The John Deere AL230929 is a genuine OEM Diesel Exhaust Fluid (DEF) Tank designed for various John Deere agricultural machines. This critical component stores the DEF solution, which is injected into the exhaust system to reduce harmful nitrogen oxide (NOx) emissions, meeting modern environmental standards. Constructed for durability and precise fit, the AL230929 ensures reliable operation and proper integration with the machine's emissions control system. It is an essential replacement part for maintaining the performance and compliance of your John Deere equipment.