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June 10, 2026 Service bulletin

Reduced heater performance due to engine coolant deposits clogging the heater core

Genesis technical service bulletin 26-HA-002G TSB for 2022-2026 Genesis GV70, 2021-2025 Genesis G80 and 2021-2025 Genesis GV80 and others.

Bulletin number
26-HA-002G TSB
Component
Engine
Summary
Some Genesis vehicles (listed below) equipped with Lambda-III 3.5T-GDI engines may exhibit reduced heater performance due to engine coolant deposits clogging the heater core. This bulletin provides instructions to verify the concern and to replace the front and rear heater core (if applicable).

Owners of these vehicles have filed 89 complaints in the engine category.

Vehicles covered

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