Bilstein B3 36-251247 Rear Axle Coil Spring for BMW 1 Series F20/F21 (2011-2019) - OE Spec Rear Suspension/Back Spring, Direct Replacement, Restores Stock Ride Height - Fits 114i 116i 118i 125i 114d 116d 118d 120d

Bilstein B3 36-251247 rear axle spring for BMW 1 Series F20 F21

Restore stock height, crisp road manners and factory feel with this direct-fit rear helical spring for the BMW 1 Series. The Bilstein B3 36-251247 is a genuine-quality, original-spec back axle spring that replaces a broken, tired or sagging unit on the F20 and F21 hatch. Ideal for sorting an MOT failure, fixing rear-end droop and bringing your 1er back to the correct stance with the ride comfort you expect from BMW.

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Why this Bilstein B3 is the smart choice

• Direct-fit, original-spec spring rate tuned to the BMW 1 Series chassis for balanced handling and ride
• Restores correct rear ride height for confident stability, traction and braking
• Excellent control on British roads with the durability daily drivers need
• High strength spring steel with advanced anti corrosion protection for long service life
• The dependable fix for a cracked or sagging rear spring without compromising comfort

Engineering highlights

• Precisely formed ends and compact shapes for quiet operation and correct seating
• Premium chrome vanadium or chrome silicon steel for strength and resilience
• Hot set after forming to minimise height loss over time
• Surface compression and protective coating to resist rust and wear
• Built to original series-production standards for consistent performance

Vehicle applications

Suits BMW 1 Series F20 5 door and F21 3 door hatch models, including popular petrol and diesel variants such as 114i, 116i, 118i, 125i, 114d, 116d, 118d, 120d. If your car sits low at the back, knocks over bumps or failed on a fractured spring, this is the correct rear axle replacement.

Fitting position

Rear axle. We recommend replacing springs in pairs for even ride height and balance.

What our customers say

We have installed these Bilstein B3 springs on many BMW 1 Series cars. Feedback is consistently positive, with owners praising the factory feel, improved stability and the way the car sits correctly again after replacement.

Compatibility check

We verify fitment before dispatch. Provide your UK registration or last 7 of the VIN at checkout and we will confirm against your exact BMW build data.

Professional installation

Need it fitted. Book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Part numbers

• Bilstein reference: 36-251247
• Supplier code: BILSTEIN-36-251247
• EAN: 4025258763411
• UPC: 651860766713