well all ive just snapped a rear spring and wondered if there were any other model springs i can fit ie e36 or e46 springs or is it just z4 springs to fit
thanks
andy
your best bet is to buy the spring that matches the one that broke. Go to RealOEM.com and find the specific part number for that spring. Best not to run a different model's spring unless it has the identical part number, spring tension, length, etc.
Or you can upgrade and go aftermarket, springs/shocks or coilovers.