Mazda CX-50 2023–2026 — technical service bulletin
Bulletin 09-014-26 · NHTSA communication 11032006 · issued Apr 30, 2026
Technical service bulletin
communication type
Electrical System
component
2023–2026
model years
6
vehicle entries
Official summary
Some vehicles may experience intermittent battery discharge. This may be caused by improperly installed door boots allowing water to enter into the central connectors C-22/C-23 (located near the A-pillar at the base of the left and right front doors), leading to corrosion in the connector. REPAIR PROCEDURE Replace the rear harness and the affected door harness with new ones, making sure to properly install the door boots.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.