Ribbed V-belts — also called poly-V or serpentine belts — wrap around the front of the engine and drive several ancillary components at once: the alternator, power steering pump, air conditioning compressor and, on some layouts, the water pump. Unlike the old multiple-belt arrangement, a single multi-ribbed belt tensions across all these pulleys simultaneously, which makes the condition of that one belt critical to keeping all those systems running. The ribs provide a far greater contact area than a flat belt, enabling the same belt to handle the torque demands of a heavy alternator and a high-pressure steering pump without slipping. Gates and Hutchinson are among the principal manufacturers of original-equipment poly-V belts, supplying pre-routed belt kits to vehicle assembly lines. Failure usually begins with cracking or glazing on the rib faces — often visible as a fine dust of rubber behind the engine bay — and progresses through squealing under load to eventual belt splitting, which cuts power to the alternator and steering system almost instantly. Most manufacturers recommend inspection at 60,000 miles and replacement at 100,000 miles, although oil contamination from a weeping rocker-cover seal can accelerate deterioration significantly. Matching the OE part number ensures the correct belt length and rib count for your specific engine layout.
Each listing on this page maps the OE reference to specific vehicle chassis records in the TecDoc database. Cross-reference the number against your vehicle's make, model, year and engine code using the selector at the top of the page. Ribbed V-belt length and rib count vary between engine variants within the same model range — a 1.6 petrol may use a different belt routing than a 2.0 diesel on the same platform — so the engine code is particularly important to verify.
An OEM belt is manufactured to the vehicle builder's exact specification — the same length, rib profile and rubber compound used on the assembly line, typically by Gates or Hutchinson. Quality aftermarket belts from established brands meet the same dimensional tolerances and carry equivalent OE references, though compound formulations differ slightly between suppliers. Budget alternatives often use harder rubber that is more prone to cracking in cold climates and may glaze prematurely on older tensioner pulleys.
Yes — whenever you replace a ribbed V-belt, it is strongly advisable to replace the tensioner and any idler pulleys at the same time. The pulleys wear at a similar rate to the belt, and a worn pulley bearing can cause a new belt to run off-centre or oscillate, leading to premature ribbing failure. Many manufacturers supply belt kits that include the tensioner assembly, and the combined cost of a kit is almost always less than two separate labour visits.
The first sign is usually a high-pitched squeal from the engine bay at cold start or during sharp steering manoeuvres, caused by the belt slipping on a worn pulley or glazed rib surface. As wear progresses you may notice rubber dust or fine particles around the accessory drive pulleys, or visible cracking across the back of the belt. In late-stage failure the battery warning light can illuminate as the alternator loses drive, and power steering assistance may suddenly feel very heavy. Inspect the belt at every service.
Showing 100 of 18,115 Ribbed V-belt OE numbers. Enter the OE on the main OE search to jump to any reference.
