I love my I35. It has great power for a V6, comfortable and reliable. I tend to drive this car pretty rough and it has held up to everything I put it through. I purchased mine used with 96k miles, I've owned it for 8 years now, going past 235k miles and have only made minimal repairs (power steering hose, oil cooler gasket, alternator(due to not being careful when putting oil in the car and it dripping down onto the windings), and the radiator(due to a minor accident)). To say this car is reliable is an understatement. I try to work on my own cars whenever possible and this car is very easy to make repairs on, when needed. When and if this car ever kicks the bucket, I will definitely be looking for another one as a replacement.
Granted, I have religiously maintained this car since bought-new in Southern California in April, 2004 (Nov., 2003 "build date" on original window sticker), but I must say this is, apart from the peppy performance, BY FAR the most reliable vehicle amongst the ten I have owned since purchasing my first car back in the late 1970's - still my "daily driver" now 12 years later. Concierge-style Infiniti dealer service experience, separate from, and a definite cut above, the norm. Benefits from the well-known Nissan reliability, but with the sturdiest parts in the bin, being basically a more upscale Maxima. Soft, supple leather interior. Tremendous navigation system for the time period (bird's-eye view a big plus), though Nation-wide coverage depends on purchase of separate (expensive) discs for differing multi-State "zones" if you're looking to travel cross-country. Other than routine maintenance and normal-wear items such as tires, windshield wipers, battery, etc., the ownership experience has been FLAWLESS. Stability Control keeps the car rock-stable in wet or icy conditions. Body integrity remains perfect: zero rust after 12-plus years. Athletic body stance, though not as "sexy" as (say) a BMW -FAR offset by the EXTREMELY minimal cost of upkeep. Tip: Buy the best all-season tires you can afford (ie. Bridgestone Turanza's worked well for me), as I noticed a definite difference in handling when "good rubber" was in evidence (never unpleasant, but downright smile-inducing when better).
Rock solid car, strong, reliable engine, roomy passenger compartment, power and heated everything, and has a rear window shade. Replaced the radiator recently due to cracks. Replaced the struts assemblies. New BF Goodrich Tires only have a few thousand miles wear. Have recently replaced the factory stereo with a new Kenwood (Excelsior model) CD, stereo with all inputs, jacks. All major maintenance performed at Infiniti dealership. Oil always changed every 3,500 miles. Paint is still terrific. A few dings. Interior leather has a few small tears. This is a really good value. Sold the vehicle through CarLotz Auto Consignment in Richmond, VA (West Broad St location) in early September 2016.
I just recently purchased my 2004 Infinit I35 from an elderly woman who was the only owner of the car before I got it, Amazingly it only has 17k miles on it and it apart from a few small scratches on the outside the interior looks brand new! Great to drive, very quiet, and comfortable I am just completely in love with this car and think I definately got it for a steal at 9,000!
Car has been fantastic. Over the past few thousand miles, I average 27.1 mpg. I live in CO and love the heated steering wheel and seats. Can't complain about anything. Actually trying to find a car to replace both my F150 and I35 but cannot find one that matches the combination of these two vehicles. The car just has too many features. I bought it for 10k with 49k mikes last year. There is no way you can find this reliability, these options and this mpg for under 10k...I wish they still made the I series...I hate the squished feeling of the new models.