and shall publish in the Federal Register its disposition of any such application, including the reasons therefor.

    (d) Incorporation by reference of detailed substantive warranty provisions
    The Commission may by rule devise detailed substantive warranty provisions which warrantors may incorporate by reference in their warranties.

    (e) Applicability to consumer products costing more than $5
    The provisions of this section apply only to warranties which pertain to consumer products actually costing the consumer more than $5.

Section 2303. Designation of written warranties

    (a) Full (statement of duration) or limited warranty
    Any warrantor warranting a consumer product by means of a written warranty shall clearly and conspicuously designate such warranty in the following manner, unless exempted from doing so by the Commission pursuant to subsection (c) of this section:

      (1) If the written warranty meets the Federal minimum standards for warranty set forth in section 2304 of this title, then it shall be conspicuously designated a ''full (statement of duration) warranty''.

      (2) If the written warranty does not meet the Federal minimum standards for warranty set forth in section 2304 of this title, then it shall be conspicuously designated a "limited warranty".

    (b) Applicability of requirements, standards, etc., to representations or statements of customer satisfaction
    This section and sections 2302 and 2304 of this title shall not apply to statements or representations which are similar to expressions of general policy concerning customer satisfaction and which are not subject to any specific limitations.

    (c) Exemptions by Commission
    In addition to exercising the authority pertaining to disclosure granted in section 2302 of this title, the Commission may by rule determine when a written warranty does not have to be designated either ''full (statement of duration)'' or ''limited'' in accordance with this section.

    (d) Applicability to consumer products costing more than $10 and not designated as full warranties
    The provisions of subsections (a) and (c) of this section apply only to warranties which pertain to consumer products actually costing the consumer more than $10 and which are not designated "full (statement of duration) warranties".

Section 2304. Federal minimum standards for warranties

    (a) Remedies under written warranty; duration of implied warranty; exclusion or limitation on consequential damages for breach of written or implied warranty; election of refund or replacement. In order for a warrantor warranting a consumer product by means of a written warranty to meet the Federal minimum standards for warranty -

      (1) such warrantor must as a minimum remedy such consumer product within a reasonable time and without charge, in the case of a defect, malfunction, or failure to conform with such written warranty;

      (2) notwithstanding section 2308(b) of this title, such warrantor may not impose any limitation on the duration of any implied warranty on the product;

      (3) such warrantor may not exclude or limit consequential damages for breach of any written or implied warranty on such product, unless such exclusion or limitation conspicuously appears on the face of the warranty; and

      (4) if the product (or a component part thereof) contains a defect or malfunction after a reasonable number of attempts by the warrantor to remedy defects or malfunctions in such product, such warrantor must permit the consumer to elect either a refund for, or replacement without charge of, such product or part (as the case may be). The Commission may by rule specify for purposes of this paragraph, what constitutes a reasonable number of attempts to remedy particular kinds of defects or malfunctions under different circumstances. If the warrantor replaces a component part of a consumer product, such replacement shall include installing the part in the product without charge.

    (b) Duties and conditions imposed on consumer by warrantor

      (1) In fulfilling the duties under subsection (a) of this section respecting a written warranty, the warrantor shall not impose any duty other than notification upon any consumer as a condition of securing remedy of any consumer product which malfunctions, is defective, or does not conform to the written warranty, unless the warrantor has demonstrated in a rulemaking proceeding, or can demonstrate in an administrative or judicial enforcement proceeding (including private enforcement), or in an informal dispute settlement proceeding, that such a duty is reasonable.

      (2) Notwithstanding paragraph (1), a warrantor may require, as a condition to replacement of, or refund for, any consumer product under subsection (a) of this section, that such consumer product shall be made available to the warrantor free and clear of liens and other encumbrances, except as otherwise provided by rule or order of the Commission in cases in which such a requirement would not be practicable.

      (3) The Commission may, by rule define in detail the duties set forth in subsection (a) of this section and the applicability of such duties to warrantors of different categories of consumer products with ''full (statement of duration)'' warranties.

      (4) The duties under subsection (a) of this section extend from the warrantor to each person who is a consumer with respect to the consumer product.

    (c) Waiver of standards
    The performance of the duties under subsection (a) of this section shall not be required of the warrantor if he can show that the defect, malfunction, or failure of any warranted consumer product to conform with a written warranty, was caused by damage (not resulting from defect or malfunction) while in the possession of the consumer, or unreasonable use (including failure to provide reasonable and necessary maintenance).

    (d) Remedy without charge
    For purposes of this section and of section 2302(c) of this title, the term ''without charge'' means that the warrantor may not assess the consumer for any costs the warrantor or his representatives incur in connection with the required remedy of a warranted consumer product. An obligation under subsection (a)(1)(A) of this section to remedy without charge does not necessarily require the warrantor to compensate the consumer for incidental expenses; however, if any incidental expenses are incurred because the remedy is not made within a reasonable time or because the warrantor imposed an unreasonable duty upon the consumer as a condition of securing remedy, then the consumer shall be entitled to recover reasonable incidental expenses which are so incurred in any action against the warrantor.

    (e) Incorporation of standards to products designated with full warranty for purposes of judicial actions
    If a supplier designates a warranty applicable to a consumer product as a ''full (statement of duration)'' warranty, then the warranty on such product shall, for purposes of any action under section 2310(d) of this title or under any State law, be deemed to incorporate at least the minimum requirements of this section and rules prescribed under this section.