Hyundai i20, BC3 (EU)

Additional Notes

• Cooling system capacities across the Hyundai i20 BC3 range vary notably by engine. The 1.0 T-GDI (non-hybrid) holds 6.37 litres, the 48V-Hybrid variants of the same engine hold 4.5 litres, the 1.2 MPi holds 4.8 litres, and the i20 N 1.6 T-GDI holds the largest volume at 6.9 litres. A larger cooling system capacity generally reflects a greater total volume of coolant circulating through the engine block, cylinder head, and associated components.
• The 1.0 T-GDI non-hybrid capacity of 6.37 litres is notably higher than the 48V-Hybrid version of the same engine, which holds only 4.5 litres. The mild-hybrid system integrates additional electrical components that alter the thermal management architecture, which accounts for the difference in total cooling circuit volume.
• Under normal use conditions, all engine variants in the i20 BC3 range share a coolant change interval of 30,000 km or 24 months, whichever comes first. Normal use in this context refers to standard operating conditions as opposed to extended or first-fill intervals.
• A "first change only" interval is specified separately for each engine variant. For the 1.0 T-GDI, both hybrid and non-hybrid, and for both 1.2 MPi variants, the first change interval is 210,000 km or 120 months (10 years). This extended interval reflects the use of a long-life coolant formulation at the factory fill, which degrades more slowly than standard coolant.
• The i20 N 1.6 T-GDI carries a different first-change-only interval compared to all other variants. Where most engines specify 210,000 km or 120 months for the first change, the N variant specifies 90,000 km or 60 months. This shorter first-change interval on the performance-oriented 1.6 T-GDI suggests a more demanding thermal environment that accelerates coolant degradation relative to the lower-output engines.
• Both output variants of the 1.0 T-GDI 48V-Hybrid, rated at 74 kW and 88 kW respectively, share identical cooling system capacities of 4.5 litres and identical service intervals across both normal and first-change-only conditions. The power difference between the two does not translate into any variation in cooling system specification.
• The two 1.2 MPi variants, rated at 58 kW (from 2024) and 62 kW (2020-2024), share the same 4.8-litre capacity and identical service intervals. The capacity and interval specifications are consistent across the power output change introduced with the later variant.
• The i20 N 1.6 T-GDI, introduced from 2022, holds 6.9 litres of coolant, the largest capacity in the BC3 range. A higher-displacement turbocharged performance engine generates more heat under load, and a larger coolant volume supports greater thermal buffering capacity within the system.