I just bought a 2003 g35 coupe a few weeks back from a private owner. The one problem I was told was the leak from the valve gasket but I should have definitely did more research. The vehicle had been sitting in the garage for atleast 6 months. I wasn’t told about the trans having issues and didn’t begin to notice it until about a week or 2 back when the engine light came on and the car would rev when I press the gas without any movement. I went to a mechanic I was referred to that specializes in Gs and 350zs and he let me know there were more problems than I had thought. He fixed the wiring in the fuse box next to the pedals, replaced valve gaskets, and showed some codes for the trans. Unfortunately, the coupe takes a 3 plug transmission and it is extremely difficult to find. I got 2 options from this diagnostic. Pay $1200 for the mech to put in a 3 plug he had lying around in his shop w 79k mileage or find a newish trans and have him install that one? Yet, I can’t seem to find any 3-plugs online only 1plug trans. What should I do?

This is my baby. I do plan on giving her a makeover.

Codes that were brought up. This is the third mech I went to in regards to this and they all had similar codes.

Y exhaust pipe is damaged due to speed bumps most likely. Told me $200 to replace with a used one he had sitting around

This is the replacement. Should I just go to an exhaust guy and have them do it with a newer exhaust

 

@seymore4 you got any ideas ?

 

I would go have a very serious conversation with the person that sold that lemon to you. No way they didn't know the trans was bad...

 

And not to pile on, but this is an abject lesson in why it is really important to get a pre-purchase inspection unless you yourself are qualified to do an inspection (preferably from a dealer in my mind, but certainly from someone really familiar with the platform). It is money well spent. If a seller won't let you take the car for an inspection, that's a red flag waving in your face with vigor to walk away. My current 2006 G was a garage queen with 26.5K mi. in 2017 on a Nissan dealer's lot as a trade-in. Still took it to an Infiniti dealer for inspection. Well worth the $130 then for peace of mind. I'm 68, only one factory new car ('79 VW Rabbit, 4-spd tranny death at 107 miles in 1987...no AC, and having moved from Ohio to NC, it wasn't worth keeping for the brutally humid summers), all others used, never had a lemon. Every used car I've ever bought: dealer, lot, craigslist dude...all with inspections. So far, so good. Including my 2006 Infiniti sedanX (RIP--insurance claim) bought from an Infiniti dealer as a trade-in. I took that car to a local Nissan 350Z specialist for inspection. Trust no one; verify.

 

I appreciate y'all both for the honesty. My lack of patience for my first beater was there and a big reason why. Only because it’s officially mine now, I gotta move forward and see where and when I can turn this lemon into something worthy. I don’t regret it cause I like Gs but if I can turn this around, I’ll gladly do so.

 

So the image with the codes is from the mech who specializes in 350z and Gs. He grilled me a bit worse than you did about buying this without proper preparation but did say that whatever plans I have with this car he would help me get the car to that standard or better. It’ll be a pretty penny but damn I just love Gs (modified or not)

 

Moderator EDIT: Definitely a bot