On deck is my sophomore engineering hopeful and I know nothing about requirements. He asked me to "find out" whether he needs BC Calc to apply to a "reputable" engineering program (and/or as lab science major)- not Harvey Mudd but maybe UC's, Ivy's or strong LAC with engineering. Though he is a sophomore, he is scheduling junior year classes, and is deciding between "advanced pre-calc" and "honors pre-calc"-- advanced lands seniors in AB and honors (usually) lands kids in BC. More than 1/2 of the kids drop out of honors pre-calc at our public high school, it's a brutal class. For reference, son is in all honors classes, including a 4 year engineering curriculum. He currently has about a 3.9 UW and a 4.6 W. One B in HS was just earned in Trig H. He likes math, but it does not come as easily as other classes.
IF AB is enough (even at a school that offers BC) that would be awesome to know. He will also have 4 years of honors classes, including math, science (including APs) and engineering.