Nissan X-Trail e-POWER 2023 Owners Manual
11.5.1. Checking inverter coolant level
Check the coolant level in the reservoir when the engine is cold. If the coolant level is below the MIN level (2), add coolant to the MAX level (1).
Tighten the cap securely after adding inverter coolant.
If the inverter cooling system frequently requires coolant, have it checked. It is recommended you visit a NISSAN dealer or qualified workshop for this service.
Owners Manual