Steven Senne, Associated Press
A detail of the grill of a 2011 Chevrolet Cruze compact car, right, is seen near another Chevrolet Cruze, left, on the lot of a dealership, in Norwood, Mass., Tuesday, May 31, 2011. General Motors' is recalling its Chevrolet Cruze compact cars due to risks of engine fires.

DETROIT — The risk of engine fires is forcing General Motors to recall 475,000 Chevrolet Cruze compact cars.

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GM said Friday that the fires can ignite when fluids drip onto a plastic shield below the engine. GM knows of 30 fires caused by the problem. No injuries have been reported.

Dealers will cut the shield to let the fluid drain to the pavement. GM says most of the fires were caused by spills during oil changes that weren't cleaned properly. Cruzes with worn-out manual transmissions also can leak fluid.

The recall covers cars built from September of 2010 through May of 2012.

The Cruze is key because it has improved GM's small-car sales. The company has a history of poor-performing compacts.