In 1908, Henry Ford introduced the Model T and changed the relationship between Americans and their machines. The car was revolutionary not because it was fast or beautiful, but because it was simple. Ford designed it so a farmer in rural Kansas with no formal mechanical training could take it apart and put it back together with basic hand tools. The engine had four cylinders, the transmission two forward speeds and one reverse, and the ignition did not even need a battery.
Ford published detailed repair manuals, standardized parts so replacements could be ordered from a catalog, and encouraged owners to do their own maintenance. The philosophy was democratic: if ordinary people could own, operate, and repair their own vehicles, it would change the power structure of American life. For decades, that philosophy held. Through the 1920s, the wartime 1940s, and the post-war boom, the American car remained a machine its owner could understand.
Engines grew bigger and bodies more stylish, but the logic did not change. Combustion engine, mechanical linkages, analog gauges, physical connections between the driver’s inputs and the car’s responses. When you pressed the gas pedal, a cable pulled the throttle open. No software mediated that interaction.
But beneath the surface of that golden age, something was happening that would eventually destroy the culture of repairability Ford had built. It started at Ford’s greatest rival. In 1923, Alfred Sloan took over General Motors and brought an idea that reshaped the entire philosophy of American consumerism. Sloan looked at the Model T, which had barely changed in fifteen years, and saw an opportunity.
Instead of building a car that lasted forever, why not build one people wanted to replace because it looked old? He created the annual model change, changing styling just enough each year to make last year’s model feel dated, and built a ladder of brands from Chevrolet up to Cadillac so customers would buy their way up as they earned more. Critics would call it planned obsolescence. The mechanical guts of one year’s Chevrolet and the next were often nearly identical; it was the sheet metal and chrome that changed.
But the psychological precedent was enormous. The industry was no longer selling transportation. It was selling dissatisfaction, teaching consumers that the car they already owned was somehow not good enough. Through the mid-20th century, cars remained mechanically simple even as their exteriors grew elaborate.
The great muscle cars of the 1960s and early 1970s, the Mustangs, Camaros, and GTOs, were monuments to brute mechanical force. Big-block V8s with pushrods you could adjust by hand. Carburetors you could rebuild on the kitchen table with a thirty-dollar kit. Distributor caps you could swap in a parking lot with a screwdriver.
The engine bays were so spacious you could see the ground beneath the motor. Every bolt was accessible, every hose traceable. The aftermarket parts industry exploded, and auto parts stores were community institutions where the man behind the counter knew your car and your name. A working-class family could keep a ten-year-old sedan on the road almost indefinitely because the cost of repair was proportional to the cost of the car itself.
But by the late 1960s, the American car collided with two forces that began its transformation. The first was safety regulation. The second was emissions control. In 1966, Congress passed the National Traffic and Motor Vehicle Safety Act, followed in 1970 by the Clean Air Act.
New standards for crash protection and exhaust emissions forced cars to get more complicated. Catalytic converters were added, exhaust gas recirculation valves bolted on, and vacuum-operated emission controls turned engine bays into spaghetti bowls of rubber hoses. Then, in the late 1970s and early 1980s, the most consequential change arrived: the computer. Electronic fuel injection began replacing carburetors in American cars during the early 1980s.
Even the earliest systems introduced a fundamental shift. For the first time, there was a component under the hood you could not diagnose with your eyes, ears, or hands. You needed a specialized tool to read the codes it generated, and those tools were proprietary. Each manufacturer had its own diagnostic system, its own connector, its own software.
A tool that worked on a Ford was useless on a Chevrolet. The average car owner was being pushed out of the repair process, not because repairs were necessarily harder, but because diagnosis was hidden behind a language only the manufacturer could speak. In 1996, a standardized system called OBD-II was mandated for all cars sold in the United States. It created a universal diagnostic port and a standardized set of trouble codes any scanner could read.
In theory, it was a step toward transparency. But OBD-II only standardized a small portion of the diagnostic data. The basic emissions-related codes were accessible to everyone; the deeper, manufacturer-specific codes involving transmission behavior, airbag modules, body control units, and dozens of other subsystems remained proprietary. The manufacturers kept the keys to the deeper levels of the car’s brain.
By the 2010s, the average new car contained between thirty and fifty electronic control units. By the mid-2020s, that number climbed to between sixty and 150. They control the transmission, brakes, steering, suspension, climate control, infotainment, driver assistance systems, keyless entry, tire pressure monitoring, cameras, and even the seats. Every one of those systems generates data, every one can malfunction, and increasingly every one requires manufacturer-specific tools and software to diagnose and repair.
Modern engine bays are designed by computer-aided drafting software to maximize assembly efficiency, not access. Components are layered in sub-assemblies meant to be bolted together by robots and lowered into the chassis as a single unit. Changing a spark plug can require removing the intake manifold. Replacing a headlight bulb can mean dismantling part of the front bumper.
