First-Generation FR-S/BRZ/86 Rear Links, Trailing Arms and Toe Eccentrics

OEM numbers

Subaru BRZ: rear trailing link 20250CA000, same LH/RH and quantity twoforward/front lateral link within the rear suspension 20250FG021, same LH/RH and quantity tworear lateral link 20250CA010 -> 20250FG042, same LH/RH and quantity two. Upper RH/passenger 20252FG000 -> 20252FG001

upper LH/driver 20252FG010 -> 20252FG011. Toe cam bolt 901700154, self-lock nut 902330006 and cam washer 903120003, quantity two each. Separate Subaru bushings 20254FG020, 20254AE020 and 20254CA000. Scion FR-S/Toyota 86: No.1 rear arm SU003-00360, No.2 rear arm SU003-00361 -> SU003-04490 and toe-control link SU003-00362, each side-neutral in the checked catalog. Upper RH/passenger SU003-00363 -> SU003-07492

upper LH/driver SU003-00364 -> SU003-07493. Toe-adjust cam bolt SU003-02854, M14 lock nut SU003-02865 and cam washer SU003-02904. Separate Toyota bushings SU003-00365, SU003-00366 and SU003-00367.

Supersession

Subaru 20250CA010 -> 20250FG042; RH upper 20252FG000 -> 20252FG001; LH upper 20252FG010 -> 20252FG011. Scion/Toyota No.2 rear arm SU003-00361 -> SU003-04490; RH upper SU003-00363 -> SU003-07492; LH upper SU003-00364 -> SU003-07493. No cross-badge arrows and no supersession is asserted for the other links, bushings or hardware.

Fitment

Choose badge/VIN, production date, link position and side before ordering. The three lower links are side-neutral within each checked badge catalog; upper arms are side-specific. In Subaru's rear-suspension diagram, the forward/front lateral link is still a rear-axle component; seller labels do not control position. Confirm complete assembly versus loose bushing, exact installed number and included hardware. Performance-package name alone does not select an arm; the checked 2019 Toyota catalog retained the same arms while package-specific dampers branched separately. Disturbing a link or eccentric requires rear-alignment inspection/adjustment. Order SU003-00366 by diagram position because catalogs use multiple descriptions. Do not infer cross-badge or second-generation interchange from appearance or seller fitment.

Aftermarket options

New OEM and exact-number used/recycled arms are the checked stock-service paths. Aftermarket adjustable toe/camber arms, spherical/polyurethane upgrades, coilovers and second-generation conversions are outside this guide. Used arms require exact installed-number verification and inspection for bending, cracks, corrosion, torn/seized bushings, eccentric-slot damage and missing hardware.

Before you buy

Match badge/VIN, production, rear-link position, upper-arm side, installed number, bushing condition and included hardware. Subaru and Toyota numbers are not presented as interchangeable. Seller fitment labels can conflate link positions and generations. Replace damaged or seized alignment hardware as directed by the vehicle-specific procedure and perform an alignment after disturbance. Adjustable/solid aftermarket arms and second-generation conversions are outside this stock-service guide.

Research and fitment sources

Supersede reviewed 19 unique research sources for this guide. 9 also appear above as a seller or official action and are not repeated here; 10 additional citations follow.

Research last verified 2026-07-27.