# Service bulletin 07\-001\-21\-3775

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.

- Type: Service bulletin
- NHTSA id: 10186701
- Published by NHTSA: 2021\-02\-05
- Manufacturer's number: 07\-001\-21\-3775
- Manufacturer's date: 2021\-01\-26
- NHTSA component: EQUIPMENT

## NHTSA's summary

A musty/mildew type odor may come from the vents when the air conditioning \(A/C\) system is operating. It is most noticeable when the A/C is first turned ON. This odor is the result of mold growth in the A/C evaporator/cooling unit which is caused by condensation, dust, and pollen within the cooling unit. This condition is usually worse during high humidity conditions. “Mazda Air Cooling Coil Coating” is available to encapsulate the mold to reduce odors. If the product is properly applied, it can effectively reduce the musty/mildew odor for up to three years.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10186701-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10186701-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Equipment and accessories

## Vehicles listed

- 1998 to 2002 MAZDA 626
- 2003 MAZDA 626
- 2016 to 2021 MAZDA CX\-3
- 2020 to 2021 MAZDA CX\-30
- 2013 to 2021 MAZDA CX\-5
- 2007 to 2012 MAZDA CX\-7
- 2007 to 2021 MAZDA CX\-9
- 2011 to 2014 MAZDA MAZDA2
- 2004 to 2021 MAZDA MAZDA3
- 2006 to 2015 MAZDA MAZDA5
- 2003 to 2021 MAZDA MAZDA6
- 2007 to 2015 MAZDA MAZDASPEED3
- 2006 to 2007 MAZDA MAZDASPEED6
- 1999 to 2005 MAZDA MIATA
- 1997 to 2002 MAZDA MILLENIA
- 1998 MAZDA MPV
- 2000 to 2006 MAZDA MPV
- 2006 to 2021 MAZDA MX\-5
- 1998 to 2003 MAZDA PROTEGE
- 2002 to 2003 MAZDA PROTEGE 5

## Recalls for the same vehicles and component

- [04V282000](/recalls/nhtsa/04V282000.md), 2004-06-10: EQUIPMENT:OTHER:LABELS
- [04V109000](/recalls/nhtsa/04V109000.md), 2004-03-09: EQUIPMENT:OTHER:LABELS
- [02V078000](/recalls/nhtsa/02V078000.md), 2002-03-20: EQUIPMENT:OTHER:LABELS
- [00V301000](/recalls/nhtsa/00V301000.md), 2000-10-05: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.
- [00V113002](/recalls/nhtsa/00V113002.md), 2000-04-11: EQUIPMENT:OTHER:LABELS
- [00V113001](/recalls/nhtsa/00V113001.md), 2000-04-11: EQUIPMENT:OTHER:LABELS
- [98V243000](/recalls/nhtsa/98V243000.md), 1998-10-02: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.

## Other bulletins for the same vehicles and component

- [SA\-027\-24](/bulletins/10254187.md), 2024-05-04, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; UNKNOWN OR OTHER. Some customers may complain about infotainment center display. Peeling, spider cracks and white dots.
- [SA\-007\-24a](/bulletins/10254185.md), 2024-05-04, Service bulletin: SERVICE BRAKES, HYDRAULIC; FORWARD COLLISION AVOIDANCE; EQUIPMENT ADAPTIVE/MOBILITY. This information will give you the necessary knowledge to respond to customers concerns of Smart Brake Support \(SBS\) unintended braking. By educating the customer on the system operation, it should reduce their anxiety or distrust of the vehicle.
- [SA\-021\-24](/bulletins/10254095.md), 2024-05-03, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:INFOTAINMENT. Some customers may complain about intermittent audio no sound from the MAZDA CONNECT infotainment system and/or static noise from the speakers. The concern may be reproduced by tapping on the dash pad near the MAZDA CONNECT center display and the following DTC's may be stored. U0186:08 Communication error with audio amplifier U2145:08 Communication error with remote tuner \(RT\) U2145:02 Communication error with remote tuner \(RT\)
- [SA\-017\-24](/bulletins/10252509.md), 2024-04-03, Service bulletin: EQUIPMENT; EQUIPMENT:ELECTRICAL:INFOTAINMENT; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. 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\-24a](/bulletins/10251391.md), 2024-03-06, Service bulletin: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. 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\-24](/bulletins/10251390.md), 2024-03-06, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. 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\-24](/bulletins/10251373.md), 2024-03-06, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
- [SA\-008\-24](/bulletins/10251368.md), 2024-03-06, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT. Use the symptom troubleshooting tables below to diagnose MAZDA CONNECT concerns.
- [09\-001\-24](/bulletins/10249499.md), 2024-02-01, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM; UNKNOWN OR OTHER. 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\-23a](/bulletins/10248394.md), 2024-01-06, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. 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

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