{"nhtsa_id":11034436,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-07-03","date":"2026-06-18","document_id":"09-019-26","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; UNKNOWN OR OTHER; ENGINE","mfr_system":"Door Lock","summary":"This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red. 09-012/21 12/13/21, 06/10/21 and 04/27/21 DESCRIPTION Some customers may experience all of following symptoms: The door lock/unlock operation will not work using the remote transmitter button. 1. The door lock/unlock operation will not work using the door lock/release touch sensor. 2. The engine will not start using the ignition switch. 3. The transmitter operates by itself. 4. The key battery drains faster than usual. 5. Symptoms 1-3: This may be caused when excess load is applied to the remote transmitter, deforming the electrical terminals and creating poor contact with the battery. To eliminate this concern, the structure in the remote transmitter has been modified to reduce the deformation of the electrical terminals. Symptom 4-5: This may be caused when excessive load is applied to the remote transmitter, creating a gap around the gasket where moisture enters and corrodes the circuit board which in turn drains the key battery faster than usual. To eliminate this concern, the thickness of the case wall on the gasket mounting surface has been increased and the bonding strength of the components has been improved to prevent deformation. REPAIR PROCEDURE • If the battery is bad or installed incorrectly, replace the battery and/or install it correctly. • If the remote power saving function is off and the battery is good and installed correctly, replace the defective remote transmitter with a modified one according to the instructions on MGSS (IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING). NOTE: DO NOT replace other remote transmitter(s) for the vehicle if they not experiencing an issue.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034436-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11034436-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11034436","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MAZDA","model":"CX-3","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_mazda_cx-3"]},{"make":"MAZDA","model":"CX-30","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_mazda_cx-30","2021_mazda_cx-30"]},{"make":"MAZDA","model":"CX-5","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_mazda_cx-5"]},{"make":"MAZDA","model":"CX-9","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_mazda_cx-9","2021_mazda_cx-9"]},{"make":"MAZDA","model":"MAZDA3","year_from":2019,"year_to":2021,"match":"exact","vehicle_ids":["2019_mazda_mazda3","2020_mazda_mazda3","2021_mazda_mazda3"]},{"make":"MAZDA","model":"MAZDA6","year_from":2019,"year_to":2021,"match":"exact","vehicle_ids":["2019_mazda_mazda6","2020_mazda_mazda6","2021_mazda_mazda6"]},{"make":"MAZDA","model":"MX-5","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_mazda_mx-5"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}