BMW F20 F21 F31 xDrive rear coil spring Bilstein B3 36-251261

Direct-fit Bilstein B3 rear coil spring for BMW F20, F21 and F31 xDrive models. Not a generic 'BMW spring' - this one’s verified for the rear axle of those specific chassis with xDrive.

Hot-set from high-strength chrome vanadium steel, surface-compressed and corrosion-coated for UK conditions. Holds ride height longer than worn OE units - ideal for fast-road use or as a sensible track-day refresh.

• Fits 120d xDrive, M135i xDrive, M140i xDrive, 320i xDrive, 328i xDrive, 330i xDrive, 335i xDrive
• Replace in axle pairs to maintain even stance and handling balance
• No modifications, no specialist tools - bolt-on fitment