common problem with the factory design is the shock does not take
only a vertical load - the trailing arm has an arced range of
motion. This forces the shock to pivot around the upper shock
mount, which eventually causes the adhesive bond in the stock
rubber mount to fail - a process expedited when combined with
new design allows this pivoting motion and dramatically extends the
life of the mount. We are so confident in these mounts that if they
ever fail, you can trade them in for a new set at no charge! Made
with high quality Buna rubber to eliminate squeaks and a high
production stamped steel plate, costs for this extraordinary mount
are close to the BMW factory price. Fits all 1984-present 3 Series
cars (including convertible).
in pairs - Includes washers
Note: Gaskets are not included.
Time Will Tell
From John Bennetch of Grottoes, Virginia on 12/8/2014.
E 46 Cars are notoriously hard on rear shock mounts when stock shocks are replaced with stiffer units. My 330i driven fairly conservatively absolutely trashed some new "HD" mounts in 10K miles when I installed Bilstein HD shocks. These look much stronger. Time will tell. Bimmerworld stands behind their products so at least if they don't I'll get a free replacement!
From alex@abrhouston of Spring, Texas on 7/7/2014.
nice heavy duty stuff.
From taylor192 of Vancouver, British Columbia on 3/17/2014.
Do yourself a favour and use some anti-seize on the shaft of the shock before slipping it into the metal sleeve of these RSMs. I went to remove these RSMs and found the metal sleeve seized to my shock. Unfortunately I'm going to have to cut the metal sleeve off if penetrating oil doesn't help. If this was mentioned in the installation instructions it is my bad.
Nice but not "factory"
From John Goddard of Lafayette, California on 8/6/2013.
Originally, I was drawn to the 'better than stock' description, for a part that still utilizes rubber rather than a race-part with a bearing - ideal for a sporty street-driven car. One key issue not mentioned elsewhere: these mounts are not identical to the OE mounts, and so don't have the 'shoulder' to accept the stock rubber boots that cover the shock towers (they can just sit on there, but not secure). Ok, this is a small point, and they're hidden under the carpets. But if you are doing a very high-quality restoration, you won't want this - just does not look good. It's pretty obvious now from the photos, but I did not think about this when I ordered. - FYI.
Good replacement for stock
From Matt of Altoona, Pennsylvania on 6/6/2012.
These things squeaked like crazy when I first installed them even though they say they aren't supposed to. The first 5 mile trip I had to take in my car the day I swapped these in was horrible. The first thing I did when I got home was tear the shocks off and use poly bushing grease on all surfaces of the rubber including where the inner sleeve goes. No more squeaks! These look like they will hold up much better than the blown stocks ones I replaced.
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