this week traded in my 1991 Miata which I have been driving about two years for a brand new 2013 Silver Club Miata with six speed manual and Power hard top. I just have to say I love this car. Glad it isn't my only car but I just love driving this car. Nothing else I can say.

 

Hello folks, that car is a beautiful piece of work, I don't want to hijack your thread but obviously I am new here and new to the Mazda MX 5, I have a few issues that I would like to discuss with someone in the know. My car is a 2007 MX 5 Miata hardtop convertible in hunter green with a really nice metal flake. Auto tranny with M mode, Touring trim. I liked the car but it had some issues with the front end when I first drove it at Flood Mazda in Wakefield RI.
They promised to fix that issue and a few more that I have had.
At 75 MPH, it starts to vibrate, at 80 it's almost unbearable. The wheels in front were dented and new ones fitted, they were all high speed balanced, and checked for load. The tires are Cooper 205/45/17. I have never used this brand so I am not familiar with the tire. So far, I am not fond of them.
I would say that this is the only major issue. They have tried to fix this several times but it still persists.
Let me qualify myself as to my knowledge of sports cars. My last car was a MINI Cooper that was all done up with 17" wheels and Toyo proxy T1R rubber. These were great tires that worked well. No prob. w/ wheel wobble at all. Of course different car. 2005, Crossfire roadster that I wish I still had. This was a sports car. All Mercedes SLK components with T1R's as well 18" F 19" rear.
That's really only two but you get the picture. There are many more.
Only reason I have listed these two is to illustrate that I am well aware of cars and their idiosyncrasies.
Any Ideas? Please feel free to let me know. Rick

 

At 75 MPH, it starts to vibrate, at 80 it's almost unbearable. The wheels in front were dented and new ones fitted, they were all high speed balanced, and checked for load. The tires are Cooper 205/45/17. I have never used this brand so I am not familiar with the tire. So far, I am not fond of them.
I would say that this is the only major issue. They have tried to fix this several times but it still persists.

Essentially you have done would I would have. I wonder how the wheels got bent. maybe they dropped it too hard from the transporter. If so they could have done even more damage. Imagine how that knocked the struts!
The new tires could be bad. has it gotten worse over the miles you drove? Rotating the wheels could be giving you a hint: if the trouble moves it's still the wheel/tire combo.
If it doesn't make a change I would consider a new wheel alignment. I would insist them measuring every angle before and after and give you a full report.
Finally a laser diagnosis of the unibody could reveal a problem.

I got to go in the basement. Tornado sirens are sounding.

I once had trouble with the rear wheel on the minivan shaking at high speeds. It turned out that the drum was badly machined and out of balance. Have your rotors been affected in any way?

 

Just bought the same car last month for my wife. Silver w/black power top.
We love it also