Front brake discs

Tags: #brake-disc · #front-axle · #mazda-6-compat · #part-number

OEM part numbers (pre-restyling vs restyle)

X80 front brake discs have two different OEM part numbers depending on generation: - Pre-restyling X80: front disc 5DA033251.¹² - Restyle X80 (2018+): front disc 5DA133251.¹

Both are 299 mm diameter, but restyle and pre-restyle discs have different internal design/part numbers — they are not interchangeable by number, though some owners report both fitting across generations with correct adapter rings.³⁴ One owner adds more nuance: 5DA033251 is the disc that also fits the Mazda 6 GG, while 5DA133251 is the "native" restyle-only part — in practice several owners consider the two functionally interchangeable despite the different numbers, though this view is not universal (see the cross-compat note above).⁵⁶

The baseline OEM rear disc number (for reference) is 5DA026251.⁷

Overall disc spec: 299 mm diameter, 25 mm thickness for the front disc (confirmed independently by two owners).⁸⁹

Mazda cross-compatibility

Several owners confirm Mazda 6 discs work as direct alternatives to the FAW front disc: - Mazda 6GG discs reported as fitting front FAW X80 discs directly.¹⁰ - Mazda 6 (GH generation, 2002–2007) front discs, 299 mm / 25 mm, cross-ref to part Nisshinbo ND5024K; verified compatible and installed successfully by a community member, cross-checked via the DRIVE2 parts database.¹¹¹²¹³ - Specific branded options confirmed compatible: Marshall M2000480 (ventilated, sold on Ozon) and Sangsin Brake SD4417 (also sold as Hi-Q SD4417, pricier than the Marshall).^9141516 - Other Mazda 6 cross-reference numbers mentioned (fitment not fully confirmed): DF4974S, G33Y3325X, G33Y3325XA.¹⁷¹⁸

Mazda 6 disc + caliper as a combined upgrade (early report, Sept 2024)

Independent of the individual Mazda 6 disc cross-references above, an earlier community discussion frames the swap as a combined disc + caliper upgrade: Mazda 6 (especially the GG series and earlier) discs and calipers together are reported as mechanically compatible with the X80, with the Mazda discs slightly larger in diameter. This combined cross-fit is presented as a fix for the known front-pad-rattle design flaw (see the front-brake-pads card's "upper holes need 133.1mm" section) — since swapping in the Mazda caliper alongside its disc avoids the pad-width mismatch entirely, rather than hunting for a correctly-sized 133.1 mm pad. Installation requires fitting the Mazda caliper as well as the disc, not just a disc swap on the stock caliper.^19202122

Pricing (RU market)

As of 2024-09-13, Irkutsk supplier kitzapchasti.ru: - Front disc 5DA033251 (pre-restyling): 1900 RUB (RU market, Sept 2024). - Front disc 5DA133251 (restyle): 2330 RUB (RU market, Sept 2024).²³²⁴²⁵

REMSA-brand discs were also mentioned as available from other suppliers around the same time, without a confirmed price.²³

SP2449 was separately mentioned by one owner as a recommended alternative disc option, rated as more trustworthy than the "Comi One" brand (incomplete website/support); note this code is also used elsewhere in the community for a Hi-Q brake pad, so treat SP2449 with care and verify the product category before ordering.²⁶

Quality warning

Zecer-brand front discs are reported as poor quality: one owner had a Zecer disc crack completely after only 10,000–12,000 km, becoming unusable. Community consensus strongly advises against Zecer brake discs.²⁷²⁸²⁹

Wear limit and disc-retaining screws

• Discs are unsafe once worn below 23 mm thickness — this is the absolute minimum for the X80.³⁰
• The disc is held to the hub by three small screws torqued to ~15 Nm. These screws only stop the disc falling off during assembly — the actual clamping load comes from the wheel bolts once installed. Over-torquing these screws to 30+ Nm can cause the disc to seize onto the hub. If over-torqued, removal may need an impact driver/wrench, heat, or (as some owners prefer at replacement time) simply drilling the screws out.³¹³²

Maintenance notes / troubleshooting

• Noise at 90+ km/h that scales with wheel speed and is independent of braking usually indicates corrosion/scale buildup (окалина) on the disc rim. Fix: remove the wheel, inspect the disc edge for a corrosion ridge, and knock the oxidation off with a hammer. Also check that the anti-squeal backing plate is seated straight — if mounted crooked it can contact the disc during rotation and cause noise too.^333435363738
• Mixed-manufacturer front discs: even with the same part number, discs from different manufacturers can have different friction coefficients — one owner noticed two "identical" discs had different paint in the non-working zone, indicating different makers. In theory this could cause uneven braking; in practice several owners report it works fine (pads "bed in" to each disc), but it should be monitored. Community is split on how much this matters.^{39404142434445464748}
• If the disc is seized/rust-stuck to the hub, use a proper mechanical brake disc puller tool, not a hammer.⁴⁹⁵⁰

