Hi,
Now that I have been driving the car more I note on start-up there is a squealing like noise from the exahust or/diff. For sure from the rear. When car is warmed up noises are gone.
I also note why is the car whining so much when revved out? It sounds good but there is a manic whine that goes with it.
Thanks.
Hi, just bumping this. Hopefully someone can reply.
Thanks.
Squealing noise from back when warming up! Can’t possibly be from the diff if it has just started and the car is static. That is weird. The engine does sound awful when first started from cold as it sounds like it has a blown exhaust. This is the EGR system which goes off after about 15 to 20 seconds.
My ND makes a turbo like whine when accelerating but I think that is something to do with the “Sound Tube” that transmits induction noise into the cabin. I quite like the whining sound that it makes.
I had a loud whine coming from the passenger side then I realised I had the wife with me 
Thanks!
It sounds like a supercharger noise to me. I mean I love that sound but it is a bit excessive don’t you think? As long as it does not indicate a problem with the engine or other parts it will be fine.
Yeah the squealing noise happens when you set off. Sounds like the exhaust is the source. Like a metallic metal tube squealing noise. Strange. It is not overly loud and goes away when the car has been driven for 5-10 minutes.
A drone noise happens when you start the car. It is related to the fuel emissions according to the user manual. Again it is excessive the noise and again it goes away after 5-10 minutes. I did not mention this in the original post but surely you get this too.
The “Supercharger” noise that I describe is not that loud or worrying. It’s just a faint whistle/whine.
The squealing noise from the back end for the first five to ten minutes could be rusty rear brake discs.
Yes all NDs have the drone/blowing exhaust noise caused by the EGR. It’s just a character of the car and is easy to live with.
However this is all speculation. You have to remember that the MX-5 ND is a typical lightweight sports car (with minimal sound proofing) and as such noises generated by the car/engine will be a lot more noticeable than what you would get in a normal saloon. Many people like the various mechanical noises they can hear because they feel it gives them a better feel for what the car is doing unlike being completely isolated in a tin top saloon.
If you are really worried that these noises represent problems with your car I would ask for ride in another example of an ND or get another ND owner to have a ride in your car with you pointing out the noises that are of concern. That way you will be able to judge if the noises are part of the “character” of the ND or not.
Hi,
Yes that is what I intend to do. Someone with experience in MX5’s will be inspecting and test driving it soon-ish.
It is good though to get other people’s views who have the MX5 ND themselves.