In the industry there are things called “zero days”. These are issues known to the manufacturers before a good is marketed but which aren’t addressed for lack of time and/or funds.
Ford knew about the Pinto’s propensity for catching fire (and, much more damning, about the well known gearbox issues which caused even more fatalities) but, cynically, did the math and found it was just cheaper to keep on producing the car without alterations and settling the lawsuits as they came than recalling the hundreds of thousands of cars sold to 1977, when the issue came into open knowledge and NHTSA intervened. Following the First Oil Crisis Ford (like other US manufacturers) Ford saw sales of their big gass guzzling V6 and V8 plummet and, with the Japanese becoming more and more threatening, desperately needed the Pinto to stay in production, unchanged, to keep the factory doors open.
While superficially this may sound reasonable, Ford cannot be excused from a business point of view for its behavior.
First, selling a known defective products to customers is a sure way of ensuring they will never buy from you in the future. Just look at the sales of Honda’s and Toyota’s after the Pinto issues became public knowledge. In the second half of the '80s Ford came so close to going under due to their tarnished image they actually started fitting Yamaha engines and gearboxes to some of their Taurus models and advertising the fact. And as much as I hate saying this (because most people deserve only to be tied to a missile loaded with high explosive and shot at the Moon), the customer is one firm’s most valuable asset. Customers need to be kept happy: unless you have a government-sanctioned monopoly they can always go and buy from somebody else. They did so after the Pinto: they bought Honda’s and Toyota’s in huge numbers. Had Ford depended only on their US operations they would have required a government bailout (like Chrysler) or would have deservedly gone under because customers were dumping their products for the competition’s.
Second, Ford had a ready solution for replacing the Pinto: the Europe-only Cortina and Taunus, which were absolutely trouble-free and could be manufactured in the US no problem. Why Ford didn’t do this? Easy: old fashioned greed. Manufacturing a Taunus was more expensive than manufacturing a Pinto. US-only models tend to be considerably cheaper to manufacture than Europe-only models and much cheaper than Japan-only models. Why is that? The US market has many peculiarities but one stands up above all others: cars need to be cheap. Offering the Taunus at the same price as the Pinto would have cut into Ford’s profits (though they would have still made money on every car sold) and maintaining the same profit margin as in Europe would have meant raising the price too much.
Third, every company needs to have an image. Honda and Toyota, for example, are synonmous with unbelievable reliability and good value for money. Both companies will go to incredible lengths to preserve this image and, if possible, improve it. What image was Ford trying to build with the Pinto? “Yes, we know there’s a statistically unpleasant high chance the car will kill you but look how cheap it is!”.
Fourth, integrity. Soichiro Honda was well known for telling his employees they had to design vehicles they would want to drive/ride themselves. And being a crazy old man he is well known for having abused engineers and designers both verbally and physically when he discovered some defect which threatened his firm’s image and his customers’ satisfaction. Obviously the Ford management had a much more laidback attitude or, much more bluntly, they lacked integrity.