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Of American-English origin, the colloquial phrase if it ain’t broke, don’t fix it (also if it ain’t broke, why fix it?) means: if something is successful, effective or not obviously defective, there is no need to change or replace it.
This phrase occurs, for example, in the following from The Press (York, Yorkshire, England) of Monday 10th June 2024 [page 9, column 5]—Bish and Chips is a fish-and-chip shop in York; Tom Gibbons is the manager:
Bish and Chips is one of 10 finalists in The Press ‘Best Chippy 2024’ awards.
[…]
When asked what Bish ‘n’ Chips did particularly well, Tom said: “That would be regular fish and chips, cooked in beef dripping, the traditional way, with a side of mushy peas.
“There’s no need for anything overly fancy on the menu—if it ain’t broke, don’t fix it.”
These are, in chronological order, the earliest occurrences of the phrase if it ain’t broke, don’t fix it (also if it ain’t broke, why fix it?) that I have found:
1-: From Combat Crew: Strategic Air Command (Offutt Air Force Base, Nebraska, USA) of May 1962 [page 10, title]:
IF IT AIN’T BROKE DON’T FIX IT
by MAJ. GEN. JAMES W. WILSON
Director of Material, SACThe title may be grammatically unsound but it refers to a maintenance program that has been proved sound over the past several months. This program, known as IMP (Improved Maintenance Program), calls for inspecting aircraft and allied equipment only where and when necessary.
—Note: Major General James W. Wilson’s article was reprinted in the Aerospace Accident and Maintenance Review (Norton Air Force Base, California, USA) of September 1962 [page 8, title].
2-: From Yellowstone’s bears kicked out of public trough for own good, by Leverett Richards, of The Oregonian staff, published in The Sunday Oregonian (Portland, Oregon, USA) of Sunday 10th August 1975 [page 13, column 6]:
The Park Service’s philosophy had long been expressed by one biologist in these words: “If it ain’t broke, don’t fix it.”
In other words, don’t tamper with nature.
Guided by this philosophy, the Yellowstone Park rangers years ago quit trying to manage the bison herd.
“Let nature do it,” the biologists urged. And nature did a better job than man ever did. The herd increased to about 1,000.
3-: From a transcript of the speech that Thomas R. Williams, President of the First National Bank of Atlanta, delivered on Monday 17th May 1976 at the Atlanta Rotary Club—transcript by Sam Hopkins, published in The Atlanta Constitution (Atlanta, Georgia, USA) of Tuesday 18th May 1976 [page 2-C, column 2]:
The bank official said that despite the fact that “our banking system and our system of bank regulation to protect the public has worked remarkably well . . . we hear a bombardment of criticism from certain politicians seeking change and power under the label of reform.”
He added, “There is an old Cajun saying that applies here: ‘If it ain’t broke, don’t fix it.’ Your banking system ‘ain’t broke,’ so do not permit irresponsible persons to trifle with a system that serves you well, lest they destroy it.”
4-: From Developers blast CBD zoning plan, by Patricia Gormin, published in The States-Item (New Orleans, Louisiana, USA) of Thursday 4th November 1976 [page A-3, column 1]—CBD stands for Central Business District, i.e., the downtown area of New Orleans; CPC stands for City Planning Commission:
The City Council […] must adopt its final plan for controlled growth of the Central Business District by Feb. 4, 1977, or forfeit the four years of hard work already invested in the project, according to CPC chief planner Bob Becker.
[…]
The ordinance currently in effect outlines five districts and is no longer practical as a blueprint for projected growth, according to Becker.
One opponent to the plan under study, Elmer Flanders, disagreed, however, and warned that “the machine ain’t broke; don’t fix it.”
5 & 6-: From transcripts of the comments that Thomas ‘Bert’ Lance (1931-2013), director-designate of the Office of Management and Budget, made at the Washington Press Club on Friday 17th December 1976:
5-: From a transcript by William Block, Jr., of The Blade Washington Bureau, published in The Blade (Toledo, Ohio, USA) of Saturday 18th December 1976 [page 2, column 6]—“the new administration” refers to the administration of President-elect Jimmy Carter (1924-2024):
[Thomas ‘Bert’ Lance] said that the new administration should not change things arbitrarily, citing the philosophy of a back-country Georgian—“if it ain’t broke, don’t fix it.” “We’ve been trying to change a lot of things that ain’t broke.”
6-: From a transcript by Jeffrey Antevil, of the Daily News Washington Bureau, published in the Daily News (New York City, New York, USA) of Saturday 18th December 1976 [page 8, column 2]:
[Thomas ‘Bert’ Lance] sprinkled his comments on the economy with a repertory of country humor. Expressing his skepticism at one point about proposals to restructure government programs which appear to be working fairly well, he said he would follow the advice of a North Georgia farmer: “If it ain’t broke, don’t fix it.”
7-: From a correspondence from Washington, District of Columbia, about Jimmy Carter’s first hundred days as President of the USA, by Raymond R. Coffey, of the Chicago Daily News, published in The Miami News (Miami, Florida, USA) of Saturday 30th April 1977 [page 5A, column 2]:
Carter plainly has no taste for revolution, social or otherwise. […]
This element in Carter’s approach to his job was perhaps most vividly expressed by Bert Lance, the president’s old banker friend from Calhoun, Ga., who is now head of the Office of Management and Budget and one of the most powerful men in the administration.
“If it ain’t broke, why fix it?” Lance asked rhetorically in a speech he gave here in the early days of the administration, and the earthy wisdom contained in that question seems now to be one of the standards on which the administration is operating.
