Approved used Cupra Formentor issue with no fix

[Browter]

I bought a 2021 Cupra Formentor VZ2 as an approved used car from a SEAT garage in January 2025. Almost immediately it developed an issue where 2 errors were displayed - 'Emergency Assist Unavailable' and 'Travel Assist Unavailable'. Travel Assist is the combined adaptive cruise and automatic steering to keep the car in lane. This would happen at least once on 80% of journeys and often multiple times per journey.

The garage I bought the car from is around 70 miles away so I took it to my local SEAT garage who replaced a control module. The errors are now reoccurring so the car went back to the garage I bought it from for diagnostics. They have advised this is a known technical issue with the car but there is no fix available. The car came with a 2 year warranty.

What options should I be looking to go through on this? They have offered to buy back the car for around 85% of what I bought it for but I don't think I should lose any money on what is essentially a faulty product. Exchanging it for another car of the same brand/model would likely only give me the same problems. I like the car but it has so many electrical issues I think it is probably better to get rid of it.

[samoht]

AFAIK you are entitled to reject it for a refund, however the garage may deduct from the refund an allowance for the use you have had of the car.

How many miles have you put on the car since Jan?

The key thing is the rate per mile of the deduction, some garages may try and use 45p / mile based on HMRC rate, however that includes fuel, insurance etc which you have paid yourself anyway so is way over.

Another approach is to value the car today with it's original mileage and again with its current mileage (WBAC etc), and take the difference as a fair deduction.

[Browter]

I've done 2,500 miles in the car since I bought it

[Trevor555]

Browter said:

I've done 2,500 miles in the car since I bought it

Formally reject the car.

Then if they offer you 85% of it's value, get that in writing.

They can make a deduction for usage, but it shouldn't be £3,000 ish.

Is the dealer FCA regulated?

Do you have finance on the car?