Bilstein B3 Rear Coil Spring for BMW 1 Series F20/F21 2011-2019 – OE Spec Back Axle Suspension Coil, Direct Fit Replacement | Fits 116i 118i 120i 125i 114d 116d 118d 120d 120d xDrive 125d | Part 36-251223 (BILSTEIN-36-251223) | Stock Height OE Quality

BILSTEIN B3 Back Axle Suspension Spring for BMW 1 Series F20 F21 2011 to 2019 - Part 36-251223

Bring your BMW 1 Series ride height, comfort and stability back to how it should be with the BILSTEIN B3 rear suspension coil. This high quality, factory-spec replacement is the smart fix for a snapped spring, noisy rear end, uneven stance or MOT advisories on the back springs. Precision wound, preset and protected, it delivers original-level feel without lowering and without compromise.

Part number 36-251223, also referenced as BILSTEIN-36-251223, is a direct-fit rear spring for the F20 five-door and F21 three-door 1 Series platform across popular petrol and diesel variants including 116i, 118i, 120i, 125i, 114d, 116d, 118d, 120d, 120d xDrive and 125d.

Why this BILSTEIN spring is a top choice

• Original equipment grade performance on the back axle for a factory-fresh driving feel
• Accurate spring rate and consistent ride height for confident handling and braking
• High strength chromium silicon or chromium vanadium wire for outstanding durability
• Hot set after forming to minimise height loss over time
• Pigtail ends and compact minibloc design for quiet operation and precise seating
• Shot peened and coated to help resist corrosion and extend service life
• Direct-fit solution that works with the stock dampers and geometry on standard chassis cars

We fit these springs in our workshop and customers love the result. Expect a smooth ride, tight body control and the correct stance. Ideal as a quality replacement for a broken rear spring or to refresh tired suspension on daily driven cars and motorway commuters.

Vehicle coverage

Fitting position: rear, back axle. Suitable for BMW 1 Series on the F20 and F21 platforms, model years 2011 to 2019, including:

• Petrol: 116i, 118i, 120i, 125i
• Diesel: 114d, 116d, 118d, 120d, 120d xDrive, 125d

Perfect for three-door F21 and five-door F20 hatchbacks across the range, including xDrive all wheel drive variants where listed.

Part identifiers

• Manufacturer: BILSTEIN
• Part number: 36-251223
• Alt code: BILSTEIN-36-251223
• EAN: 4025258763398
• UPC: 651860766690

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

We can check compatibility before dispatch. Add your UK registration or the last 7 of your VIN at checkout so we can confirm the correct rear spring for your BMW 1 Series.

Good to know

• Replace rear springs in pairs for balanced ride height and consistent handling left to right.
• Designed for standard suspension specification. Not intended to lower the vehicle.

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