Citroën C1 II, B4

Additional Notes

• The Citroën C1 II (B4) coolant capacity is listed as a range of 3.6 to 4.3 liters across all four engine configurations covered in the specifications. A range rather than a fixed value typically reflects variation between a partial drain-and-refill service fill and a full system overhaul capacity.
• The 1.0 VTi 68 with engine code CFB carries the same 3.6–4.3 liter capacity range across both the 2014-2017 and 2017-2019 production periods, indicating no change in cooling system volume between those two spans despite the model year distinction.
• The 1.0 VTi 72, also carrying the CFB engine code and covering 2018-2021, shares the identical 3.6–4.3 liter capacity range as the 1.0 VTi 68 variants. The shared engine code between the 68 and 72 power outputs suggests a common engine block with differing calibration, which aligns with the matching coolant figures.
• The 1.2 PureTech 82 with engine code HMZ, spanning 2014-2019, also falls within the 3.6–4.3 liter range. Despite being a three-cylinder engine of larger displacement than the 1.0 VTi units, the cooling system capacity does not differ from the smaller engine variants according to the specifications.
• All four rows are designated under normal use conditions. In cooling system service contexts, a normal use interval typically applies to standard driving cycles without sustained high-load or extreme temperature operation, as opposed to severe duty classifications.
• The note field for every row reads "cooling system," which identifies the capacity figures as applying to the entire cooling circuit rather than a sub-component such as the expansion tank alone.