New Coil Springs on E46 M3

[RHY 11S]

Hi All, just a quick query. The garage has just dagnosed one broken coil spring on the front and one on the back. I have two questions:

1. Is it OK to replace with non-BMW springs on a car like this?
2. Should I replace both sides at the same time? ie: all 4?

Many thanks!

Rhys

[dan101smith]

1. Yes, as long as you get something decent
2. Yes

[mmm-five]

But remember that if you go aftermarket (i.e. lowered, rather than pattern part) then you'll have to notify your insurance of a modification and possibly pay an increased premium.

See if you can find a cheaper source of OEM parts and you'll be fine, or do as the Z4M guys do and fit Eibach springs.

[roofer]

Personally if its a road use car, i'd stick 4 OEM springs back on.

[tjw110]

I've just had to replace both rear springs on my 2005 E46 M3 cab with 40k on the clock, it's such a comon fault on E36 and E46, the chances of it happening again a high, just stick on some Eibach Pro's and in place of the poor quality OEM

[mat205125]

tjw110 said:

I've just had to replace both rear springs on my 2005 E46 M3 cab with 40k on the clock, it's such a comon fault on E36 and E46, the chances of it happening again a high, just stick on some Eibach Pro's and in place of the poor quality OEM

How much do they lower the car?

Is there a noticable reduction in ride quality, or a tangible increase in handling performance?

Did you have your geometry reset after the swap?

Pics?