Product Details

• Article Number: 305P0081 — Ridex serpentine (poly-V) belt, a single continuous belt that drives multiple engine accessories in one loop. Reference code for the 6PK1700 specification (6 ribs, 1700 mm length).
• Length: 1700 mm — the effective belt circumference. Must match exactly — a belt even 10 mm off-spec cannot be installed correctly and will slip or fail prematurely.
• Number of Ribs: 6 — matches the 6-groove accessory pulleys on the BMW F25 engine. Using fewer or more ribs than specified will cause slippage, squealing, and rapid belt destruction.
• Width: 21.36 mm — precise width measurement across all 6 ribs. Designed to sit flush inside the pulley grooves without overhang.
• Parameter: 6PK1700 — the standard belt industry designation: 6 ribs (PK profile) × 1700 mm length. This is the universal cross-reference code used across all belt manufacturers.
• Thickness: 4.45 mm — overall belt thickness from the top flat surface to the tip of the ribs. Affects belt flexibility around idler and tensioner pulleys.
• Material: Rubber — base construction material providing flexibility and grip.
• Belt Material: EPDM (Ethylene Propylene Diene Monomer, M-class rubber) — modern high-performance belt compound with superior heat resistance (up to 130°C), ozone resistance, and longer service life compared to older neoprene or polychloroprene belts. Industry-standard for vehicles produced after ~2010.
• Tensile Cord Material: Polyester — internal cord reinforcement that prevents stretching and maintains consistent belt length under load. Ensures the automatic belt tensioner operates within its design range throughout the belt's life.
• One-sided / Double-sided: One-sided — ribbed on one face only (the drive face). The smooth back of the belt rides against idler pulleys.
• Colour: Black — standard automotive belt colour.
• Condition: New — factory-sealed in Ridex packaging.
• Manufacturer: RIDEX — AUTODOC's in-house OEM-equivalent aftermarket brand, manufactured in IATF 16949 certified factories.
• OEM Cross-References: Audi / SEAT / Skoda / VW 030 145 933 AC, Audi / SEAT / Skoda / VW 030 145 933 AQ, plus BMW part numbers (additional cross-references for other VAG and BMW platforms).
• Vehicle Compatibility: Designed for BMW X3 F25 sDrive 18d. Also cross-compatible with multiple VAG (Audi, SEAT, Skoda, VW) platforms using the same belt specification. Always verify against your vehicle's VIN or existing belt part number before purchasing.
• Service Interval: Recommended inspection every 30,000 km; typical replacement interval is 90,000–120,000 km, or when cracks, glazing, or fraying is visible. Always replace along with the belt tensioner for best results.

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