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The Camaro ZL1 is no normal car, so forget about fuel efficiency. Image Credit: Stefan Lindeque/ANM

Detroit: Ignition switches once again are causing problems for General Motors.

This time the company is recalling nearly 512,000 Chevrolet Camaro muscle cars from the 2010 to 2014 model years because a driver’s knee can bump the key and knock the switch out of the “run” position, causing an engine stall.

That disables the power steering and brakes and could cause drivers to lose control.

GM said Friday that it knows of three crashes and four minor injuries from the problem. A spokesman said the air bags did not go off in the crashes, but GM hasn’t determined if the nondeployment was caused by the switches.

GM said the Camaro switches met its specifications — unlike those at the centre of a recall of 2.6 million small cars. That problem has caused more than 50 crashes and at least 13 deaths.

Spokesman Alan Adler said the Camaro switches are completely different from those in the Chevy Cobalt and other small cars.

The Camaro key is concealed in the Fob like a switchblade. GM will replace it with a standard key, and a separate Fob. Adler said with the change, if the driver’s knee hits the Fob, it doesn’t come in contact with the key and the ignition can’t be turned.

GM said in a statement Friday that drivers who sit close to the steering column are most affected by the problem.

The problem was discovered during internal testing of ignition switches after the company recalled the switches in small cars such as the Chevrolet Cobalt and Saturn Ion earlier this year, GM said. GM knew for more than a decade that the small-car switches were faulty, yet didn’t recall them until early this year. The problem has brought federal investigations, lawsuits and a $35 million fine from the National Highway Traffic Safety Administration.

GM also announced three other recalls on Friday, bringing the total number of vehicles recalled by the company to about 14.4 million in the U.S. and 16.5 million in North America. Earlier this year GM passed its old U.S. full-year recall record of 10.75 million vehicles set in 2004.