I found that problem with toyota, bulletproof little cars like the hyundai, but when they do go wrong, they cost. No copy parts available. We have a Honda jazz now, since April 2019, hasn't missed a beat, touch woodWell let’s hope so! there has not been a copy of the part made yet so had to have the real Hyundai part fitted
well about £400 later! 
Does it have an OBD2 port in the glove compartment/near the steering wheel /under the dashboard area?
I had an old skoda fabia2 & it had warning lights appear on it, I bought on of these OBD 2 readers, plugged it in & downloaded the app on my phone, bingo! I got the code number of the fault & googled it, fitted a new part I bought off of eBay & it cost me about £60 instead of £300'ish never had trouble with it afterwards for that part.
Had another issue with something else afterwards and discovered the fault code was out of my capability to sort, so got the garage to do the work for me, but I could have a guess'timate of the price of parts, etc. before I took it in.
This diagnostic reader only cost about £10 but it was good for basic code finding faults, it could fix & clear some fault codes by itself, although mine came back the second time, so I knew it was a garage mechanic type job.
Torque Pro ELM 327 Android OBD Bluetooth Fault Scanner / Diagnostic Code Reader Robot Check
Just read the post, that said about the gearbox, when my clutch was on its way out & I felt like I was revving the engine, the acceleration was awful it kept slipping the clutch.
No lights came on, but the clutch was replaced & it was back to normal afterwards
£7k! Eek!
Sounds like if your mechanic has already put the car through a diagnostic check then this little gadget wouldn't be much use to you, a garage usually uses more expensive & sophisticated equipment so they should have found something if its electronically recorded.
I don't suppose the car had a warranty with it? If you purchased with a credit card, could you get some support with claiming back the cost? If you've only had the car a year then I would class it as not fit for purpose - opposed to general wear & tear?
Especially with a low mileage. Can you check on Nissan's database to see if there's any product recalls outstanding that could affect the gearbox or clutch?
They might have to replace it for free if there are any recall notices out on it?
Contact Nissan &/or the original seller tomorrow as its still January to log a complaint, hopefully if its January to the next January, you'll have more luck than January to February of the following year, it sounds less, but I've no idea if it will work, but always worth a try to save some money!
Good luck xx
xx
@Lady Kelly
Have a look at this which magazine link...
Are any of these options available for you?
My new or used car has a problem, what can I do?
It mentions credit & finance purchases, timescales, consumers acts to help you find anything relevant to your situation
Good luck
we know all about Nissan dealers. They’re stupidly expensive. And make mistakes! They once did a service and mot and REMOVED A FUSE! Shortly after My husband was driving and an airbag error came up. Trying to get an appointment was ridiculous!
This sounds stupid, but is it parked on a sloped drive? My work vans always come sup with an oil warning light when it's parked on a slopeWe have a Nissan Qashqai thru Motability that hubby got via MOD (he was former RAF).. anyway, for a few weeks now, there is a notification in the dashboard about oil level warning or something. Hubby thinks it is not a major issue coz it only appears when he starts the car and no warning flashing. Anyway, last week, he called Nissan and told them about it. They said that since it's due for service on March anyway to take it to them. But then hubby was told that there is a recall for the cars coz of ABS failure or something so they need to have the car the whole day. Hubby told them we have to travel from Denbigh to Birkenhead (the nearest Nissan from us) and we would need a courtesy car coz we can't stay there the whole day waiting. The earliest they can book us is on mid March. When hubby ask about the oil level warning, he was told to just look at it from time to time.
The only good thing about all this is that hubby don't have to pay anything.
No it's not parked in a slope. The warning first appeared while hubby was driving. Now it's just a message in the dashboard everytime the car is started, not a constant warning light.
Weird, I would just check the oil dipsrick regularly, our van warning light is way innacurate, but it is a fiat and fiat are rubbish cars to be fair
Yeah that's what they told hubby instead of us taking the car right away and them checking it for faulty.
Do you have full movement?
Weird. Maybe you just banged it without knowing. Is it painful to the touch?
I bet they know they aren't accurate, but won't admit it, not if it's Nissan, they won't sayYeah that's what they told hubby instead of us taking the car right away and them checking it for faulty.
.......... and those nails 
That’s dreadful, silly parent!
And people leaving their rubbish in the trolley when the bin is just a few feet away.People who don’t put their shopping trolley back!
Just leaving it anywhere in the carpark for someone else to do it.
