I would like to remain nameless about this as my car is being fixed at the moment. This problem could affect any MKII 172 and could potentially leave you without you car for weeks, I have been without mine for 5 weeks now.
I drove a friend home one night and stopped outside their house, I was stationary in my car for around 5 mins when the engine stalled and would not start again. I called the AA and they came out and were also unable to start my car. My car was towed to the garage the following morning and awaited inspection. Two days later I was told that my car needs a brand-new engine due to they’re being a mechanical fault with mine. The fan belt had apparently snapped and become entangled with the cam belt, therefore causing it to stall (and I would have thought severe damage). According to the Service Manager at the garage its not the first report of this. So if you have a MKII 172 you should enquire with your dealer whether this could happen to your car. I have now been without my car for 5 weeks and my local dealer have had two engines turn up which are no the same as my previous engine. This is more worrying than the fact that my car had a mechanical fault. Doesn’t Renault know what engine is in my car? This whole matter has become very annoying and frustrating.
Hope this may be some help to you.