^Here you go my friend... post #10 on the FAQ stickie.
https://g35driver.com/forums/g35-sed...edan-faqs.html

Exterior
-Doggy Door
2003 was the only sedan with Doggy Door rear trunk lid. The Doggy Door is nicknamed that because it resembles one. The "INFINITI" is smaller and contained only on that part. It also contains the trunk release switch. The 03.5 and 04 do not have a trunk release on the back of the car. It was brought back on the 05-06 in the form of a button under the driver side tail light.
-03/04 Have the grid style tail lights 05/06 Have the twin circles
-Starting in 2003.5 HID headlights were offered
- All the body parts in front of the doors changed. They do not swap between 03/04 and 05/06 unless you change everything.
-The Hood now has a single line down the center and a slightly different shape
-The headlights are also slightly different on the outside and have a different bezel on the inside
-The grille is different
-The front bumper cover is different now painted all the way down with two larger openings on each side like the coupe
-The fenders are different to fit the new hood and headlights
-The side markers are the same
-The side skirts are now color matched
-The rear bumper cover is also color matched and is slightly more aggressive
-As mentioned above there is now a trunk release button under the driver side tail light.
-Different wheel style


Engine / Brakes / Suspension / Drivetrain
-2003-2004 (All Models) VQ35DE, Non Rev-UP 260hp/260lb-ft of torque
-2005-2006 (Automatic 5AT) VQ35DE Non Rev-Up 280hp/270lb-ft of torque
-2005-2006 (Manual 6MT) VQ35DE Rev-Up 298hp/260lb-ft of torque
I'm don't want to turn this thread into a debate on how accurate these HP/TQ numbers really are. This is what Nissan USA said they are so that's what I'm writing.
-In 2005 the brakes were upgraded to larger rotors and different pads. Many people had issues with the 03/04's undersized brakes and aggressive pads wearing out very quickly; so quickly that after several lawsuits Infiniti began offering a 3yr/36k mile brake warranty where the dealer took care of all brake maintenance.
-The struts changed in 2005, (I believe the springs stayed the same?)
-Starting in 2004 a VLSD rear differential was provided with the 6MT


Interior
2003- 2004 Has one style, 2005-2006 has another.
Main differences are:
- Gauge style changed and speedo/tach switched places
- Center HVAC display and clock changed
- 03/04 has titanium look center console, 05/06 has aluminum
- 03/04 has a button to change radio volume and temperature, 05/06 has a turn ****
- It has been said that the CD changer in the 05/06 changes faster (not sure, I use an iPod)
- Starting with 05/06 the I-key was offered
- Starting with 05/06 Bluetooth was offered

 

Infiniti dealer just fed you a huge line of crap then.

Every part is different, mainly because the headlights are different and every part on the front matches up to them.
Hood, Fenders, Grill, Bumper, and Headlights are all different.

 

Thanks, I actually remember reading that before I bought my car! Just needed some more clarification. I knew that the dealer was feeding me some bull**** lol.

 

Nope, 03-04 have diff headlights from 05-06. The hood, grill and front bumper are different so the headlights are different as well. Fenders may be different too. Only interchangeable parts are the side skirts, trunk, doors, and rear bumper.

*edit: i'm a lil late lol

 

Marcus is there something you want to share with the rest of us? I mean, I know his name is Ashley but come on.........

 

The wiring harness is a little different on an 05 front door vs an 03 (without heated mirrors at least) body shop found that out on mine.

 

Wait, Ashley is a guy.....oh noes!!

 

Ah. Good to know. I was referring to the doors themselves.

 

Yeah, Ashley is a guy...but he sure is pretty

 

I didn't know Ashely was a dude for months....LOL. I was thinking that this girl has gotta be cool doing all of these mods to her car herself. Then Ashley posted his pic somewhere IIRC and I was shocked.

 

^ I never knew his name was Ashely either lol. I am sure he goes as Ash, Ash Ketchum that is. Got to catch em all!

 

LOL. Yeah, alot of people call me "Ash" probably about a 50-50 split. A very few people know my first name (Ashley is middle) Probably Marcus, Calvin, and Johnathon and anybody else I've paypal'd a shiny nickel or two

Chris is pretty too... it's the hot-pink chaps that do it

 

^LOL ...don't make me bust out the vid!

 

If I ever end up in Cali, I'm buying you a pair of pink chaps

 

just dont come to san francisco with them