A quick update, we have our FR back now, the dealer managed to experience the fault, and we believe they have pinpointed it. We now have the car back and are reasonably confident (or at least as much as you can be with intermittent faults) this has been resolved. Now i am by no means tecnical, but the over all jist is a wiring loom had become displaced/ moved more than it should too closely to the alternator, generating a charge and causing a surge or something along those lines causing the car to cut out. Hope this helps with others having similar concerns, our dealer have been top draw in persisting on this for us, and hope this is the end of this one.
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New Leon (2025) - engine cuts out randomly!
- Thread starter d_drive1
- Start date
Hi, please could you message me and tell me the outcome to this problem.. as we have the same issue. Thank you
Please can you help.. we have the same problem with our Seat Leon 25 plate. The dealer is saying they can’t find anything on the diagnostics. We have told them others have had this problem, however they have said could you get the chassis number off someone like yourself so they can check it out. Sorry to bother you but so frustrated with this car. Thank you
PC1860* is asking for the VIN from elrolzio's vehicle.
With the VIN of the rectified vehicle, the other dealer can check what repair was carried out on the now fixed vehicle and try it for themselves on the faulty vehicle.
Without the basic vehicle details (reg/vin) the dealer can't look into it further.
Hi there,
I’ve just bought a brand new 75 plate Cupra Formentor 1.5tsi petrol/manual and am having the exact same issue.
In the few weeks I’ve had it, it must have cut out at least 10 times at roundabouts/Junctions.
I’ve owned Seats for 15 years so have tried all the different variations of drive assists etc, and it’s still doing it.
Just randomly cuts out and says ‘engine needs to be started manually’.
Obviously this is ridiculous dangerous as fear I’ll end up getting rear ended.
I am going to contact Cupra this week but thought I’d ask on here first so I had at least some information to give them if someone has managed to get it solved.
TIA.
I’ve just bought a brand new 75 plate Cupra Formentor 1.5tsi petrol/manual and am having the exact same issue.
In the few weeks I’ve had it, it must have cut out at least 10 times at roundabouts/Junctions.
I’ve owned Seats for 15 years so have tried all the different variations of drive assists etc, and it’s still doing it.
Just randomly cuts out and says ‘engine needs to be started manually’.
Obviously this is ridiculous dangerous as fear I’ll end up getting rear ended.
I am going to contact Cupra this week but thought I’d ask on here first so I had at least some information to give them if someone has managed to get it solved.
TIA.
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Has been a while buts since this post our car was rejected, the problem occurred again, with the system saying to take to dealer immediately. We agreed to have a replacement car, and then only a few weeks in and have started to have the same issue with the replacment car, cannot really believe this!! Hope others are having more luck but the more i read, the more i fear this is an inherent issue. Will try and update in hope that others can benefit from it.
Hi,
My new Cupra Leon 1.5tsi has been cutting out randomly when pulling away which is really annoying as it seems like a well known problem that has been fixed by vw group.
My new Cupra Leon 1.5tsi has been cutting out randomly when pulling away which is really annoying as it seems like a well known problem that has been fixed by vw group.
Hi Paul, you've joined someone else's introduction thread. No worries. Welcome to the site. If you head on over to the CUPRA Leon section, I'm sure someone will be able to help you out / you'll find someone with similar issues.
Cheers
Scott
So glad I found this thread - I thought it was just me. I bought a new 25 plate Seat Leon 1.5 petrol manual (now done 9000 miles) and experiencing exactly the same problem, an intermittent engine cut out (about a dozen times in total) often when rolling along in 2nd gear (engine idling) when approaching a roundabout/junction. Very unsettling to find the engine has died just as you pull out in to traffic. Although it can be restarted with a push of the start button the experience is unnerving to say the least.
I've just booked it in to our Seat dealership for its first oil change and asked them to investigate this problem. However they want £170 for an hour's investigation and if they don't find a problem (or do find one that's not covered by the warranty) I will have to pay the £170. From what I've read above the chances of them diagnosing the problem seem very remote.
Has anyone else made any progress with this issue recently ?
I've just booked it in to our Seat dealership for its first oil change and asked them to investigate this problem. However they want £170 for an hour's investigation and if they don't find a problem (or do find one that's not covered by the warranty) I will have to pay the £170. From what I've read above the chances of them diagnosing the problem seem very remote.
Has anyone else made any progress with this issue recently ?
