BMW X3 Rear Springs: Specs, Fitment & Common Faults
Confirmed by suspension specialists: the rear springs come off without a spring compressor, but matching the right spring to your suspension type matters more than it might seem.
Illustration for editorial purposes
Opens live listings in a new tab.
Genuinely Separate From the Shock Absorber — And Genuinely Easy to Get Wrong
Unlike the front strut, the rear spring on this platform is a separate component from the shock absorber and doesn't need a spring compressor to remove or install — a genuinely more DIY-friendly job than the front. That said, spring rates and lengths vary significantly based on suspension type (Standard, M Sport, Adaptive M) and drivetrain (RWD vs xDrive), so it's worth matching the part number from your original spring or verifying against your VIN rather than assuming from trim badge alone.
BMW X3 Rear Springs: A Part That Fails Quietly, Then Suddenly
The most common sign of a failing rear spring is uneven ride height or gradual sagging — one corner of the car sitting visibly lower than the other, or the entire rear end looking lower than normal, well before any dramatic failure.
BMW X3 Rear Springs: Watch: Replacing It
This video is of an earlier generation of the same model; the job is similar but the spring seats and fixings can differ slightly.
OEM Part Number: confirm via VIN — rear coil springs (aftermarket) Kilen 51139 / Monroe SP5391
| Rear coil springs (aftermarket) | Kilen 51139; Monroe SP5391 (electronic damping, 341 mm); Sachs 992502 (M technology); Lesjöfors 4208546 |
|---|---|
| Genuine (OE) numbers quoted | None quoted in the catalogue listings — the genuine spring varies by engine, suspension type and body style, so order it against your VIN |
| Standard suspension, RWD | Genuinely a different spring from the xDrive version below, and from the M Sport spring further down — confirm drivetrain and suspension type before ordering |
| Standard suspension, xDrive | A genuinely different spring from the RWD version above, reflecting the different rear axle layout needed for the AWD driveline |
| M Sport spring (passive or Adaptive M) | A genuinely different, stiffer spring from Standard — shared between passive M Sport and Adaptive M suspension, since the electronic system adjusts damping rather than spring rate |
| Self-levelling (pneumatic/air spring), where fitted | A genuinely different type of spring entirely from a conventional coil — confirmed by BMW's own parts terminology as a distinct "pneumatic spring" rather than a steel coil |
Always replace BMW X3 rear springs in pairs — a single new spring paired with an old, sagged one on the other side creates an uneven ride height and handling bias.
BMW X3 Rear Springs: What It Does
The BMW X3's rear coil spring supports the weight of the car's rear end and absorbs the initial impact of a bump, working alongside the shock absorber (which controls the spring's rate of compression and rebound) rather than replacing its function. A sagged or broken spring lowers ride height, can affect headlight aim, and in severe cases is an MOT failure item.
Opens live listings in a new tab.
BMW X3 Rear Springs: Warning Signs, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Rear Springs Guide for symptoms of a failing spring, confirming fitment against your VIN, and OEM vs aftermarket guidance.
More BMW Rear Springs
The same part, covered across other BMW models.