Top 3 volume production cars (1 million+) in 2006 were

Toyota Corolla (Axio, Fielder, Runx, Verso, Spacio, Matrix, Altis)/Allex/Auris/Blade/Tazz): 1.5 million,
VW Golf/Jetta/Bora/Rabbit/GTI/GLI/Sagitar/Touran: 1.4 million,
Ford Focus (C-Max): 1.0 million.

Toyota Corolla was built in Brazil (also Corolla Fielder), Canada (also Corolla Matrix), Britain, India, Japan (also Allex/Auris/Blade and Corolla Axio, Runx, Fielder and Spacio), Malaysia, Pakistan, Philippines, Taiwan, Thailand (Corolla Altis), China, Turkey (also Corolla Verso and Fielder), USA, South Africa (also Tazz, RunX) and Venezuela.

VW Golf was built in Belgium, Brazil, China (also Jetta, Bora, Sagitar, Touran), Germany (also Touran, Rabbit, GTI), Mexico (also Jetta, Bora, GLI), and South Africa (also Jetta).

Ford Focus was built in Germany (also Focus C-Max), Italy, Spain, Russia, USA, Argentina, China, Philippines, and South Africa.