2025 part-number and pricing consolidation (BN-1655, Lynx)

By mid/late 2025 the community settled on a widely-cited front disc part number and brand: - BN-1655 (front) / BN-1651 (rear) — sold under the Lynx brand; confirmed as a perfect fit replacing both front and rear discs together.^{5152535455565758596061} - Lynx BN-1655 front disc pricing: 4,257 RUB (Ozon, RU market, Sept 2025); 2,800 RUB (RU market, Sept 2025) on Wildberries via seller "apstore" — one owner got a second car's discs at that lower price on the same day, same seller.^{62636465666768} - General OEM front/rear disc sourcing note: multiple Chinese-supplier and local-retailer options exist; disc sizing is consistent across model years for a given generation (see the rest/doreset part numbers above).^{69707172737475}

Mazda GH cross-fit reconfirmed, restyled fitment, and pricing (Sept 2025)

• Mazda 6 GH front discs fit the restyled X80 directly — one owner states this generation (not GG) is the correct cross-reference for discs.⁷⁶⁷⁷⁷⁸
• LYNXAUTO-brand Mazda 6 GH front discs available on Wildberries/Ozon for ~4,200 RUB (RU market, Sept 2025); the community recommendation is to "buy without hesitation."⁷⁹⁸⁰⁸¹
• Original (OEM-sourced) disc option via Kitparts: 2,800 RUB (RU market, Sept 2025), but with a ~1-month factory delivery wait; these arrive pre-painted from the factory, a quality detail that's uncommon among aftermarket options.⁸²⁸³⁸⁴

Sizing conflict: undersized pads on 300 mm aftermarket discs

One owner installed SNLS 300 mm front discs and found the accompanying pads seemed undersized for the disc's pad area, raising the question of whether +5 mm larger pads could be sourced as an upgrade; this remains unverified — it's unclear whether larger pads are a direct bolt-on or would require caliper modification.⁶⁹⁷⁰⁸⁵ Conflict/uncertainty: no other owner in this thread confirmed a larger-pad option exists; treat as an open question rather than a recommendation.

Front disc diameter emphasized: 299 mm is mandatory

Reconfirming the 299 mm spec above: one owner specifically asked about a disc offered at a smaller diameter and was warned it does not fit — FAW X80 front discs must be 299 mm; smaller discs (e.g. 280 mm) cause pad misalignment and uneven pressure distribution. Always double-check diameter, not just part number, before ordering.^86878889

Front disc longevity report

One owner's original front discs lasted to 255,000 km before replacement — a useful upper-bound data point for expected disc life.⁹⁰⁹¹ Separately, another owner reports having to replace front discs at only ~48,000 km, suggesting individual driving style and disc-brand quality can produce a very wide range in practice; monitor disc thickness at regular maintenance rather than assuming either extreme is typical.⁹²

Restyled-model hub mismatch — pre-restyle discs don't fit

Original brake discs from a pre-restyle model do not attach properly to a restyled (post-restyle) model's hub — the hub mounting interface differs between generations. M8 disc-retaining screws physically fit, but threading/seating on the restyled hub prevents proper seating of a pre-restyle disc. Always match the disc generation to the hub generation, not just the bolt pattern.⁹³⁹⁴

Brand alternatives compiled by one owner (Mazda GH-spec cross-reference)

For front discs cross-referenced to Mazda GH spec (part G33Y-33-25XA): SANGSIN SD4417 (Hi-Q), MARSHAL M2000480, PATRON PBD1515, ZEKKERT BS-5162; ATE also mentioned as an option.⁹⁵

Full brake-system upgrade — total cost breakdown

A full four-wheel pad+disc upgrade totaled roughly 18,000 RUB (RU market, July 2025) for one owner; another owner who replaced front pads only spent about 9,000 RUB (RU market, July 2025). Parts were sourced across Ozon, Yandex Market, and Wildberries, comparing prices between the three. Marshal-brand discs were a popular choice among community members — one owner paid ~500 RUB more (RU market, July 2025) than the cheapest Marshal listing specifically to get discs that come factory-painted (corrosion protection), and emphasizes selecting by exact disc dimensions rather than by price alone. Pad brand/model choice is described as "personal taste" — the practical approach is reading Ozon, Yandex Market, and Wildberries reviews before buying rather than relying on a single recommended brand.⁹⁶⁹⁷⁹⁸

Mazda 6 GH front disc brand options — NiBK RN1515DSET and Tayga (Jul 2026)

Continuing the Mazda 6 GH cross-reference documented above, community members compiled specific perforated/ceramic disc listings while shopping for a front hub replacement: NiBK Performance RN1515DSET (a sport/perforated disc for Mazda 6 GH, sold on Ozon) received mixed reviews — not universally recommended. Tayga BDF043 perforated discs (299×25 mm, Mazda 6 GH fitment, sold on Avito) received positive feedback, with one owner reporting 30,000+ km with no issues after buying from the same seller. Community advice remains to cross-check against a Mazda-sourced equivalent (e.g. via Emex) and compare part numbers before committing to either option.^{99100101102103104105106107108}

