BimmerFest BMW Forum banner

1 - 12 of 12 Posts

·
Registered
Joined
·
25 Posts
Discussion Starter #1
Just bought a 97 1.9 roadster. The ride is not as smooth as I remember my old 97 I sold a few years ago. How do you know you need new shocks. If I am going 60 miles an hour on the highway in a curve and I hit a bump the car hops a few inches left or right, if that makes sense. Should I just take it to a shop to have them check the suspension.
 

·
BMW CCA 1405
1997 BMW Z3 1.9
Joined
·
5,172 Posts
You don't give the miles, but it appears from the poor ride and the side-hopping that you need new struts and shocks.

The smoothest and also the least expensive items are Monroe SensaTrac.
Sensen are inexpensive but hard, and may have quality problems -- I had to get rid of mine.
Sachs are original equipment, but expensive, and mine rode poorly at 32,000 miles.
KYB are a good balance of ride, handling and cost -- what I finally got.
Koni and Bilstein are expensive. Their street models ride alright and handle well.

If your tires are old, they can also be contributing to a poor ride. The tires on the car I bought were originals with 32,000 miles and plenty of tread. But the car had a wiggle at low speed and a vibration at road speeds. New tires got rid of that. With new tires, struts and shocks, the car became smooth and pleasant to drive.
 

·
Registered
Joined
·
25 Posts
Discussion Starter #3
Thanks, vintage42. The miles are 135,000. I suspected shocks and struts but I am not a mechanic. I will check into getting them changed as soon as possible. I believe the tires are pretty new.
 

·
BMW CCA 1405
1997 BMW Z3 1.9
Joined
·
5,172 Posts
The KYBs are called Excel-G.

STRUTS
Front R:
KYB 334604
Front L:
KYB 334605
SHOCKS
KYB 343330

eBay is probably the least expensive source.
Also see:
http://www.autoaccessoriesgarage.com/Suspension/KYB-GR-2-Shocks
http://www.tirerack.com/suspension/...+Roadster+1.9&autoYear=1997&autoModClar=&cat=
https://www.amazon.com/s/ref=nb_sb_...ement+strut&sprefix=KYB+334604,automotive,387
https://www.amazon.com/Shock-Absorb...id=1382998874&ref_=sr_1_2&s=automotive&sr=1-2
I bought from a local import auto parts store, struts for $165 and shocks for $55, because the car was on stands, with the defective Sensens returned, and I didn't want to wait on mail ordering new parts.

At 135,000 miles you will need new foam rubber strut bumpers, and probably new strut mounts. Also get a couple of plastic cable holders for the left strut, as these get broken in removal. Do you know how to find your part numbers or need them provided? The plastic strut dirt covers should be OK, unless they are missing. The rubber spring pads should also be OK.
http://s49.photobucket.com/user/vin... Related/Z3OEbumpercover.jpg.html?sort=4&o=14
 

·
Registered
Joined
·
25 Posts
Discussion Starter #6
I did find everything I need on line including all of the mounting accessories. I priced everything I need at two places for $ 495. Thanks for the info.
 

·
BMW CCA 1405
1997 BMW Z3 1.9
Joined
·
5,172 Posts
... KYB appears to be a good choice. Will this work on a 2000 M roadster?
The parts in #5 fit a standard suspension, not the sport suspension. An M likely has sport suspension.
Go to the vendor sites in #5 and put in your year and model Z3, and the site will say whether the parts fit.
Or put the last 7 of your VIN into the decoder at
http://bimmer.work
and the data sheet will show your suspension.
 

·
Registered
Joined
·
37 Posts
Koni Strut cartridges and shocks

For those who have installed koni strut cartridges and shocks on their M Roadsters. Has there been a need to modify the strut housing or was it just all pulg and play?

Thanks!
 

·
Registered
Joined
·
37 Posts
I checked the VIN but did not see a mention sport suspension on my 2000 M roadster. Does that mean it has standard suspension? It also says it is a BASE.

Thanks!
 

·
BMW CCA 1405
1997 BMW Z3 1.9
Joined
·
5,172 Posts
If you had a M, the data sheet would call it an M.
M Z3s are most recognizable by dual exhausts with four tips. If you don't have that, you could have a base Z3 with M embellishments on the door sill, steering wheel and shifter knob.

M Z3s have a different suspension with lower springs and different struts, probably not even called Sport.
Base Z3s can have an optional Sport suspension, which would show on the build data sheet.
I think the M suspension, Sport suspension and Standard suspension are all different.
 
1 - 12 of 12 Posts
Top