NISSAN issued a recall on the ALTIMA model

On certain vehicles, if a sufficiently hot object (i.e. cigarette ash) enters the air filter housing through the engine fresh air intake system, the air filter may ignite. This could result in an underhood fire causing property damage and/or personal injury. Correction: Dealers will replace the air filter with a revised version possessing improved anti-flammability characteristics. In addition, an air deflector will be installed in front of the air intake opening to reduce the intake of debris.