Drive belt part number — OEM vs. Mazda

Tags: #part-number · #mazda-6-compat

The correct original drive belt for the X80 is FAW part number 5DA015909¹. Some suppliers erroneously ship a Mazda part (6PK2260) when the order is placed against the FAW OEM number — verify the exact part number printed on the belt packaging before installing²³. Similar-looking belts from different manufacturers (Dayco cross-references were mentioned as available) may have different sizing, so cross-checking is important even for "equivalent" listings⁴⁵.

Length specification and break-in stretch. The factory belt length is exactly 2263 mm. A newly installed belt often feels very tight and won't fully seat at first — this is normal; the belt stretches with use, and after roughly 30,000 km it settles to proper tension. Owners are advised not to force or over-tighten the belt on initial installation⁶⁷⁸. A separate report gives the same 2263 mm figure and adds that a 2260 mm belt is sometimes reported to fit, but fitment with the shorter size should be verified rather than assumed^9101112.

Wear indicator — thin fibers in the oil. A sign of belt wear/degradation: the appearance of thin fibers or strands (волосики) visible in the engine oil during a routine oil change. This indicates the belt is deteriorating and may fail soon; when fibers are observed, prompt belt replacement is recommended¹³.

6PK2260 as a standalone compatibility question. Separately, a member asked directly whether the 6PK2260 belt specification is a valid aftermarket option for the X80's serpentine belt, without reference to the OEM-vs-Mazda mix-up above. No definitive answer was given in that thread — treat 6PK2260 fitment as needing verification against the owner's manual or a confirmed OEM cross-reference before ordering, consistent with the general caution above¹⁴.

Tension roller (ролик натяжителя) part number. The belt tension roller part number is 5CA015980ROLL, available via Ozon and KitZapchasti. Separately, the availability of the power-steering roller specifically (as opposed to the belt tensioner) is unclear from aftermarket listings — it may only be sold bundled as part of a complete power-steering pump assembly rather than standalone^15161718.

Post-replacement squeaking — tensioner-roller bearing, not the belt. After replacing the drive belt, if squeaking or rustling noise appears, the cause is more often the tensioner roller bearing than the new belt itself; the bearing may need replacement rather than the belt being at fault^9101112.

Dongil 6PK2263 — recommended aftermarket replacement belt. A specific aftermarket belt recommendation: Dongil 6PK2263 (2263mm length, 6-rib profile) — matching the 2263mm factory length confirmed elsewhere on this card. Critical: length should not be shorter than 2263mm or the belt will be over-tensioned. Installation should be snug/tight. Owners report this spec eliminates squealing noise reported with inferior aftermarket alternatives. Price context: search current listings as of 2025-05-05^19202122.

6PK2263 — another confirmation with sourcing/availability detail. A separate exchange again confirms the correct belt as Dongil 6PK2263, described as inexpensive but good quality; confirmed compatible with both pre-facelift and facelifted models. Stock was confirmed available through Saratov-based merchants in the Russian market, with roughly a 1-month lead time if ordered^{2324252627282930313233343536373839404142}.

Squealing belt — temporary fix vs. root cause (earlier report). Belt squealing can be temporarily silenced with silicone spray, but this is not a permanent fix. The root cause should be addressed by checking belt tension and inspecting the belt for wear/cracking⁴³⁴⁴.

Tensioner/idler pulley — part number 1023035-37K, smooth vs. grooved variant. The correct serpentine-belt tensioner (idler guide pulley) is FAW part 1023035-37K, identifiable by its smooth rolling surface — a separate part number from the tension-roller part (5CA015980ROLL) already documented on this card. A similarly numbered variant exists that is 3mm shorter and has a grooved surface; that grooved variant is harder to install and should be avoided. Installation of the correct smooth pulley requires no special tools^{4546474849505152}.

Belt length restated — 2260mm factory vs. 2263-2265mm for proper tension, and installation difficulty. A separate report gives the factory belt as 2260mm, but states that proper tension in practice requires 2263-2265mm (consistent with the 2263mm OEM figure already on this card). Getting the length right matters: too short causes noise/squeaking, too long fails to tension properly. Installation is reported as difficult, sometimes taking 3-4 hours, using knee/body leverage to hold tension while rotating the crank bolt by hand^{5354555657585960616263}.

