Porsche Enthusiasts Club Forum

I know this thread is old but I have found similar mounts from a Jetta which have
a VW Audi mark and part number ZBA 412 353 and the manufacturer Vibrasil (Brazil)

I wonder if these ones you've sourced are the same ?


Either way, as it's been suggested they are different and not an exact fit but I'm not convinced they
will perform the same as their fitment is not ideal.

They are 5mm taller in height and will change the ride height, ok no big deal.
But the Rubber design is tapered and the original 924S / early 944 rubber mount and plate are shaped in a radius
shape. The original rubber donuts not only fit the radius shape of the metal mount but they also fit right up to the top
where there is a flat section. These mounts do not only not fill the metal shape because the angle is different
(Taper v Radius) but also the top of the rubber touches the sides of the radius walls and does not even touch the top.

So these jetta mount also sit 5mm lower than the originals, making a 10mm ride height increase.







The Jetta Mount does not sit Firm inside the metal top plate, and easily moves about. The original has to be pushed
in hard and then does not move at all as it's contour fits the inside of the radius plate perfectly.





R

They are from a USA spec jetta, I think I mentioned it somewhere in the thread. Ive been running them for over 3 years now. I had them out for inspection and they have taken the domed shape. the bearings are still free and smooth. Although they aren't perfect, unless you are building a track car or a street weapon, they are more than adequate for a standard 944.

Thanks for your reply, that's interesting then if they have changed shape? maybe the rubber grade (shore) is softer over time, weight and mileage
they deform and the tapered shape changes to fill the gap?

Yes it's a modified Road car, 300kg+ lighter than a stock 944 so there's much less sprung weight on the mounts.

R

Yes, not completely they have compressed into the cup quite nicely. I still have a pair on myself so I can check the rubber tomorrow. I do seem to remember it being quite soft. You could press your finger into it. Rather than the more plastic feeling rubber of a cheap car tyre. The bottom of my rubber is now flush with the metal mount. I dont know how long it took for it to compress, but id imaging you could set something up with a 5 tonne press and leave it compressed for a day and it would start to form.

Yes I do like the fact the Rubber is softer which should aid more compliance and absorption properties.
I might try them, fill the gap with silicone and then let them take their own shape..

R