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Service bulletin MT-002-21a

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 id10202695
Published by NHTSA2021-10-31
Manufacturer's numberMT-002-21a
Manufacturer's date2021-10-13
NHTSA componentFUEL SYSTEM, GASOLINE; FUEL SYSTEM, OTHER

NHTSA's summary

Ethanol is becoming a common additive in gasoline. Gasoline containing ethanol is likely available at your local gasoline station. Typical blends of ethanol include E10 and E85. E10: A blend of 10% ethanol and 90% gasoline. E85: A blend of 85% ethanol and 15% gasoline All Mazda vehicles can run on gasoline containing up to 10% ethanol (E10) but only some 1999-2001 B3000 trucks can run on gasoline with more than 10% ethanol blended. E10 compatible vehicles: All Mazda vehicles. E85 compatible vehicles: 1999-2001 B3000 Mazda trucks with the 8th VIN digit is V.

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

Fuel system

Vehicles listed
MAZDA CX-32016, 2017, 2018, 2019, 2020, 2021
MAZDA CX-302020, 2021
MAZDA CX-52013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
MAZDA CX-72007, 2008, 2009, 2010, 2011, 2012
MAZDA CX-72013
MAZDA CX-92007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
MAZDA MAZDA22011, 2012, 2013, 2014
MAZDA MAZDA32004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
MAZDA MAZDA52006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
MAZDA MAZDA62003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
MAZDA MX-52006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
MAZDA RX-82004, 2005, 2006, 2007, 2008, 2009, 2010, 2011

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

Recalls for the same vehicles and component
20216962021-11-12. Fuel System
21V8750002021-11-12. FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
20215902021-09-24. Fuel System
21V7440002021-09-24. FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
20202652020-06-12. Fuel System
20V3470002020-06-12. FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
20172892017-06-01. Fuel System
17V3540002017-06-01. FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
20165682016-11-15. Fuel System
16V7930002016-10-31. FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

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
SA-032-262026-06-04. Service bulletin. This SA supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-011/25 10/16/25 and 02/27/25 DESCRIPTION Some customers will report that their fuel door (AKA, fuel filler door, fuel lid, and fuel-filler lid) was stuck closed and would not open to refuel the vehicle. Follow the repair steps below unless the conditions outlined in TSB 09-007/25 - FUEL-FILLER LID PANEL IS DEFORMED for 2019-2025 Mazda3 and 2020-2025 CX-30 are present. REPAIR PROCEDURE 1. Check for pry marks around the door opening. Are there any pry marks? YES: This is due to outside influence and is not covered by Mazda warranty. NO: Continue to the next step. 2. Check the fuel door lock operation. a. Lock the doors and verify if the fuel door lock is locking. NOTE: The default setting is a 90-second delay after the doors lock, but the customer can set that to 0, 30, 60, 90, or 120 seconds. b. Unlock the doors and verify if the fuel door lock is unlocking. NOTE: There is no delay to this function, but the fuel door must be locked to confirm it is unlocking. See the lock note above. Is the fuel door lock operation working correctly? YES: The fuel door repair IS NOT covered by Mazda warranty. The fuel door lock is OK and the door was damaged because the vehicle was not unlocked. NO: The fuel door repair IS covered by Mazda warranty. The fuel door lock is NOT OK and damage to the door was done in order to access the lock. NOTE: If the door was already broken when it arrived at the dealership, Mazda will pay for the fuel door repair under warranty if the vehicle does NOT have an emergency release. Mazda will NOT pay for the fuel door under warranty if it has an emergency release.
SA-023-262026-05-04. Service bulletin. This Service Alert supersedes the previously issued M-Tip(s) listed below. The changes are noted in Red text. MT-003/22 03/02/22 DESCRIPTION Some customers may complain about a tapping or knocking noise coming from the rear seat after fuel fill. The concern will likely occur if the fuel tank is overfilled (more fuel is added after the fuel pump nozzle shuts off automatically) or filled up normally in high ambient temperatures and the fuel expands. No repair is needed. Explain to the customer not to continue filling after nozzle shut off.
CSP122024-12-04. Warranty extension. CUSTOMER SERVICE PROGRAM CSP12 - DENSO LOW-PRESSURE FUEL PUMP CUSTOMER SERVICE PROGRAM WARRANTY EXTENSION: Attention ALL Mazda Dealers: This is a Warranty Extension and not a recall campaign. Repairs are not to be made unless there is a confirmed low-pressure fuel pump failure within the coverage period. As of November 18, 2024 Repair Procedures and Parts and Warranty documents are available.
CSP12 Repair2024-12-04. Warranty extension. CUSTOMER SERVICE PROGRAM CSP12 - DENSO LOW-PRESSURE FUEL PUMP CUSTOMER SERVICE PROGRAM WARRANTY EXTENSION: Attention ALL Mazda Dealers: This is a Warranty Extension and not a recall campaign. Repairs are not to be made unless there is a confirmed low-pressure fuel pump failure within the coverage period. As of November 18, 2024 Repair Procedures and Parts and Warranty documents are available.
CSP12 Repair MX52024-12-04. Warranty extension. CUSTOMER SERVICE PROGRAM CSP12 - DENSO LOW-PRESSURE FUEL PUMP CUSTOMER SERVICE PROGRAM WARRANTY EXTENSION: Attention ALL Mazda Dealers: This is a Warranty Extension and not a recall campaign. Repairs are not to be made unless there is a confirmed low-pressure fuel pump failure within the coverage period. As of November 18, 2024 Repair Procedures and Parts and Warranty documents are available.
CSP12 Parts Warr2024-12-04. Warranty extension. CUSTOMER SERVICE PROGRAM CSP12 - DENSO LOW-PRESSURE FUEL PUMP CUSTOMER SERVICE PROGRAM WARRANTY EXTENSION: Attention ALL Mazda Dealers: This is a Warranty Extension and not a recall campaign. Repairs are not to be made unless there is a confirmed low-pressure fuel pump failure within the coverage period. As of November 18, 2024 Repair Procedures and Parts and Warranty documents are available.
CSP12 FAQs2024-12-04. Warranty extension. CUSTOMER SERVICE PROGRAM CSP12 - DENSO LOW-PRESSURE FUEL PUMP CUSTOMER SERVICE PROGRAM WARRANTY EXTENSION: Attention ALL Mazda Dealers: This is a Warranty Extension and not a recall campaign. Repairs are not to be made unless there is a confirmed low-pressure fuel pump failure within the coverage period. As of November 18, 2024 Repair Procedures and Parts and Warranty documents are available.
CSP12 Dealer Letter2024-12-04. Warranty extension. CUSTOMER SERVICE PROGRAM CSP12 - DENSO LOW-PRESSURE FUEL PUMP CUSTOMER SERVICE PROGRAM WARRANTY EXTENSION: Attention ALL Mazda Dealers: This is a Warranty Extension and not a recall campaign. Repairs are not to be made unless there is a confirmed low-pressure fuel pump failure within the coverage period. As of November 18, 2024 Repair Procedures and Parts and Warranty documents are available.
SA-059-242024-09-04. Service bulletin. Some customers will report that their fuel door was stuck closed and would not open to refuel the vehicle. Follow the repair steps below unless the conditions outlined in TSB 09-019/21 - FUEL-FILLER LID PANEL IS DEFORMED for 2019-2021 Mazda3 and 2020-2021 CX-30 are present.
09-040-232023-12-05. Service bulletin. When opening the fuel-filler lid to refuel, some customers may notice water and/or sand in the fuel-filler lid box area. They may complain about dried sand causing poor appearance.