Product Details

• Article Number: 181808 — Febi Bilstein complete rear axle dust cover and bump stop kit. The German premium aftermarket equivalent of the Ridex 3365P0047 — same part function, premium OE-supplier brand.
• Kit Contents: 2 × concertina-style rubber dust covers + 2 × polyurethane bump stops (one set per side). Visible in the product image — the kit covers BOTH rear shock absorbers in a single purchase, unlike sourcing dust covers and bump stops separately.
• Fitting Position: Rear Axle — installs on both rear shock absorbers. One complete kit services the entire rear axle.
• Suspension: For vehicles WITH sports suspension AND WITHOUT electronic suspension control.
• Dust Cover Function: The dust cover is a flexible accordion-fold rubber boot fitted over the exposed shock absorber piston rod. As the shock compresses and extends, the boot accordions to keep dirt, grit, sand, water, and salt away from the polished piston rod surface. Without it, airborne particles score the piston rod, destroying the shock's internal oil seal — causing oil leakage, damping loss, and complete shock failure within months.
• Bump Stop Function: The bump stop is a dense polyurethane cushion (visible white/cream component in the image) that sits inside the upper shock mount. It compresses on heavy suspension impacts (potholes, speed bumps at speed, off-road work) to protect the shock absorber from damaging metal-to-metal contact at maximum compression. The polyurethane material absorbs and dissipates impact energy, then returns to shape — far more durable than older foam-rubber bump stops.
• Weight: 0.26 kg total kit weight — both dust covers and both bump stops combined.
• Condition: New — factory-sealed in Febi Bilstein OE packaging.
• Manufacturer: FEBI BILSTEIN — German automotive parts manufacturer founded in 1844, headquartered in Ennepetal. Febi is a true OE-supplier (Original Equipment) — many of their parts are functionally identical to "genuine BMW" parts, simply rebadged. Trusted across European dealer networks for OE-quality replacement parts at significant savings over genuine-branded items. A premium-tier brand suitable for customers prioritising longevity and quality over price.
• OEM Cross-References: BMW 33 53 6 787 175, BMW 33 53 6 787 175 S1 — direct equivalents to these original BMW part numbers.
• Vehicle Compatibility: Designed for BMW X3 (F25, 2010 onwards) and BMW X4 (F26, 2014 onwards) M Sport variants without electronic suspension control. Always verify against your vehicle's VIN, suspension package (M Sport vs. standard), and adaptive damper status before purchasing.
• Replacement Recommendation: MUST be replaced alongside rear shock absorbers. Installing expensive new shocks without new dust covers and bump stops is a false economy — torn dust covers allow contaminants to destroy the new shock's piston rod seal, while compressed/cracked bump stops fail to protect the new shock from impact damage.
• Service Reality Check: This kit is one of the smartest "while you're in there" purchases on a BMW. The labour to access the rear shocks involves disassembling the rear suspension — adding dust covers and bump stops adds maybe 5 minutes per side. Skipping this kit forces a complete redo of the labour 6–18 months later when the unprotected new shocks fail prematurely.
• EAN: 405422481808

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