Right Side Curtain Airbag - 2018 Mustang

The right side curtain airbag for the 2018 Ford Mustang S550 platform protects occupants during side impacts and rollovers, deploying from the headliner along the passenger window. Interchanging with 2015-2023 Mustang coupes, this module typically carries Ford numbers JR3Z-78042A74-A (2018+) or superseded FR3Z-78042A74-A. When junkyard sourcing, inspect the nylon canopy for UV degradation, moisture staining, or deployment residue, and verify the inflator serial against NHTSA recall lists (Takata campaigns affected some 2015-2017 units). Installation requires disconnecting the battery for 30+ minutes, removing A/B/C pillar trim, and carefully routing the tensioner cable without kinking. Never probe the initiator with a multimeter. Common failures include torn mounting tabs at the C-pillar, brittle connector clips from heat cycling, and internal open circuits from prior minor impacts triggering fault codes B0094 or B0095.