This engine-mounted heater raises the temperature of the intake air before it enters the combustion chambers. It is installed in the intake tract between the air filter and the intake manifold. The heater element activates during cold starts to improve fuel atomization and reduce white smoke. A failed heater causes hard starting in low ambient temperatures and may trigger a fault code in the engine management system. The original component matches the electrical resistance and mounting geometry of the factory assembly, ensuring correct current draw and sealing against the intake duct.