Filter, passenger compartment air

Years 1998, 2000–02, 2014, 2025–27 Models 4 Factory citations 7

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Also described as Air filter, particleAir filter, pollutantFilter, air, pollutant

Also documented for Cadillac Chevrolet GMC Oldsmobile Pontiac

Documented applications

Encore — Gamma II (2013–2022)

2014 Factory-verified

all trims: S; the 2018–2019 guides print KRH for this item

GM factory document — 2014 buick encore fleet order guide wayback, p.2.

Encore GX — VSS-F (2020–2027)

2025–2027 Factory-verified

Preferred, Sport Touring: S

GM factory document — 2025 buick encore gx fleet order guide, p.1.
GM factory document — 2026 buick encore gx fleet order guide, p.1.
GM factory document — 2027 buick encore gx fleet order guide, p.1.

LeSabre — H-body (2000–2005)

2000–2002 Factory-verified

GM factory document — 2000 buick lesabre rpo code list, p.1.
GM factory document — 2002 buick lesabre rpo code list, p.1.

Park Avenue — G-body (1997–2005)

1998 Factory-verified

GM factory document — 1998 buick park avenue rpo code list, p.1.

This page aggregates every documented appearance of K12 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.