Toyota claims a successful recall for models like the Camry involved in the sudden acceleration campaign - but perhaps a million vehicles will still never be repaired.

Perhaps a million or more Toyota owners have ignored a series of recalls due to potential defects that could lead their vehicles to unexpectedly accelerate out of control.

And that’s the good news.  Officials with the Japanese automaker brag that they have had one of the most successful recall campaigns ever to repair potentially sticky accelerator pedals and carpets that can become trapped beneath the throttle, convincing upwards of 80% of their owners to bring in vehicles covered by the unintended acceleration recall campaigns.  Most of the time, the response rate is significantly lower, often under 50%, according to industry officials.

And that’s a major problem cited by a new Government Accountability Office report that finds serious fault with the way recalls are conducted in the United States.  It reveals that many American motorists routinely ignore warnings of safety defects and as a result there are millions of vehicles on the road that have never undergone necessary repairs for problems that can, in many instances, be extremely serious.

Notices of safety campaigns are routinely ignored, said the report, so that, “Many recalled vehicles are never fixed, posing a risk to vehicle operators, other drivers, and pedestrians.”

The GAO investigation was ordered by Congress in the wake of last year’s problems at Toyota, which raised questions about how both the auto industry and government overseers are handling safety problems.

The problem with owners ignoring recalls may actually be getting worse despite – indeed, perhaps because of — industry and government efforts to improve automotive safety.  Manufacturers have come under increasing pressure to deal with potential problems – especially in the wake of the recent scandal at Toyota – and that resulted in the recall of more than 20 million vehicles in the U.S. last year.  That was the highest figure since 2004.  Millions more vehicles have already been recalled this year.

Some of the defects might be considered relatively minor and can be put on hold until an owner has the time to get to the repair shop, like the new recall involving defective Mazda windshield wipers, while others can prove more dangerous and immediate, such as one involving more than 1.2 million Ford F-Series pickups. A wiring problem could cause an airbag to unexpectedly ignite, causing an accident rather than protecting a driver in the event of a collision.

Why would a motorist risk driving around with such a serious defect?  While some of the blame might go to the auto industry, the GAO report focused on what industry and, in particular, the Department of Transportation can do to increase recall response rates.

The study says that using the National Highway Traffic Safety Administration’s website to publish recall notices is largely ineffective because few consumers either know of or use the site.

Meanwhile, though makers routinely send out notices to advise owners of new recalls, the GAO wants the message driven home by using “the word ‘urgent’ in large type to obtain readers’ attention.”  The agency also recommends that recall notices include the specific VIN number of an owner’s vehicle, rather than a vague statement of what vehicles might be covered by the recall.

NHTSA, meanwhile, should begin to use the data it and the automaker already collect to understand why motorists might ignore recalls and then see how to improve the response rates.

The government watchdog agency also wants to see the law changed to allow NHTSA to notify used car shoppers if the vehicle they’re buying has a defect.  Often, cars change hands without the new owners being aware of recalls – or knowing if the vehicles have actually had the necessary repairs completed.

Safety regulators have agreed to study the recommendations and find ways to implement them.

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