It depends how low that shield gets... it's just a piece of plastic - if you look above the brake pedal. Some of them are sagging down partially blocking the outlet down there - as reported earlier on these pages by someone else. I just happen to look there today and indeed it was sagging down to the extend that most air was blowing beyond and above that shield - not directly down on your feet. I guess some stay up and there is no problem - but - some hang down too low blocking the air flow. Mine was just a couple of inches above the brake pedal. In that position the hot air blows above it - not diretcly on your feet. Go and look at it and see for yourself! I am not making this stuff up, mind you....others reported elsewhere that this modification helped! It helped me!