I've had my Titan XD for nearly a year now. On a number of other forums (boating, shooting, etc) I keep reading how we'll never get 300k miles out of these trucks due to DPF, etc. "Just a bad decision to buy this truck".
I went and did as much reading as I could to educate myself as to WHY it is that people say this, and I'm not coming up with an answer. I certainly don't consider myself a gearhead, but I am an engineer by trade, so I can logically assess a situation and come up with an answer if I do my research.
So let's begin.
My history with Nissan goes back five vehicles: two Altima, an Armada, a Maxima, and now my Titan. In none of these vehicles did I experience any major problems that weren't self-inflicted (wife drove over a curb in her '98 Maxima in 2010 and did some underside damage. We just traded it in on a 2016 Jeep Cherokee Overland). The Armada performed magnificently everywhere except at the pump. The Altimas were flawless. So Nissan - the platform - was without problems.
Cummins is considered by many to be the Gold Standard of diesel engines. They've been around for nearly one hundred years. With the exception of two 5.9L engines (the "53 Block" and the "Killer Dowel Pin" that occurred between 1988-2002) their engines have been bulletproof (or so I've read). So I believe it's fair to say that they have a history of making reliable Diesel engines. The 5.0L engine was supposedly nine years in the making, and is a completely revolutionary design, making more use of a CGI block, newly designed turbocharger that is more fuel efficient, and better emissions control - which I understand is a bone of contention with many - but the government mandated it so we're stuck.
The last major component is the transmission. For that they used the Aisen A466ND - which is basically the same transmission that the Ram 3500 uses. Supposedly it's overspec'ed for the Titan/Cummins pairing.
So now, with all of that, where are the potential flaws in the design of this truck that would prevent it from reaching 20 years or 300,000 miles?
I'm not interested in comparisons of this to other brand trucks; I bought this truck and it's the only one I want to discuss. Please make compelling cases as the design flaws that will prevent me from getting 20 years/300,000 miles out of this. I should add that I have a lifetime warranty on the powertrain, and the vehicle will follow factory maintenance schedule completely.
Please help me understand why this won't make it. Thanks.
With proper maintenance any vehicle will last 300K+ miles. There is no way these trucks will run 300k miles without some problems though. IIRC, the DPF system is designed for 100k miles. So, somewhere around that time, you should have expectations of having to remove/replace these components. Water pumps, fuel pumps, oil pumps, etc... certainly are not rated for 300k miles and will have replacement intervals well short of the 300k mark. Other fuel system components like glow plugs, injectors, etc all have a time line. Bearings, hubs, ball joints too (not to mention alternators, starters, sensors, other electrical components, etc..). Basically, as a whole, the truck will last as long as you want to spend money to fix it.
So, i guess my question to you is : What exactly are you asking? Are you asking if we think the engine specifically (block, pistons, heads, etc..) will last 300k miles? Are you asking if we think the truck will run 300k miles without any major replacement items?