Fendt 900 Vario COM3b

AdBlue (DEF) capacity & service interval

The Fendt 900 Vario COM3b uses AdBlue (DEF) fluid with a capacity of 36 liters. The data covers 5 configurations of this model.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

The Fendt 900 Vario COM3b AdBlue system is associated with a selective catalytic reduction (SCR) setup, which is an emissions control technology that injects diesel exhaust fluid into the exhaust stream to reduce nitrogen oxide output.
All five variants covered — the 927, 930, 933, 936, and 939 Vario Tier 4 — share an identical AdBlue tank capacity of 36 liters, indicating a uniform reservoir design across the model range for the 2014-2018 period.
A 36-liter AdBlue capacity is a substantial tank volume for agricultural machinery, reflecting the extended field operation cycles typical of high-horsepower tractors where frequent refilling would be impractical.
Each variant carries a Tier 4 designation, which is the emissions standard that mandates SCR technology use, directly explaining why an AdBlue system is present across all listed configurations.
The capacity figure of 36 liters applies under normal use conditions for all five variants, meaning the specification is not adjusted for severe-duty or other alternative operating scenarios within the listed data.
The serial number structures — 950, 951, 952, 953, and 954 — correspond respectively to the 927, 930, 933, 936, and 939 model designations, each sharing the same AdBlue tank volume despite representing different power output levels within the lineup.