i have for sale a rear spring from my car i had one broken so replaced the one with a spring that was got from the chassis no i then noticed there was 20mm difference between the 2 sides further investigation revealed that bmw had changed the rear springs in 2009 with non m sport mine was fitted with m sport from the factory,i have also noticed that my m sport ones have blue paint on them and this one has white paint looking for £25 posted payment via paypal as a gift 