Tensioner-roller bolt can seize. The bolt holding the belt tensioner/roller can become seized or rusted; if it won't come loose with normal tools, destructive removal techniques may be required. After removal, inspect the roller itself for condition before reinstalling or replacing⁶⁴⁶⁵.

Timing-belt tensioner assembly — Mazda aftermarket alternative, with a belt-size caveat. FAW part FP2487 is the complete belt tensioner assembly (not just the roller); OEM price is roughly 5,000 RUB (RU market, Jan 2026). A Mazda-aftermarket equivalent (Zentparts brand) is available on Wildberries for roughly 1,500 RUB (RU market, Jan 2026). Caution: the Mazda tensioner may require a different belt length than the FAW-spec belt (too tight or too loose with the wrong combination) — the 2260mm belt was reported as a tight-but-workable fit; verify belt/tensioner compatibility together before installing^{6667686970717273}.

Whistling generator belt on cold starts. Separately from squealing already documented on this card, a whistling noise from the generator (drive) belt during cold startup — persisting for several minutes as the engine warms — was traced to a stretched serpentine belt. Temporary relief: aerosol belt-friction treatment spray (consistent with the temporary silicone-spray fix already documented on this card). Permanent fix: replace the serpentine belt with a new one^{7475767778798081}.

Cold-start belt whistle fixed by replacing two pulleys (not the belt itself). A separate cold-start whistle case — the noise disappearing once the engine warms up — was resolved not by replacing the belt but by replacing two belt pulleys: the upper belt pulley (FAW 1023035-37K) and the belt tensioner roller (FAW 5CA015980ROLL). One owner confirmed this fix eliminated the unpleasant early-morning sound entirely. If the whistle persists after warm-up (rather than only during cold-start), that points to a different cause — such as worn rollers elsewhere or insufficient lubrication — and this pulley swap should not be assumed to be a universal fix^828384858687.

Serpentine belt part number for the manual-transmission restyled model — 6PK2263. A separate, earlier confirmation adds a specific part number to the belt-length figures already on this card: 6PK2263 is the serpentine (drive) belt for the manual-transmission, restyled (facelift) X80. This belt tensions multiple accessories — the alternator, power-steering pump, and water pump — consistent with the multi-component belt routing already discussed on this card⁸⁸⁸⁹.

Serpentine belt part number — 5DA015909, with/without tensioner-roller SKU split. A separate, later-confirmed part number for the FAW Besturn X80 serpentine belt (gasoline engine): 5DA015909, available both with and without the tensioner roller as separate SKUs — worth checking which listing is being ordered. Widely available through Chinese parts suppliers⁹⁰⁹¹.

Idler and tensioner roller cold-start squeak — independent confirmation with Ozon links, from the second Telegram group. A separate community (FAW BESTURN X80 group) independently confirms the same fix already documented on this card (replacing the upper pulley and tensioner roller resolves cold-start squeaking): one owner replaced only the rollers, leaving the original tensioner lightly lubricated. Idler/guide roller (обводной ролик): HQ-mech HQ115940, available on Ozon. Belt tensioner roller (ролик натяжителя приводного ремня): FAW X80 5CA015980ROLL, also on Ozon — matching the part number already documented on this card. Upper accessory pulley: part 1023035-37K is available but flagged as a quality risk — one owner's unit started whistling after just 2,000 km, attributed to insufficient bearing lubrication; the recommendation is to source the HQ-mech brand where possible instead. Cold-weather squeaking on an otherwise healthy setup is described as normal^{9293949596979899100101102103104}.

Media

Close-up photo of the serpentine belt showing part number markings (6PK2263) etched into the rubber surface

Silent video showing belt area with squealing noise

Side-by-side comparison of correct smooth tensioner pulley (marked 02) versus incorrect grooved variant (marked 06), showing the surface-finish difference

Second comparison photo of the smooth vs. grooved tensioner pulley variants

Screenshot from KitZapchasti catalog showing tension roller part 5CA015980ROLL with product photo and details

Technical diagram showing belt routing and tensioner roller position

Related pages

• Drive belt kits and rollers — listings, prices
• Generator (alternator) belt removal procedure
• Mazda 6 GG shocks, forks and part numbers
• Engine mounts — part number and alternatives
• Heater core — part number and alternatives

Sources

This page is compiled from 104 community messages. Every fact carries a numbered reference to its original author and message.

Last updated: 2026-10-29