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RAMOS ARIZPE, Mexico — In Mexico’s booming auto industry, the cars rolling off assembly lines may look identical, but how safe they are depends on where they’re headed.
Vehicles destined to stay in Mexico or go south to the rest of Latin America carry a code signifying there’s no need for antilock braking systems, electronic stability control, or more than two air bags, if any, in basic models.
If the cars will be exported to the United States or Europe, however, they must meet stringent safety laws, including as many as six to 10 air bags, and stability controls that compensate for slippery roads and other road dangers, say engineers who have worked in Mexico-based auto factories.
Because the prices of the two versions of the cars are about the same, the dual system buttresses the bottom lines of automakers such as General Motors and Nissan. But it’s being blamed for a surge in auto-related fatalities in Mexico, where laws require virtually no safety protections.
“We are paying for cars that are far more expensive and far less safe,” said Alejandro Furas, technical director for Global New Car Assessment Program, or NCAP, a vehicle crash-test group. “Something is very wrong.”
In 2011, nearly 5,000 drivers and passengers in Mexico died in accidents, a 58 percent increase since 2001, according to the latest available data from the country’s transportation department. Over the same decade, the United States reduced the number of auto-related fatalities by 40 percent. The death rate in Mexico, when comparing fatalities with the size of the car fleet, is more than 3.5 times that of the United States.
Nevertheless, Mexico hasn’t introduced any safety proposals other than general seat belt requirements for its 22-million- strong auto fleet. Even then, the laws don’t mandate three-point shoulder belts necessary to secure child safety seats.
Brazil and Argentina, on the other hand, have passed laws requiring all vehicles to have dual front air bags and antilock braking systems by next year.
An Associated Press investigation this year found that Brazil’s auto plants produce cars aimed at Latin American consumers that lack basic safety features. Like Brazil, Mexico doesn’t run its own crash test facility to assess cars’ safety before they hit the road.
Dr. Arturo Cervantes Trejo, director of the Mexican Health Ministry’s National Accident Prevention Council, said the country has a long way to go to upgrade safety standards, but challenging the nation’s $30 billion auto industry could be difficult.
“It’s a complicated subject because of the amount of money carmakers bring to this country. The economy protects them,” Mr. Cervantes said. “But there are plans, there is a strategy. We have a working group with the car industry.”
Auto plants cover a swath of central Mexico, cranking out about 3 million cars a year while lifting into the middle class auto hubs in the states of Aguascalientes and Puebla. In a matter of a few years, Mexico has become the world’s fourth biggest auto exporter, despite having no homegrown brands, and the country’s car fleet doubled between 2001 and 2011, the latest national figures show.
But consumers in “first-world” countries are paying the same or even less than their Mexican counterparts for safer cars.
For example, basic versions of Mexico’s second most popular car, the Nissan Versa, made in central Aguascalientes, come with two air bags, but without electronic stability control systems, which use sensors to activate brakes when a car loses control.
The sticker price of the newer generation of the sedan comes to $16,000.
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The U.S. version of the same car has six air bags in the front, on the sides and mounted in the roof, in addition to an electronic stability control system. That sticker price is about $14,000.
Similarly, the basic version of the Chevrolet Aveo, which has been revamped and renamed Sonic, sells for about $14,000 in the U.S. and comes with 10 air bags, antilock brakes, and traction control. Its Mexican equivalent, the country’s top-selling car, doesn’t have any of those protections and costs only $400 less.
Nissan Mexicana spokesman Herman Morfin said in a statement it is “common practice” to add different features, depending on the intended market.
“Because there are many choices of specifications and equipment, specific marketing strategies by country, in addition to the tax difference among countries, states and cities, also including transportation and delivery costs, it’s not possible to make a direct comparison among vehicles sold in each market, based on the list price published on the Web,” Mr. Morfin said.
While GM declined repeated requests to comment, an engineer who headed a manufacturing division at the company in Mexico until last year said the company saved on costs by not adding safety features.
“For the company to make more net profit and so that cars are sold at more affordable prices, we would toss aside some accessories.
Air bags, ABS brakes, those were the first to go,” the engineer said. He spoke on condition of anonymity, citing a confidentiality agreement with the company.
Three other engineers who worked with Nissan and GM for four years and are still involved in auto design for other carmakers were interviewed on similar conditions of anonymity, and they confirmed the companies built cars with vastly different safety features depending on where they would be sold.
The U.S. National Highway Traffic Safety Administration said air bags and electronic stability control have prevented tens of thousands of injuries in auto accidents and reduced fatal crashes by as much as a third in the United States.
Paco de Anda, the director of the Mexican chapter for the accident-prevention group Safe Kids, said Latin American consumers have to pay extra for those protections.
“Features that are already mandatory in other countries, here they are selling them as optional items,” Mr. De Anda said. “People here have no education about road safety ... so they don’t pay for it.”
A GM worker who gets paid $100 a week said people in Latin America cannot afford to buy cars that are fully loaded with safety features.
“We’re not first-world countries,” said the worker, who asked not to be identified because he was afraid of losing his job at the GM plant in the town of Ramos Arizpe.
Mr. Furas, of Global NCAP, said changing automaker behavior will require the region’s few watchdog groups and especially government regulators to apply far more pressure on automakers.
Volkswagen, for one, began adding two air bags to its Clasico model after the German carmaker learned that Latin NCAP was going to choose the car for crash testing because of its popularity, Mr. Furas said. The model sold in Europe and the U.S. as the Jetta comes standard with six air bags.
“Mexico has to take a good look at itself, at the problems it’s facing,” Furas said. “It is selling unsafe cars to its own people, when it can be selling safe cars that it can build.”