This is where the story stops being about engineering and starts being about money. The more complex a car becomes, the more dependent the owner is on the dealer network, and the dealer network is a profit center. Independent repair shops began finding themselves locked out, not for lack of skill, but because they could not access the software needed to complete the repair. A simple job like replacing a windshield on a car with a forward-facing camera requires camera recalibration after the glass is installed, and that recalibration requires a dealer-level diagnostic tool and a manufacturer-authorized software login.
A job that used to cost a few hundred dollars now costs over a thousand, and a significant portion goes to paying for access to the manufacturer’s digital ecosystem. Every fender bender and cracked windshield now triggers a cascade of electronic recalibrations only authorized technicians with authorized software can perform. In recent years, automakers have gone further. BMW charged a monthly fee to activate heated seats whose coils were already physically embedded in the seat cushions.
Mercedes-Benz charged an annual fee to unlock additional horsepower from electric motors that were already installed. Toyota and General Motors placed basic remote start functions behind subscriptions. Mazda locked its remote start behind a paid connected-services package. The car you purchase is no longer fully yours.
It is a platform, and the features on that platform can be turned on or off at the manufacturer’s discretion based on whether you continue to pay. Industry analysts project connected car services could generate tens of billions of dollars in annual revenue by 2030. Every new software layer and subscription gate is another barrier between you and the machine in your driveway. The erosion of repairability is also a labor story.
According to the TechForce Foundation, demand for new automotive technicians in 2021 was roughly 258,000, while the supply of new entrants was about 101,000, a gap of over 150,000 workers that has only widened. The workforce is aging out. The average wage for an automotive technician runs about 20 percent below the national average for all occupations. The tools required for modern diagnostics cost tens of thousands of dollars, and the knowledge base now includes computer networking, software diagnostics, sensor calibration, and high-voltage battery systems.
Meanwhile, the cost of motor vehicle maintenance and repair in the United States rose over 43 percent between January 2019 and January 2025, and the share of vehicles deemed total losses after accidents rose from 19 percent in 2018 to 27 percent in 2023. Insurance companies found it cheaper to write cars off than repair them. A movement has grown to push back. In 2012, Massachusetts passed the first right to repair act, requiring manufacturers to sell owners and independent shops the same diagnostic information made available to authorized dealers.
In 2020, voters approved an amendment extending the law to wireless telematics data. In 2023, Maine voters supported a similar measure. A bipartisan federal bill called the REPAIR Act was introduced in 2023, gained more than fifty co-sponsors from both parties, and by mid-2026 the House Energy and Commerce Committee advanced it. The bill would guarantee owners and independent shops access to software and diagnostic tools, protect consumer choice, prevent manufacturers from using software locks to create monopolies over repair services, and give the Federal Trade Commission authority to enforce compliance.
According to the Alliance for Automotive Innovation, 75 percent of post-warranty repair work already takes place at independent shops. Without legislation, that will not remain possible as cars become even more software-dependent. A former General Motors engineer described the industry’s deliberate pathway toward planned obsolescence in its most aggressive form. Automakers noticed a growing segment of the market was willing to lease a new car every three to five years, and the number of adults willing to service their own vehicles was declining.
The industry leaned into both trends. They made cars harder to service, incentivized leasing, and designed major components to be effectively disposable, lasting just long enough for the lease period or warranty. By 2010, the industry was implementing technologies that actively prevented user maintenance. Vehicles that could be serviced beyond 250,000 miles were being replaced by models designed to become economically unviable to repair after roughly 100,000 miles.
A European federation representing classic vehicle owners warned that cars from the 1980s, 1990s, and 2000s are at genuine risk of disappearing from the roads entirely, not because their engines are wearing out, but because their electronic control units are becoming impossible to source and repair. Some drivers are fighting back. A counter-movement deliberately seeks out pre-computer vehicles built before 2010 because those cars can still be maintained by their owners. Independent programmers have developed custom OBD-II software that can bypass factory paywalls.
About 30 percent of drivers said they would attempt a self-repair in 2024, up from 26 percent in 2020. But individual action is not enough to reverse a structural transformation decades in the making. Automakers have spent fortunes on lobbying to delay, weaken, or kill right to repair legislation, arguing that opening diagnostic systems would compromise safety and cybersecurity. Consumer advocates note the manufacturers already share this information with dealer networks, and the real motivation is the $1.
6 trillion global aftermarket they are desperate to reclaim through digital lockouts. The question is who gets to understand the machine. Ford believed understanding belonged to the owner, and for decades the industry followed that principle. When you cannot understand the machine, you cannot fix it.
When you cannot fix it, you must pay someone who can. When the only people who can fix it are authorized by the manufacturer, the manufacturer controls the price. The American car used to be a symbol of freedom: freedom of movement, freedom of self-reliance, freedom from dependence on anyone but yourself. Today it is becoming a subscription service on wheels, a rolling data collection platform that requires its maker’s permission every time something goes wrong.
The legislation is moving, public support is overwhelming, and the economic and environmental arguments are clear. But the corporations are powerful, and every new model year adds another layer of digital armor between the driver and the car they paid for. The fight is not just about cars.
It is about whether the things you buy actually belong to you.
