Induction Flush
aka marketing gimmick for cleaning the air intake. BS
Injection Flush
another marketing gimmick for cleaning the fuel injectors. Likely uneccessary @ 18k miles
EGR Flush (??)
EGR: Exhaust Gas Recirculation valve
A/C Tune Up
pfttt.. complete BS service
Power Steering Flush
Not needed at 18k miles
Brake Flush
Probably not needed at 18k miles but you should switch to a better brake fluid anyways. @30k is fine
Cooling System Flush
Probably not needed at 18k miles. @30k is fine
Auto Transmission Flush
n/a
J/K Synthetic Transmission Flush
Rear/Front Differential Flush
front n/a, Rear Probably not needed at 18k miles
Manual Transmission Flush
Probably not needed at 18k miles. @30k is fine
Transfer Case Service
n/a
The truth is, most of REQUIRED service is detailed in the manual. Of course, the dealer service rep only "Recommends" these services. Please don't fall for this crap. It's all mostly a bunch of gimmicks designed to basically steal your money. I've actually had them ask me if I wanted my tires rotated.
http://www.nissanusa.com/pdf/techpub...2010_N_SMG.pdf