Subaru Impreza Manuals 2011 Impreza Owner's Manual | Page 313

Driving tips exhaust fumes are entering the vehicle, have the problem checked and corrected as soon as possible. If you must drive under these conditions, drive only with all windows fully open. . Keep the trunk lid (4-door) or rear gate (5-door) closed while driving to prevent exhaust gas from entering the vehicle. Catalytic converter NOTE Due to the expansion and contraction of the metals used in the manufacture of the exhaust system, you may hear a crackling sound coming from the exhaust system for a short time after the engine has been shut off. This sound is normal. Turbo models 8-3 reduce HC, CO and NOx in exhaust gases, thus providing cleaner exhaust. To avoid damage t