I know the 03s had the dog door trunk. What else is different?

 

I have seen the doggie door from a far, but what exactly is it, what is it for?

 

The 03s had the doggie door. The 03.5s did not. I don't know differences between 03.5 and 04.5.

 

under the the infiniti wording there is a trunk open button that is used by putting ur hand under the wording and pulling up only when all car doors have been unlocked.

 

Yea and it sucks b/c the Infiniti logo is all squished above the handle. Cant rebadge across the trunk b/c of the vertical lines.

 

the interior is different, just go to google type 03 g35 and search (in images) and compare to the search with 04. Easier to see than for us to explain.

 

Where do you guys get the .5 from? Is it by the build date? If so please elaborate. I have a 04 sdn.

 

YoFool. Google it.

 

afaik there are no differences between the 03.5 and 04. )5 is when the major changes came.

 

i think there may have been some interior changes as far as electrical outlets, trim around the radio buttons, etc

 

Also, another significant mechanical difference (upgrade) between the 03.5 sedan with 6MT and '04 and beyond 6MT is the addition of a VLSD differential (limited slip "posi" rear end).

On the interior, the '03 6MT sedan had no cupholders in front, while the 04 6MT's and beyond got a redesigned console with two cupholders (awkwardly positioned, but they are there).

FYI

 

the 03 didnt have a 6mt option

 

As I recall, the 6 speed manual transmission became available late in the 2003 model year. Infiniti never called it a "2003.5", either.

 

Anyone buy the VLSD rear end and fit it on their 03 and 03.5's. Wow, I would like to have one in mine

 

Manually shifting the auto transmission actually works as advertised in the '04. It will automatically downshift as you slow down, and when you stop you'll actually be back in 1st gear, as displayed on the dash. Starting out again you can shift manually from 1 - 2 - 3 - etc.

On my '03.5, if I was in 5th "5" is still displayed when I stop. When I start out again it is essentially back in auto mode up to the gear that's displayed. So basically I need to tap it down 4 times whenever I stop, if I want to manually shift when I start out again. Kind of sucks.