Bilstein 36-313280 B3 OE Replacement Rear Coil Spring for BMW 1 Series E81 E87 E88 & 3 Series E90 E92 - Rear Axle - Fits 120d 320si 325i

Bilstein B3 OE-Spec Rear Spring for BMW E8x and E9x Platforms - Part No. 36-313280

Bring your BMW back to its proper stance and composure with this Bilstein B3 rear helical spring. Engineered to original specification for the E81, E87, E88, E90 and E92 chassis, part number 36-313280 is a direct-fit back axle spring that restores factory ride height, comfort and confident handling without altering the character of your car. Ideal when your existing spring is tired, cracked or sagging, this is the quality replacement trusted by enthusiasts and workshops alike.

Why this spring is the right choice

• Direct-fit solution that matches original BMW spring rates and geometry for a seamless swap
• Brings the car back to correct height and balance for predictable road manners and a composed ride
• Manufactured from premium chrome vanadium or chrome silicon spring steel for high strength and durability
• Hot set after forming to minimise height loss over time
• Shot peened, surface-compressed and coated for excellent corrosion resistance on UK roads
• Precisely engineered ends and shapes including pigtail or minibloc where required for OE-level fitment

What our customers say

We have installed these springs at MJ Modifications on multiple customer cars and our own builds. Feedback is consistently positive. Owners love the factory-fresh stance, the quiet and compliant ride, and the way the car feels tight and stable again. This is our go-to standard replacement for BMW E8x and E9x rear suspension.

Fitment and position

Position: Rear axle

BMW 1 Series

• E81 3-door hatch 09.2006 to 12.2011: 120d, 123d
• E87 5-door hatch 02.2003 to 01.2013: 118d, 120d, 123d, 130i
• E88 Convertible 12.2007 to 12.2013: 118i, 120i

BMW 3 Series

• E90 Saloon 02.2004 to 02.2012: 316i, 320si, 325i
• E92 Coupe 01.2005 to 12.2013: 316i, 318i, 320i, 325i, 330i, 335i, 320d, 325d, 330d, 335d

Part identifiers

• Part number: 36-313280 | BILSTEIN-36-313280
• Range: Bilstein B3 OE Replacement
• Manufacturer: Bilstein
• EAN: 4025258864699
• UPC: 651860871882

Compatibility check before dispatch

For total peace of mind, we verify fitment using your UK registration or the last 7 of your VIN prior to shipping. Add your vehicle details at checkout and we will confirm this spring is correct for your car.

Professional fitting available

Want it fitted by BMW suspension specialists? MJ Modifications is based in Warwickshire and offers expert installation. Request a quote at info@mjmodifications.co.uk.

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