What do the terms 16-Bit and 32-bit mean as it relates to Subaru ECUs?
Quite simply, some Subaru ECUs use a 16-Bit processor, whereas other, newer models use a 32-bit processor. It is important to differentiate between these two as they can have some noticeable differences in operation. Almost all of the 32-bit models have electronic throttle control, also known as drive-by-wire (DBW), whereas the 16-Bit models make use of the standard drive-by-cable (DBC) in which there a physical link between the throttle pedal and the throttle body.
