Hyundai Bayon, BC3 (EU)

Additional Notes

• The Hyundai Bayon BC3 (EU) 1.0 T-GDI carries the largest cooling system capacity in the lineup at 6.37 liters, which is notably higher than the 4.5-liter figure recorded for both 48V-Hybrid variants of the same engine displacement.
• The difference in coolant capacity between the standard 1.0 T-GDI and the 48V-Hybrid versions of the same engine reflects the additional thermal management demands introduced by the hybrid system's battery and power electronics, which require a separate or expanded cooling circuit.
• Both 48V-Hybrid configurations, the 74 kW and the 88 kW variants, share an identical cooling system capacity of 4.5 liters, with no difference in fill volume between the two power outputs.
• The 1.2 MPi engine, covering model years 2020-2023, holds 4.8 liters of coolant, placing its capacity between the two T-GDI engine families in the specifications.
• Across all engine variants, the normal-use service interval for coolant is set at 30,000 km or 24 months, whichever comes first, applying uniformly regardless of engine type or output level.
• A first-change-only interval of 210,000 km or 120 months is specified for every engine variant in the lineup. At 120 months, the time-based figure represents a 10-year service life for the initial factory coolant fill before the standard recurring interval takes over.
• The 210,000 km distance threshold tied to the first-change-only interval is seven times the 30,000 km recurring interval, indicating the initial factory fill is formulated to last significantly longer than subsequent service fills.
• The 88 kW 48V-Hybrid variant covers model years 2020-2024, while the 74 kW 48V-Hybrid carries a starting year of 2020 with no closing year in the specifications, and both share the same 4.5-liter capacity and identical service intervals.