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Service bulletins for the 2021 Mazda Mazda3

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.

634 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
02-004-222022-06-04. Service bulletin. SUSPENSION. Some customers may complain of signs of oil on the struts or shock absorbers. In most cases the oil that is present is normal, and a result of the oil that remains on the shaft during the normal sweeping process of the shaft seal. Follow the inspection guidelines below to determine if the condition is a result of the normal sweeping process or a failure of the shaft seal.
SA-034-222022-06-04. Service bulletin. ELECTRICAL SYSTEM. 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.
SA-033-222022-06-04. Service bulletin. WHEELS. Some vehicles may exhibit a steering shimmy or body vibration during the PDI test drive or during the first few miles of driving after the vehicle has been delivered to the customer due to flat spots on the tires. Flat spots on tires may be caused by improper maintenance during dealer storage (e.g.: Vehicle was left stationary for a prolonged period of time in high ambient temperatures).
SA-028-222022-06-04. