Quote Originally Posted by schonc View Post
I did 034 mounts not too long ago. Same situation as you; passenger side in two pieces, driver side was warn but still ok.
After finishing the job and looking at the driver side up close in my hands, I thought it may have been better off to just swap the passenger side out with another active mount and retain the active mount function. Driver side is significantly more effort than passenger side. I was however replacing control arms at the same time so it wasn't a huge additional effort to get the other mount out.

How does it compare? I don't know as I bought the car with a busted passenger mount (got a discount for it). But now I'll always wonder lol

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I agree with this, if you're going to do one at a time than stick with the oem to match the one on the drivers side. I also didnt see that you still have 4cyl mode activated. If thats the case I would only stick with OEM as 034 and ECS both require 4cyl mode to be de-activated IIRC. My biggest concern with stock was just that they failed pretty soon, and im not even sure if there is anything that can be done to prevent it. The biggest change with the ECS mounts is you feel the rumble of the engine more at startup and sports mode. After that while cruising its the same. When low in the gears you do get the vibrations as if you were driving a manual which i dont think is bad. I heard the 034 mounts are even more closer to stock in feel because they use rubber instead of the polyurethane in the ECS ones but i never confirmed.