Field report: SD4417 + SP2449 combo — 21,000 km including mountain driving

One owner reports 21,000 km on the Sangsin Brake SD4417 front disc (see the Mazda cross-compatibility brand list above) paired with Hi-Q SP2449 pads (see the front-brake-pads card for the pad's own fitment/part notes), across two vacations of mountain-pass (serpentine) driving. Result: very satisfied — discs remain flat with no grooves or chips, only a barely audible whistle under heavy heat. Rated as an excellent price/quality combination. By contrast, the same car's original (OEM) discs and pads wore unevenly and needed replacement by 48,000 km.¹⁰⁹

NiBK RN1515DSET with PN8009 pads fitted (Oct 2026)

One owner fitted the NiBK front disc set RN1515DSET with pads PN8009 (the "DSET" suffix most likely means a disc set; inferred, not stated). This adds a positive field fitting to the mixed reviews above; see the drilled and perforated discs card for photos and opinions on perforated discs.¹¹⁰¹¹¹

Catalogue split, fitment reports and judder fix (2024–2025)

• A commenter reads the catalogue as: 5DA133251 is the facelift (рест, "NEW") front disc and 5DA033251 the pre-facelift (дорест) one; he adds that 033 is also listed as a rear disc in some catalogues, possibly a typo.²⁴ Another member calls 5DA033251 the analog of the original 5DA133251, says the disc cross-references between the X80 and the X80 NEW and that it is 299 mm on both; a buyer in the same family received smaller-diameter discs, which the 299 mm member takes to be a wrong item sold.^1121133
• Front discs that began to judder (бьют) when braking from speed: members suggested Marshall front discs for the X80 (Mazda 6 GH), SD4417, with SP2449 pads. The owner who fitted them reports ~21,000 km with no grooves or chips, a near-perfect surface match and only a faint squeal under heavy heat on mountain roads; another member fitted a disc from a different product link and reports ~30,000 km with no problems.^114115109
• Front disc numbers listed for the X80 / Mazda 6 GH: Marshall 5DA026251, G33Y3325X, G33Y3325XA and SD4417, plus TRW DF4974S listed as a Mazda 6 GH disc.¹¹⁴ The Lynx BN-1655 (Mazda 6 GH) carries OEM number G33Y3325X (Ozon listing, October 2025).¹¹⁶
• NiBK on Ozon: RN1516DSET (front perforated disc for Mazda Atenza / CX-5) and NiBK Performance RN1515DSET (front sport disc for Mazda 6 GH); a member reports poor reviews for the sport disc, and X80 fitment is not confirmed. See also drilled and perforated discs.^117118107

Prices, brands and life reported in the Sept 2024 thread

• Slotted or vented front discs start at about ~15,000 RUB (RU market, Sept 2024) and a full front brake upgrade (calipers and discs) from about ~180,000 RUB (RU market, Sept 2024); the unit of both figures is inferred from context. The owner thinks slotted or drilled discs make no real difference in normal driving.¹¹⁹
• The owner says a dealer quoted its own cost for the discs at ~5,000 RUB and sells them at ~7,000–8,000 RUB (RU market, Sept 2024); the dealer promised parts close to original quality, while a commenter says the cheap new discs are a soft alloy that warps after the first puddle and wears fast.¹²⁰¹²¹
• REMSA discs and pads are reported both ways: one commenter says they wore out quickly and were poor quality; another says they are good, and a third reports a REMSA set past 100,000 km with a small lip that can be sanded off and says 50,000 km or more is safe. The owner notes REMSA is not stocked in Irkutsk or Novosibirsk.^122123124
• At about 237,000 km the owner says his original front pads lasted ~140,000 km and he has since gone through several sets of aftermarket pads (his messages say both a third and a sixth set); the original discs still have ~3 mm of lip, which he does not consider worn out.¹²⁵¹²⁶

Media

Photo of a brake disc being checked against the required 299 mm diameter spec

Photo comparing the restyled-model hub (bottom) against the original pre-restyle disc, showing the M8 bolt-hole pattern/seating mismatch

Comparison photo of two front brake discs side-by-side with part numbers 5DA033251 (pre-restyling, 1900 RUB) and 5DA133251 (restyle, 2330 RUB), from the kitzapchasti.ru catalog

Photo of a corroded/rusted brake caliper guide pin removed for cleaning

Photo showing the three small brake disc retaining screws before removal

Photo of a mechanical brake disc puller tool used to remove a disc seized to the hub

Related pages

• Drilled and perforated brake discs
• Front brake pads
• Rear brake discs — type, thickness, Mazda cross-compat
• Brake pads, discs & caliper parts
• Parts suppliers and catalogs directory (Russia)

Sources

This page is compiled from 126 community messages. Every fact carries a numbered reference to its original author and message.

Last updated: 2026-10-29