Doc’s Diesel Cummins Nissan Titan XD 5.0L Parts

Doc’s Diesel has everything you need to keep your Cummins Nissan Titan XD running smoothly on the open road. From fuel-water separators, filter kits, oil filters (even in bulk if you’re feeding a fleet), engine air filters, cabin air filters, transmission filter kits—you name it, we’ve got it. Did we mention our complete maintenance kits? Every part’s designed to click right into place on your 2016–2019 5.0L Cummins, so there’s no guesswork. Replacements like the fuel/water separator (DGF41920), combo kits, and more, fitment guaranteed and ready to roll

Diesel Maintenance Kits That Cover It All

Let’s be real: wrenching on trucks is messy enough. That’s why we’ve made filter kits that bundle everything you need into one easy box: fuel, oil, air, cabin… whatever your rig needs, we’ve got it. Whether it's the full combo kit or just the essentials, Doc’s helps simplify your life so you can get back to driving, not digging through parts bins.

Built to OEM Standards With Doc’s Fitment Guarantee

We only carry parts that meet or beat OEM requirements for a perfect fit, function, and toughness. That’s how you keep your Nissan Titan running like a champ. And with Doc’s Diesel Fitment Guarantee, if something doesn’t fit, we will make it right.

Join Doc’s Diehard Loyalty Program and Get Rewarded With Every Purchase

Here’s the deal: if your cart hits $99 or more, your order ships free within the contiguous U.S., easy as that. More parts, less hassle. Plus, if you sign up for the Doc’s Diesel Diehard Loyalty Program, you’ll start stacking Diesel Dollars (points) toward rewards, kinda like getting a high-five every time you haul filters. More parts, more perks; sweet, right?