R9W ✓ Factory-verified

Buick · Regular Production Option

Mobile Service Plus, deleted

Years 2025–27 Models 4 Factory citations 13

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Also described as Deleted Mobile Service PlusMobileService+, deleted

Also documented for CadillacChevroletGMC

Documented applications

Enclave — VSS-S (2025–2027) →

• 2025–2027 ✓ Factory-verified

  O on all trims

  ⛭ GM factory document — 2025 buick all new enclave fleet order guide, p.11.

  ⛭ GM factory document — 2026 buick enclave fleet order guide, p.11.

  ⛭ GM factory document — 2027 buick enclave fleet order guide, p.12.

Encore GX — VSS-F (2020–2027) →

• 2025–2027 ✓ Factory-verified

  Preferred, Sport Touring, Avenir: O

  ⛭ GM factory document — 2025 buick encore gx fleet order guide, p.12.

  ⛭ GM factory document — 2026 buick encore gx fleet order guide, p.12.

  ⛭ GM factory document — 2027 buick encore gx fleet order guide, p.12.

Envision — E2XX (2021–2027) →

• 2025–2027 ✓ Factory-verified

  2027: all trims: O

  ⛭ GM factory document — 2025 buick envision fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 buick envision fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 buick envision fleet order guide, p.11.

Envista — VSS-F (2024–2027) →

• 2025–2026 ✓ Factory-verified

  all trims: O; dealers with BFU 284 only; TRE, SRE or fleet order types

  ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 buick envista fleet order guide, p.9.

  ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 buick envista fleet order guide, p.9.

This page aggregates every documented appearance of R9W in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.