Im So Pissed Off

[THE JEDI]

I am having serious problems finding coil spring for my 2003 Z4 with M-sport package, I mean this is just freaking stupid, to the point where I'm just done with this crap.....I need some serious help on this one gents...point me in the right direction.

Jedi(lost in Japan)

[chickdr]

Have you tried ECS tuning?

[dc_wright]

Originally Posted by THE JEDI

I am having serious problems finding coil spring for my 2003 Z4 with M-sport package, I mean this is just freaking stupid, to the point where I'm just done with this crap.....I need some serious help on this one gents...point me in the right direction.

Jedi(lost in Japan)

Are you looking to upgrade or to replace one of the OEM springs?

If you're looking to upgrade then springs for the '03 Z4 series will fit. The M Sport springs lower the car 13mm from the standard springs and are just slightly firmer. Any of the upgrade springs will lower the car about 1.5" from where the non M-sport springs sit so they'll lower you about 1" from where you currently sit.

If you're looking for stock replacement springs you have to go to the BMW ETK site and enter your VIN to get the part number for the springs for your car.

[jns_e85]

Originally Posted by chickdr

Have you tried ECS tuning?

^ chickdr is right. Looks like they have them. Note front springs have different part numbers dependent on your transmission

https://www.ecstuning.com/b-genuine-...g/33536761926/

https://www.ecstuning.com/b-genuine-...g/31336760622/

https://www.ecstuning.com/b-genuine-...g/31336760623/

[chickdr]

The only issue may be shipping to Japan.

[Steeler]

There is a set of H&R lowering springs in the classifieds.

[racerbruce]

Go to the Eibach site.

[THE JEDI]

Originally Posted by jns_e85

^ chickdr is right. Looks like they have them. Note front springs have different part numbers dependent on your transmission

https://www.ecstuning.com/b-genuine-...g/33536761926/

https://www.ecstuning.com/b-genuine-...g/31336760622/

https://www.ecstuning.com/b-genuine-...g/31336760623/

I did they sent me the wrong parts, just sen them back friday.

[THE JEDI]

Originally Posted by chickdr

Have you tried ECS tuning?

I did go to ECS got the H&R set wrong won't fit. So sent them back!

[RichZ4]

I've read about 5 hours here and still don't understand which spring works best for Msport.

[pokeybritches]

BavAuto, Turner, etc. are all good too.

I would downplay mentioning the "M-sport" suspension when you're trying to get parts, because it may confuse the company into sending you Z4M parts. If anything, I would call it "sport package". Sport package and non-sport package cars will use the same aftermarket springs/shocks/sways, but the Z4M uses different parts.

[pokeybritches]

Originally Posted by RichZ4

I've read about 5 hours here and still don't understand which spring works best for Msport.

There isn't a best option for everyone, but there is a best option for you. Springs are a compromise among ride quality, ride height, shock life, body roll, compliance, predictability, linear vs progressive, etc. What works best on the race track won't work best on the street, and what gives the most aesthetically pleasing look may not provide good performance.

Coilovers allow some adjustment in ride height and freedom to choose spring rates. Some allow for adjustments for compliance and performance via multiple damping controls, but at extra cost.