LPO, tires, P245/40R19, all-season, blackwall

Years 2016 Models 1

Also documented for Chevrolet

Documented applications

Regal — Epsilon II, 5th gen (2011–2017)

2016 Single-source

new for 2016, with 5XQ wheels (GM Authority 2016 changes); single-source: GM Authority 2016 changes does not credit GM

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