the convertibles use the stronger rear shock mount like the M3.

so yes, it's different from the coupe/sedan (excluding the M3)

but if in a jam it will fit, just not as strong

 

The strongest OEM rear shock mounts known to date are the ones out of an E30 convertible. RSM fit any 3 series from 1984 to date.

Get either those or these http://store.bimmerworld.com/lifetime-e30e36e46-3-series-rear-shock-mount-set-p397.aspx

 

The strongest OEM rear shock mounts known to date are the ones out of an E30 convertible. RSM fit any 3 series from 1984 to date.

that's not true, the E46 (M3) convertibles got a newer stronger bushing. used on other later convertibles. even stronger than the E30ic. Even the E30 M3ic had it's own stronger rear bushing.
http://www.realoem.com/bmw/partxref.do?part=33526779670


i've owned an ACS E30 convertible back in the day, i know. and busted them out before upgrading.

 

Well many companies like TMS have tried every single OEM bushing that theres is and they swear that E30c is the strongest

 

as much as i respect TMS they seem to be the only one on that page then. Companies like Bavarian Autosport, UUC, Bimmerworld and Rogue Engineering, off the top of my head had all gone the way of E46 M3 convertible stronger mount. several pulled their ads and are hard to find (unless like me you saved it) as they came up with and are selling their own aftermarket mount now. i've never heard of anyone in any M3 circles going back to the E30 mount.

http://www.uucmotorwerks.com/html_techtip/techtips/rear_shock_mounts.htm

 

Wow! How did you find that old page? It's not linked from anywhere on our current website.

Things have changed over the years. This is now the strongest, most reliable RSM you can get that won't squeak or fracture like poly:

http://www.nexternal.com/uuc/Product550

 

I've also heard the E46 M3 convertible to be the strongest RSM. I haven't tested it out. I currently have the Meyle HD RSMs--I wonder how they compare to the E46 M3 convertible RSMs?

With whatever mount you choose, make sure you get the Z3 reinforcement plates

 

Here I go again pleading guilty

I get seduced by the carriage trade machined and polished parts that will outlast my car by at least a factor of two. And no one seeing my car will ever see these parts!
Yes, I bought the Turner Motorsport Al upper rear shock mounts: http://www.turnermotorsport.com/p-3666-e30-e36-e46-aluminum-rear-shock-tower-mounts-pair.aspx
In the advertising they state that if they wear out you can replace just the rubber pieces, but I'll confess I could not tell you where to buy these replacement parts either.
And I enjoyed installing them!

 

I get seduced by the carriage trade machined and polished parts that will outlast my car by at least a factor of two. And no one seeing my car will ever see these parts!
Yes, I bought the Turner Motorsport Al upper rear shock mounts: http://www.turnermotorsport.com/p-3666-e30-e36-e46-aluminum-rear-shock-tower-mounts-pair.aspx
In the advertising they state that if they wear out you can replace just the rubber pieces, but I'll confess I could not tell you where to buy these replacement parts either.
And I enjoyed installing them!

I had those once. they were called the shuttle mounts. advertised that you could change the bushing out on the car. they sell the replacement bushings and sold the replacement "track' bushing if you wanted them firmer. they were a good design.

 

I have M3 RSM's in my sedan right now. I thought I'd get those instead of non-M for extra longevity.