Two problems related to carrier/rack have been reported for the 2004 Infiniti G35. The most recently reported issues are listed below.
Recently I was traveling on the freeway, not under an overpass and there was no one in front of me. I rolled my window up and shortly after that there was a loud crashing sound of shattering glass, I look in my rearview mirror to see that there were a ton of black specks coming from my car. I cracked the sunroof cover slightly only to find a shower of glass and a hole in my roof where the sunroof used to be. I closed the cover back up so I wouldn't get anymore glass in my cabin or on me, found somewhere to park and inspect my vehicle. I found that the glass had shattered upwards (air pressure maybe???) either way, this should never have happened, I am now terrified of having a sunroof because why wouldn't it shatter again like that? it was one of the single most traumatizing events that have ever happened, I couldn't even imagine what it would have been like if the cover was open! I could have got little glass shards in my eyes and the outcome could have been extremely worse.
2004 Infiniti G35 with only 47000 requires 1 1/2 quarts of oil between 3000 mile oil changes and Infiniti states that this is normal. Also rack and pinion steering had to be replaced. Car still under warranty, but Infiniti refuses to check oil usage.