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Guide to Replacing the Cabin Heater Radiator on the Seat Leon

Model: Seat Leon MK 3, 5F - Years 2012-2019
Part: Heater core

The instructions in this guide will allow you to remove and replace the cabin heater radiator on the Seat Leon. First, get inside the vehicle and start by removing the plastic panel found at the bottom, next to the pedals; inside, you will find the cabin heater radiator, disconnecting the pipes and undoing the screws of the radiator brackets. At this point, disconnect the radiator from the engine bay by removing the pipes located behind the engine block; remove and replace the radiator with the new original one, topping up with coolant.

Posted on 19 February 2026 by ScegliAuto

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