
Originally Posted by
oj88
There's a platform design defect on the previous gen Innova, Fortuner and Hilux. There's a significant amount of outside air that leaks into the cabin through the front A/C 'fresh air' vent and the rear body one-way vents (Innova and Fortuner). This was disclosed to me by my SA and would probably not go on record with that.
Anyway, I fixed mine by taping as many holes I can find under the rear bumper and covered up the front inlet air vents located under the wiper cowl. I always keep the A/C in recirculate anyway. Since then the front A/C has been recirculating 100% cabin air and I can no longer smell the exhaust gases from vehicles in front of me.
In the rear however, I can still discern outside exhaust air entering the rear A/C. I might try using spray foam to isolate the A/C blower so it will only recirculate interior air. Tintamad pa ako baklasin yung rear interior side panel as it required a bit of elbow grease.
If you've owned any of the cars I mentioned for at least several months, you'll notice that the interior panels would have a thin film of black soot (or libag). That's too much outside air entering the vents and settling down on the interior panels and upholstery. I know that this is not normal because I've owned an '08 Civic before this and right up to the point I sold it last year, the interior looks pristine.