Rear arm bushings — numbers and Mazda fit

Tags: #control-arm · #bushings · #part-number · #mazda-6-compat · #rear-suspension

Rear lower longitudinal arm bushing: part number SBX80PRODZK. Clarification from the community: this is the rear longitudinal arm bushing, not a front part — some service paperwork mislabels components. The X80 has two distinct lower-arm assemblies: the front lower wishbone (with 2 bushings plus a ball joint) and the rear longitudinal arm (with 1 bushing) ¹.

Rear longitudinal arm bushing — Mazda fit confirmed long-term: rear longitudinal arm rubber bushings from Mazda fit the X80 1:1. One owner (Ayr) installed them and reports 40,000 km with no issues and good durability; cost is approximately 2,000 RUB (RU market, March 2025). Installation can be done using either KitParts-original or Mazda-sourced bushings (Masuma brand has been seen on the packaging in photos) ²³.

Front upper ball joint — Vita/B50 cross-fit: the front upper ball joint C23034250, from the FAW Vita/B50, fits the X80. As noted on the hub-bearing card, the hub assembly itself is sold only as unit 5CA033047B and is not separable. Related part numbers reported in the same source: CV boots — outer B5DA122530, inner B5CA022540; rear upper arm bushing FC0128C10; rear cross-member bushing 5CA028430ZK (also written 5CA028430) ⁴.

Rear cross-member bushing 5CA028430ZK — aftermarket incompatibility confirmed: following up on the part number noted above, aftermarket copies of the rear cross-member bushing (5CA028430ZK) turned out to have a rubber outer shell, while the OEM part has a metal outer shell — making the aftermarket version physically incompatible. One community member spent 3,500 RUB (RU market, April 2024) on the wrong aftermarket parts before catching the mismatch via comparison photos. Recommendation from this experience: buy complete assembled rear arms rather than sourcing separate rear cross-member bushings, to avoid this kind of mismatch ⁵.

Rear longitudinal-arm bushing — sourcing question resolved to Mazda 6 GG: reinforcing the rear longitudinal-arm bushing cross-fit already documented on this card, a fresh sourcing question about which bushing fits the rear longitudinal arm was answered simply: "look at Mazda 6 GG" ⁶⁷.

Rear control-arm bushings — Mazda source confirmed, described as simple: a fragment of a separate thread confirms Mazda-sourced bushings "will definitely fit" the rear control arms, with the poster noting they have only ever replaced the bushings (not the whole arm) in this way — describing the swap as "about as simple as it gets" ⁸⁹.

Rear longitudinal-arm ("eared") bushing diameter — confirmed 60mm (Mazda 6 GG), not 70mm (GH): settling a diameter question about the rear longitudinal-rod bushing — is it the Mazda 6 GG 60mm size or the GH 70mm size? — multiple owners confirm the X80's rear longitudinal-arm bushing is 60mm, matching Mazda 6 GG (not GH). One owner recently replaced it and confirms the 60mm size directly; a shrink-tube/pressing reference of 60mm was also cited. The specific part shared in the community was Masuma-brand, sourced against the Mazda 6 GG part number ^1011121314.

Rear longitudinal-arm bushing orientation — identical L/R, cone bolt-down (March 2026): the rear suspension's longitudinal control-arm bushings (silentblocks) are identical for the left and right sides — no separate L/R part numbers. Installation detail: the cone-shaped bushings must be positioned with their bolts pointing downward ¹⁵¹⁶.

Rear control-arm kit from Mazda 6 GG — initial uncertainty, then confirmed fitting: complete rear suspension control-arm kits from Mazda 6 GG (spanning GG/GH/GJ/GL generations, 2007–2023, bolts included) are sold on Ozon. An early report treated fitment to the X80 as unverified, since mounting geometry and attachment points could differ and would need manual checking. A follow-up in the same thread reports these Mazda 6 GG rear control-arm sets do fit the X80 without issues, available as a bolt-included kit on Ozon (https://ozon.ru/t/8qtbbkV) ¹⁷¹⁸¹⁹.

Rear suspension bushings (silentblocks) from Mazda fit the X80: rear suspension bushings (сайлентблоки) sourced from Mazda fit FAW X80 models ^{202122232425262728}.

Rear control arm bushings — Masuma MA-103 (Mazda 6 GG): another Mazda-6-GG cross-fit for the rear control-arm bushings/silentblocks: Masuma MA-103. Reported as indistinguishable from OEM sileblocks when bought new; this owner opted to buy a complete pre-bushed arm assembly rather than press old bushings out and rebuild ²⁹.

Rear lower control arms — Mazda 6 GG, part numbers 5CA128300 / 5CA128350: rear suspension lower control arms (рычаги под пружину) for the X80 can be sourced from Mazda 6 GG under FAW part numbers 5CA128300 and 5CA128350 (left/right pair — note these are the FAW catalog numbers cross-referenced to the Mazda-sourced part, not raw Mazda numbers). Prices vary widely by brand: ~2,000₽ for budget brands up to ~4,000₽ for quality brands like KMK; KitZap pricing was considered unreliable/inconsistent by the community ("from kopecks to space" — always verify against multiple sources) ^3031323334.

Rear suspension bushing part-number catalog (cross-brand from FAW B50): a fuller rear-bushing part-number set, several cross-referenced from the B50 platform: lower control arm bushing under the spring — 5CA028430; longitudinal control arm bushing (B50 cross-fit) — FA0128200-1; stabilizer link bushing — 5CA028156; upper control arm bushing — FC0128C10-1; rear suspension bolt — FQFD162866ZB; B50 lower control arm bushing alternative — FA0128500-1. Several of these are shared/interchangeable with the B50 ^{35363738394041}.

Rear bushing count and layout — 7 per side: the rear suspension uses 7 bushings per side total: 1 on the longitudinal control arm, and the rest split in pairs across the remaining control arms — useful as a checklist when doing a full rear-bushing refresh ⁴²⁴¹.

Rear longitudinal-arm bushing — shared with B50, part FA0128250 / FA0128200: the rear longitudinal-arm silentblock is the same part on X80 and B50 — catalog number FA0128250 (also listed as FA0128200-1), available from multiple Chinese-parts suppliers ⁴³⁴⁴.

See also: Lower control arm bushings — sourcing (overview); Front lower arm bushings — numbers and sizes; Lower arm — Mazda 6 GG platform cross-fit; Lower arm bushings — pressing vs arm swap; Lower control arm — brands and prices; Lower control arm — wear and aftermarket parts; Front upper arm — part numbers and ball joint.

Media

Mazda rear longitudinal arm bushing (Masuma brand packaging visible)

Comparison photo showing the aftermarket rear cross-member bushing's rubber outer shell next to the OEM part's metal outer shell, illustrating the incompatibility

Photo showing the location of a rear suspension bushing on the X80, shared while discussing which Mazda-sourced silentblock fits which mount

Catalog page showing rear bushing part numbers and cross-brand alternatives from Besturn B50, stabilizer links, and suspension bolts

Related pages

• X80F catalog: chassis part codes
• Rear trailing arm bushing
• Front wheel hub bearing
• Front upper arm — part numbers and ball joint
• Front lower arm bushings — numbers and sizes

Sources

This page is compiled from 44 community messages. Every fact carries a numbered reference to its original author and message.

Last updated: 2026-10-29