John Deere DEF Tank Header Assembly Part No: AT491599

The John Deere DEF Tank Header Assembly AT491599 helps your DEF system do its job right—keeping emissions low and engine performance high. This tank header gives you steady Diesel Exhaust Fluid flow so your equipment meets regulations and avoids costly downtime. It’s built tough to handle rough worksites and weather changes, which means fewer breakdowns and less hassle for you. If you’ve noticed DEF system alerts or sluggish power, this tank header assembly might be the fix you need. Designed to fit perfectly and install quickly, it’s a smart replacement whether you’re doing maintenance or repairs. Get yours now from Doggett John Deere—before it’s out of stock and your machine is stuck in the shop.