BMW X1 Front Suspension Strut: Specs, Fitment & Common Faults
On the X1, a persistent front knock isn't always the strut — a genuinely useful light braking test can help rule out a common, cheaper alternative first.
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OEM Part Number: confirm via VIN — front struts (aftermarket) Bilstein 22-247070 / Sachs 318 292
| Front strut / shock absorber (aftermarket) | Bilstein 22-247070 (LH) and 22-247087 (RH), B4; Bilstein 22-252944 (LH) and 22-252951 (RH), B4; Bilstein 22-247049 (LH) and 22-247056 (RH), B6 Performance; Sachs 318 292 (LH) and 318 293 (RH), ST32/22X179.5; Meyle 326 623 0070 (LH); Maxgear 11-0827 (LH) |
|---|---|
| Front lower arm / wishbone (aftermarket) | LH febi 174729 (with ball joint), Delphi TC3856, Topran 503 303, Swag 33 10 2366; RH Delphi TC3857, Topran 503 304, Swag 33 10 2365, Lemförder 42358 01 (pair 42357 01) |
| Top mount / strut bearing (aftermarket) | Lemförder 39795 01 and Sachs 803 210 (2 per axle); Topran 503 415 (with bearing); Meyle 314 641 0012; Vaico V20-3505; Metzger 6490364 (standard suspension) |
| Genuine (OE) numbers quoted | Lemförder 39795 01 and Sachs 803 210 top mount: 31 30 6 852 433, 31 30 6 872 271, 31 30 6 872 560, 31 30 6 880 367, 31 30 6 884 181, 31 33 6 892 617 (also without the 31 30 prefix); Sasic 7476507 arm LH: 31126879843; Sasic 7476508 arm RH: 31126879844. |
| Fitment notes | Standard twin-tube gas struts plus B6/B8 sport |
M and higher-output variants use genuinely different suspension geometry and stiffer components than standard trims. Both RWD and xDrive versions of the same trim can be specified with M Sport suspension, so drivetrain alone doesn't determine which strut you need — confirm your exact option codes before ordering.
BMW X1 Front Suspension Strut: The System That Quietly Does All the Work
Before you feel a single bump or pothole in the BMW X1's cabin, it's already passed through these parts — which is exactly why wear tends to present as several vague, overlapping symptoms rather than one clear-cut fault. A methodical check outperforms guesswork here.
BMW X1 Front Suspension Strut: What It Does
The BMW X1's front suspension combines the shock absorber and spring mount into a single strut assembly, which is what governs how the car settles after a bump. A worn one lets that bounce continue longer than it should, and it can wear tyres unevenly if ignored.
BMW X1 Front Suspension Strut: Watch: Replacing It
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A Genuinely Important Finding Worth Knowing — BMW X1 Front Suspension
If a persistent knock at the front has proven genuinely difficult to pin down, this is genuinely worth knowing: a confirmed finding from independent specialists shows that a knock specifically when braking lightly from low speeds is one of the most consistent indicators of worn front lower control arm bushes on related BMW models, a common wear pattern as mileage builds. A deliberate light braking test is a standard check used by independent specialists during a pre-purchase inspection, worth trying this specific test yourself.
It's also genuinely worth knowing that on a genuinely brand new car, a removable shipping clip designed to prevent the strut from compressing during transport not being removed has, in documented cases, been the actual cause of a rattling noise.
BMW X1 Front Suspension Strut: Warning Signs, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Front Suspension Strut Guide for symptoms of worn bushings and ball joints, confirming fitment against your VIN, and rubber vs polyurethane guidance.
More BMW Front Suspension Strut
The same part, covered across other BMW models.