When did they change the honda pilot body style?
No context provided
Which model year did they change the honda pilot body style resulting in a 10% reduction in drag area?
2016
The 2012 model year introduced a redesigned front fascia, new alloy wheels, and updates to the interior along with changes to the bumper.
Which model year did they change the honda pilot body style resulting in new alloy wheels and redesigned front fascia?
2012
Honda Pilot
Honda revised the Pilot for the 2006 model year in October 2005. Changes to the exterior included a new fascia with a different grille insert and halogen projector headlights, and taillights with clear lenses. The EX trim level received redesigned wheels, and the original EX wheels were now found on the LX trim. On the inside, side airbags were provided in the C pillar, the gauge cluster was updated and the center console featured chrome trim and redesigned storage compartments and cup holders. For the 2006 model year, Honda added Variable Cylinder Management to the two-wheel-drive models. This VCM tech proved to be problematic in some cases, which led to a class action lawsuit for Honda Motor Co. 
Which model year did they change the honda pilot body style resulting in different grille insert and redesigned front fascia?
2006
Honda Pilot
No context provided
When did they change the honda pilot body style resulting in a 10% reduction in drag area?
February 2015 2015
Honda revised the Pilot for the 2006 model year in October 2005. Changes to the exterior included a new fascia with a different grille insert and halogen projector headlights, and taillights with clear lenses. The EX trim level received redesigned wheels, and the original EX wheels were now found on the LX trim. On the inside, side airbags were provided in the C pillar, the gauge cluster was updated and the center console featured chrome trim and redesigned storage compartments and cup holders. For the 2006 model year, Honda added Variable Cylinder Management to the two-wheel-drive models. This VCM tech proved to be problematic in some cases, which led to a class action lawsuit for Honda Motor Co. 
When did they change the honda pilot body style resulting in different grille insert and redesigned front fascia?
October 2005 2005
Honda Pilot
Honda Pilot
https://en.wikipedia.org/wiki/Honda%20Pilot
The Honda Pilot is a mid-size crossover SUV manufactured by Honda and introduced in 2002.
Honda Pilot
The Honda Pilot is a mid-size crossover SUV whose body style has been changed several times over many years. Changes made in model years 2005 and 2006 resulted in a different grille insert and a redesigned front fascia. In model year 2012, the body style change resulted in new alloy wheels and another redesigned front fascia. Changes made to the body style in model years 2015 and 2016 resulted in a 10% reduction in drag area.