TSB 18-008-06 says:

NOTE: This bulletin applies to KJ vehicles equipped with a 2.8L engine (sales code ENR) built prior to January 01, 2006 (MDH 0110XX).


Are they refering to the build date of the vehicle or the engine? The note can be read either way. Do both the engine and the vehicle have their own MDH code, or is it only the vehicle that has an MDH code?