hey guys, i was hopin someone could tell me which production years are the 2004.5 350z, i have done the search and found the post about the 2004 or 2004.5, buh either im slow or something and cant figure out which years are the right ones. im interesting buying one, also is the knee pads on the center console make it a 2004.5...

 

wut

 

Are you serious?

 

You got that right.

 

2004.5 were made late 2003 through summer 2004.

The VIN number is what determines whether it's a 2004.5 or not - assuming you saw the other posts on how to identify one. If not, here for the millionth time...

2004 Nissan 350Z Coupe/Roadster (Coupe VINs up to D*4T160000,E*4T060000) (Roadster VINs from D*4T102001 to D*4T110000 & from A*4T002001 to A*4T010000)

2004.5 Nissan 350Z Coupe/Roadster (Coupe VINs from D*4T160001, E*4T060001) ( Roadster VINs from D*4T110001, A*4T010001)

If the letter before the 6 digit serial number is "M" instead of "T", it's a 2004.5 because it was produced at the Oppama plant.

 

Whats so special about a 2004.5?

 

Nissan moved to the 2004.5 production right around 10/03. The biggest technical difference was the inclusion of wideband upstream 02 sensors. Damn, I sound like a grandfather.

 

Done forget revised suspension as well as a few cosmetic changes (knee pads, shoulder belt retainer, etc.)

 

icic, you guys are like 350z guru's, thanks!!

 

its not like you're on a supra forum asking about a Z, you're on a Z site asking about a Z so we should know.

 

6/03 and after is considered a 2004......2004.5 in reality terms does not really exist. Like when i order parts for cars i dont say let me get a thermostat for a 2004.5 350 z. Usually what Shariff is saying may be true, but the Up Widebands are usually found on the California Emissions Z's in the beginning but they went all around in the newer year makes.

 

If it is a production date specific part then they will ask you for the corresponding production date and the dealer will know whether it is for a 2004, 2004.5, 2005, etc model year car.

 

dealer always wants the VIN #.

 

Exactly, hence why you never have to specify model year.

 

Indeed. But then again i only use the dealer for specific items like CATS and or Manifolds just for examples. On the norm i use World Pac.

 

Ah, but it does really exist, just like the 2006.5 is also an official half-year model. I can tell you from personal experience, there is a separate factory service manual for the 2004.5 and that the wiring for the BCM (among other things) is different than the 2004 model. The VIN number I posted about in post #5 came from the Nissan website as well as the FSM.

 

personally i never really look into the differences only due to the fact that if there is some kind of problem i go through the schematics that are already done up for me so i never really notice differences unless i work on the same type of car/problem daily or repeatedly you know. Might happen once every few months to never at all. Unless it is a common issue on occasions. But next time i get a Z in i'll check the differences and compare it to mine as well.

 

This is not an indicating factor of an 04.5!

The simplest way i have found is to locate the O2 sensor connection in the engine bay, passenger side is easiest to get to if the plug is rounded at corners and has 4 prongs its an 04. If it has 6 prongs and plug has squared corners its a wideband O2 sensor and must be a 04.5 or later! (also useful to know if you ever want to replace your O2)

 

WTF are you talking about????? In January of 2004, production moved from Togichi to Oppama. No 2004 models were ever produced at Oppama. There's nothing more definitive in determining a 2004.5 than the "M".

BTW - if you don't have physical access to the car, what use is the O2 sensor connector? With the VIN, you can always tell.

 

My vin checkes out using those guidelines to be on 04.5 but my vin # has a T. Recently i had to replace my O2 sensor, since they changed to wideband this year i had to take my vehicle to the nissan dealership they ran the vin and came back with corresponding replacment part numbers i then contacted Bosch and they ran the numbers to match with there OEM replacement it matches to the 05 wide band O2 sensor to confirm that i then sent a photo to Z1 Performance the plug in the 04 and 05 are different they confirmed i have a 05 wideband sensor concluding it must be a 04.5 so i would say that "M" or "T" are not defining factors of the year!