Leon PHEV - EV coolant refill

adrianator

Active Member
Sep 13, 2022
108
28
Did anyone get a warning about EV coolant being low? I got it and it is indeed low. I checked it but there are no signs of leaks.

According to the manual, it should be refilled with G12evo which is the same coolant that the IC engine uses. The manual is also mentionenting in bold that i shouldn't top up the coolant and go immediately to a specialised workshop.

But now the question is...why is there a security seal on the EV coolant tank? Whatever safety reasons they think they got can be applied on the coolant used by the IC engine which is missing that seal.

I don't want to put the car on platform and send it to the service for a fluid refill, it's kinda stupid.
 

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Last edited:
Oct 12, 2023
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Also had this warning light on and off recently with my Cupra Formentor PHEV. EV coolant is just below the minimum.

I can't see why there is a security seal and I am reluctant to take it to a dealership for a simple top up. Hoping someone could shed light on why there is a seal?
 

adrianator

Active Member
Sep 13, 2022
108
28
Also had this warning light on and off recently with my Cupra Formentor PHEV. EV coolant is just below the minimum.

I can't see why there is a security seal and I am reluctant to take it to a dealership for a simple top up. Hoping someone could shed light on why there is a seal?
So I searched for an answer. That coolant goes to the batteries and if there is a leak there, the liquid will have a pretty high charge and you can die if you touch it.

But for the moment, I fixed it by removing the hose where the seal is located. After I removed it, a lot of pressured air came out and the coolant was back to normal. That's weird but it worked...for now. I'll keep monitoring it
 

SRGTD

Active Member
May 26, 2014
2,420
1,300
Presumably if the security / tamper proof seal is removed by any one other than the Seat dealership and there’s no record on the car’s digital service record that the EV coolant has been topped up by a dealer, then it would give Seat an excuse to decline any subsequent warranty claims in relation to the EV cooling system.

I'm assuming that if a dealer does top up the EV system, then they would fit a new replacement security / tamper proof seal?
 

C_ED_99

Active Member
Jan 27, 2010
257
19
Presumably if the security / tamper proof seal is removed by any one other than the Seat dealership and there’s no record on the car’s digital service record that the EV coolant has been topped up by a dealer, then it would give Seat an excuse to decline any subsequent warranty claims in relation to the EV cooling system.

I'm assuming that if a dealer does top up the EV system, then they would fit a new replacement security / tamper proof seal?

They'd probably void the warranty on the battery too if the cooling system wasn't maintaining it at the correct temperatures 😞
 
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