I posted the above a few months ago. I don't wish to seem like I'm teaching people how to change gear, but I thought there was a technical issue and there wasn't.
Just thought I'd re-post this in case it's of any use, or food for thought. It does seem to be a 1.5 TSI manual box issue.
I don't think this issue is a "normal" stall due to overloading the engine. In my experience a stalled engine (just poor driving) can be restarted by depressing the clutch (if auto stop/start is on). Whereas in this case that will not work - the engine start/stop button has to be pressed to get it running again.
We had a mk3 Leon (1.2 petrol manual) for eight years previously - fantastic car, not a glitch in 120,000 miles. Was hoping the later model maybe even better...
Hi James,
There is another thread concerning the same issue;
Engine cuts out/stalls
Hi, First ever Seat and love it but it I’ve got a problem already. I purchased a Seat Leon FR Sport back in May. This is a 74 plate reg. Since having the car, I’ve noticed, now 6 or 7 times, that the engine cuts out while driving at low speeds when approaching, or pulling away from roundabouts...
www.seatcupra.net
Not sure how these things work but is it possible to "merge" them or link them in some way ?
Should anyone find a successful cure for this issue then please update this thread with the solution so it helps others in the same situation.
I'm having very similar problems. I purchased my first (and I promise my last) SEAT care on PCP. It is SEAT Lean FR, 25 plate, got it in May 2025. Since then I have have innumerable, intermittent faults where my engine will cut out. This can happen any time of day or night, irrespective of weather, incline or other road conditions. I cannot replicate the fault.
These happen when driving, typically at lower speeds, but with the car under power, where the engine cuts out, demanding a manual restart. This has resulted in me being rear ended once.
I refuse to put my children in the car, but my wife has driven the vehicle and similar episodes have occurred with her, with the engine cutting out.
I have take the car to the dealership three times, the first two times they haven't found a fault and, now. the third time I've left it with the dealership and refuse to take it back, as they cannot locate the fault.
We have not experienced any similar episodes in any previously owned cars - two Hyundai Tucson's, Hyundai i20 and i30, Dachia Duster, SEAT Ibiza or KIA courtesy vehicle.
I also had a separate issue (which prompted taking it in) where the front sensor detected a collision alert and initiated an emergency break. The road ahead was empty. Thankfully no accident caused, and other than some mild whiplash no injuries sustained.
The dealership, Listers Worcester, now wish for me to undertake a drive with one of their mechanics as they cannot replicate the fault. I have told them repeatedly the issue is intermittent and I cannot replicate it, but I feel they are trying to pin the issue on "how I drive". They have said they can buy the vehicle back, which would leave me massively out of pocket, and I feel that they would then sell this car to some other unsuspecting person, putting them and other road users at risk.
If anyone can help, if anyone has found out what is causing their issue, or any advice and guidance on the next step to resolve this dispute with the dealer taking their defective car back would be greatly appreciated. I don't want to go through legal hassle or Ombudsman but I feel this may be my only option.
These happen when driving, typically at lower speeds, but with the car under power, where the engine cuts out, demanding a manual restart. This has resulted in me being rear ended once.
I refuse to put my children in the car, but my wife has driven the vehicle and similar episodes have occurred with her, with the engine cutting out.
I have take the car to the dealership three times, the first two times they haven't found a fault and, now. the third time I've left it with the dealership and refuse to take it back, as they cannot locate the fault.
We have not experienced any similar episodes in any previously owned cars - two Hyundai Tucson's, Hyundai i20 and i30, Dachia Duster, SEAT Ibiza or KIA courtesy vehicle.
I also had a separate issue (which prompted taking it in) where the front sensor detected a collision alert and initiated an emergency break. The road ahead was empty. Thankfully no accident caused, and other than some mild whiplash no injuries sustained.
The dealership, Listers Worcester, now wish for me to undertake a drive with one of their mechanics as they cannot replicate the fault. I have told them repeatedly the issue is intermittent and I cannot replicate it, but I feel they are trying to pin the issue on "how I drive". They have said they can buy the vehicle back, which would leave me massively out of pocket, and I feel that they would then sell this car to some other unsuspecting person, putting them and other road users at risk.
If anyone can help, if anyone has found out what is causing their issue, or any advice and guidance on the next step to resolve this dispute with the dealer taking their defective car back would be greatly appreciated. I don't want to go through legal hassle or Ombudsman but I feel this may be my only option.
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