Check a VIN

December 13, 2021 Service bulletin

Door Lock Will Not Work Using Remote Transmitter and Engine Will Not Start: Some customers may experience...

Mazda technical service bulletin 09-012-21-3801b for 2019-2021 Mazda MAZDA3, 2020-2021 Mazda CX-5 and 2019-2021 Mazda MAZDA6 and others.

Bulletin number
09-012-21-3801b
Component
Electrical system
Summary
Door Lock Will Not Work Using Remote Transmitter and Engine Will Not Start: Some customers may experience all of following symptoms: 1. The door lock/unlock operation will not work using the remote transmitter button. 2. The door lock/unlock operation will not work using the door lock/release touch sensor. 3. The engine will not start using the ignition switch. 4. The transmitter operates by itself. 5. The key battery drains faster than usual. 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. Customers having this concern should have their vehicle repaired using the following repair procedure.

Owners of these vehicles have filed 93 complaints in the electrical category.

Vehicles covered

VIN decoder

See the problems and recalls for an exact car

Buying a used Mazda MAZDA3?

Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.

Check its history