Product Details

• Article Number: 424I0388 — Ridex particulate cabin air filter, an economy-tier OEM-equivalent replacement engineered to BMW factory specifications. The economy alternative to the Mann-Filter CU 1721-2 — same vehicle fitment, lower price point.
• Filter Type: Particulate Filter — pleated paper media construction that captures pollen, dust, mould spores, brake dust, and PM2.5 particulates. Single-layer particulate-only construction without activated carbon impregnation.
• Length: 164 mm — outer dimension of the filter frame. Identical to the Mann-Filter CU 1721-2 — confirming direct fitment compatibility.
• Width: 90 mm — outer dimension.
• Height: 30 mm — depth profile of the filter media pack.
• Function: Removes airborne particulates (pollen, dust, mould, brake dust, PM2.5) from cabin air before it enters the passenger compartment via the HVAC system. Improves cabin air quality, protects passengers from respiratory irritants, and prevents debris buildup in the HVAC blower motor.
• Service Recommendation: Replace at every major service interval — typically every 15,000–20,000 km or every 12 months. For Tanzanian driving conditions (dusty roads, seasonal Harmattan dust, frequent city traffic), consider shortening to every 10,000–12,000 km.
• Condition: New — factory-sealed in Ridex packaging.
• Manufacturer: RIDEX — AUTODOC's in-house OEM-equivalent aftermarket brand, produced in IATF 16949, ISO 26262, and VDA 6.3 certified factories. Ridex cabin filters use multi-layer pleated media engineered to match OEM filtration efficiency at a significantly lower price point.
• OEM Cross-References: BMW 64119237159, BMW 6411925118 — direct equivalents to these original BMW part numbers.
• Vehicle Compatibility: Designed for the BMW X3 F25 with the behind-the-glove-compartment cabin filter housing variant. Always verify against your vehicle's VIN or existing filter part number before purchasing.
• Quality Tier: Economy / budget-friendly — Ridex offers OEM-equivalent fitment and certified filtration performance at a fraction of premium-brand pricing. Excellent option for price-sensitive customers, fleet vehicles, or workshops servicing high volumes of routine maintenance.

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