The first
1978 · Mercedes-Benz S-Class W116
The W116 S-Class was the first production car with electronic ABS, developed jointly by Bosch and Mercedes after almost a decade of failed analogue prototypes. It was a £900 option in 1978 — about £5,500 in today's money — and it was sold as a solution to a problem most drivers didn't really know they had: the loss of steering control in an emergency stop.
It worked. Press demonstrations of the W116 included slamming the brakes mid-corner on a wet skidpan and watching the car continue to track around the corner instead of ploughing straight on. Nothing else on sale could do that.
What's worth understanding is how long Bosch had been trying. The first Bosch patent for a wheel-speed-modulated brake was filed in 1936. A working analogue prototype existed by 1970. The blocker for the next eight years was solid-state electronics — specifically, a small enough microcontroller that could process the wheel-speed signals fast enough (every few milliseconds) to actually modulate the brake pressure usefully. The Intel 8048 microcontroller, released in 1976, was the first chip cheap enough and fast enough to do the job in a production car. The W116 ABS launched two years later.
The slow march to standard
ABS spread upmarket first. BMW added it to the 7 Series in 1981. Ford put it on the Granada Scorpio in 1985 — the first time a non-luxury European car had it as standard. Volvo and Saab adopted it across most ranges by the late 1980s, in keeping with their safety-first marketing.
Below the executive segment, take-up was slow. Through the 1990s ABS was usually optional or trim-restricted. The Ford Fiesta didn't get it as standard until 2000. The Vauxhall Corsa held out until 2003. Even within Volkswagen Group, the basic Polo and Lupo were sold without ABS into the early 2000s on cost grounds.
The reason was money. ABS hardware in the early 1990s cost manufacturers around £200-300 per car at fleet pricing — a meaningful chunk of margin on a £6,000 supermini. Until the Bosch ABS 5.3 generation arrived in 1995 and brought the cost below £100 per car, it was financially difficult to justify standard fitment on cheaper cars. By the end of the 1990s the cost had collapsed further as more sensor and pump suppliers entered the market, but by then the regulators were closing in anyway.
ABS took twenty-five years to reach the Polo. It took the EU another five to make it compulsory.
The version that made it stick
2007 · European Union Regulation (EC) No 78/2009
ABS became a legal requirement on all new passenger cars sold in the EU under regulation 78/2009, with a phase-in completed by 2007. Forty years from option to standard. The US followed in 2013 under FMVSS 126, though by that point it was effectively unavoidable: ESP, which became mandatory at the same time, requires ABS as a foundation.
Australia mandated ABS in 2003. Japan, despite domestic manufacturers leading on it, only made it compulsory for new car types in 2010. India waited until 2019. The international rollout of ABS was so prolonged that the first generation of cars that had ABS as standard from new are now, in 2026, 35-year-old classics.
What ABS actually changed
The numbers are clean. ABS reduced fatal frontal collisions in wet conditions by roughly 25% in the studies that followed mass adoption. It didn't shorten stopping distances on dry tarmac — in fact on loose surfaces (gravel, snow) ABS often increases stopping distance, because a locked wheel piles up material in front of itself. What ABS bought was steering. You could brake and steer at the same time, every time. That single change was probably the most important piece of active safety engineering between the seatbelt and the airbag.
The cultural shift took longer. Through the 1980s and into the 1990s, driving instructors still taught cadence braking — pumping the pedal to mimic ABS — because most learner cars didn't have it. It wasn't until the late 1990s that learners could assume the car they passed their test in had it. The DSA didn't formally update the UK driving syllabus to "press the pedal hard and steer; the ABS will manage modulation" until 2003.
There's a counterintuitive secondary effect that road-safety researchers spent the 1990s arguing about: risk compensation. Drivers with ABS, in some studies, drove faster, followed closer, and braked later — partially negating the safety gain. The Munich taxi study (1994) is the most-cited: half a fleet of Munich cabs were equipped with ABS, half weren't, and the ABS-equipped half had statistically indistinguishable accident rates over four years. The drivers had simply driven harder. Whether risk compensation eats most or just some of the engineering gains has never been fully resolved, but it's the reason no one promotes ABS as a "drive worse, you'll be fine" technology.
The next thing it enabled
ABS turned out to be the gateway drug. Once you have wheel-speed sensors at all four corners and a pump that can release brake pressure independently, you can also build:
- Traction control (slowing a spinning driven wheel so the differential redirects torque to the wheel with grip) - Electronic stability control (selectively braking individual wheels to correct understeer or oversteer) - Hill-hold (maintaining brake pressure for two seconds after the foot lifts) - Adaptive cruise braking (the cruise system can apply the brakes, not just throttle) - Brake assist (recognising panic-stop pedal velocity and pre-pressurising the system) - Autonomous emergency braking (the radar can apply the brakes without the driver's foot)
Almost every active-safety system on a modern car descends from the same plumbing Bosch laid down in 1978. The current Bosch IPB (Integrated Power Brake), used on most premium cars from 2020, is essentially a fifth-generation ABS pump that no longer needs a vacuum servo, can decouple the pedal from the calipers entirely (useful for one-pedal driving in EVs), and contains the full stability-control logic in firmware.
That's the unglamorous truth of the W116 S-Class. The reason your 2026 supermini doesn't go off a wet roundabout isn't the seatbelt, the airbag, or the crumple zone. It's a German hydraulic pump that was forty years in the making.
A note on the brake-by-wire future
ABS as we know it has a successor problem. Modern EVs use regenerative braking — the motor itself slows the car. On most current EVs, the brake pedal first triggers regenerative braking and only engages the friction brakes when more deceleration is needed than the motor can provide. That blending is done by the ABS hardware, but it's a fundamentally different problem to "stop the wheel locking up under hard braking."
The Mercedes EQS (2021), Tesla Model S Plaid (2021), and Lucid Air (2021) all ship with brake-by-wire systems where there's no mechanical link between the pedal and the calipers under normal conditions — the pedal is a position sensor, the firmware decides what to do, and the friction brakes are only used as a backup. ABS is still in there, but it's now part of a much larger software stack.
The 1978 Mercedes engineers would recognise about 20% of what's in a 2026 brake system. The other 80% — the regen blending, the AEB integration, the brake-by-wire, the pedal-feel emulation — exists because of capabilities that ABS made possible, not because ABS itself was the answer.