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Service bulletin 15-004-21-3835

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10203735
Published by NHTSA2021-12-02
Manufacturer's number15-004-21-3835
Manufacturer's date2021-11-16
NHTSA componentFORWARD COLLISION AVOIDANCE; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

NOTE: This Service Information is only applicable for vehicles equipped with a Forward Sensing Camera (FSC), KDD1-67-XCX and GSH7-67-XCX*. If B61L-67-XCX* appears in the GEPC search, the VIN is applicable for this repair only if the part has been previously replaced with KDD1-67-XCX. Some vehicles may exhibit the master warning light (and other warning lights) illuminated while driving, with DTC B115E:76 stored in memory.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Driver assistance, Equipment and accessories

Trouble codes named

B115E

Vehicles listed
MAZDA CX-32018, 2019, 2020, 2021
MAZDA CX-52017, 2018, 2019, 2020, 2021
MAZDA CX-92018, 2019, 2020, 2021
MAZDA MAZDA32017, 2018
MAZDA MAZDA62017, 2018, 2019, 2020, 2021
MAZDA MX-52019, 2020, 2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
23V4870002023-07-14. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
09-005-262026-02-03. Service bulletin. If the right-side Blind Spot Monitoring (BSM) control module is replaced for any reason, it is also necessary to replace the left-side BSM control module in order to complete the radar aiming procedure. If the right-side BSM control module is replaced alone, "Automatic Configuration" and "BSM Radar Aiming" cannot be completed due to a programming error in the module. In most cases, if the left-side BSM control module is replaced alone, "Automatic Configuration" and "BSM Radar Aiming" can be completed without any problem (See CAUTION below for more details). Other possible symptoms that may be found if the right-side BSM module is replaced alone: BSM aiming fails “BSM OFF" indicator ON Center Display warning message BSM failsafe (No operation) DTC U3000:54 stored in memory DTC U1A4B:54 stored in memory (CX-3, MX-5 only) NOTE: Since a new BSM control module does not retain the vehicle specification information, it is necessary to acquire and store the vehicle specification information transmitted via CAN communication from the combination meter through automatic configuration after replacement.
SA-027-242024-05-04. Service bulletin. Some customers may complain about infotainment center display. Peeling, spider cracks and white dots.
SA-017-242024-04-03. Service bulletin. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF, Climate control
SA-009-24a2024-03-06. Service bulletin. Frequently Asked Questions (FAQ): General Questions, Reception Level Inspection, Setup and Getting Started, Dealer Processes, Registration / Enrollment, TCU Activation, WI-FI General Information, Conditions for Remote Engine Start Will Not Function, WI-FI How-To Conditions for Remote Engine Start Function Will turn engine OFF, WI-FI Trial Period, Deactivation Mode, Interacting With The App, Educational Videos, Service Issues, Resources, Troubleshooting Page.
SA-009-242024-03-06. Service bulletin. Frequently Asked Questions (FAQ): General Questions, Reception Level Inspection, Setup and Getting Started, Dealer Processes, Registration / Enrollment, TCU Activation, WI-FI General Information, Conditions for Remote Engine Start Will Not Function, WI-FI How-To Conditions for Remote Engine Start Function Will turn engine OFF, WI-FI Trial Period, Deactivation Mode, Interacting With The App, Educational Videos, Service Issues, Resources, Troubleshooting Page.
SA-006-242024-03-06. Service bulletin. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
SA-008-242024-03-06. Service bulletin. Use the symptom troubleshooting tables below to diagnose MAZDA CONNECT concerns.
09-001-242024-02-01. Service bulletin. Some customers may experience a “Telematics Malfunction” message in the instrument cluster with DTC U3000:04-TCU (Telematics communication unit internal malfunction) stored in memory. This is caused by improper control software of the telematics communication unit (TCU). To eliminate this concern, the control software of the TCU has been modified.
09-001-23a2024-01-06. Service bulletin. Some vehicles may exhibit an “In Vehicle Network Malfunction” message appearing in the instrument cluster with DTC U3000:04-TCU (Telematics communication unit internal malfunction) stored after the connected service contract has been discontinued. This is caused by improper control software of the telematics communication unit (TCU). To eliminate this concern, the control software of the TCU has been modified
SA-025-23a2024-01-06. Service bulletin. When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to activate the new TCU after replacement. Use the information in this service alert to initialize the new TCU until the procedure on MGSS is updated.. CAUTION: DO NOT swap TCU with another vehicle as the TCU is VIN locked after activation. A TCU swap with another vehicle will disable Connected Services on both vehicles. If TCU activation is not performed, connected vehicle functions will not operate. This will have a negative impact on the customer because they will need to return to the dealer for repairs.