Rivian charger emits a loud humming or buzzing noise during charging

Safety first: Some low-level hum is normal, but sudden changes or very loud noise warrant inspection.

• Step 1 – Compare at different currents: Reduce the charging current in the app. If the hum decreases significantly, it may be normal magnetostriction in the contactor.
• Step 2 – Check mounting: With power OFF, verify that the charger is firmly mounted to the wall and that all internal components (contactor, terminal block) are securely fastened.
• Step 3 – Listen for rattling: If you hear rattling in addition to hum, a loose component may be vibrating and should be tightened.

Persistent loud buzzing that is new or worsening can indicate a failing contactor, which should be replaced by a professional.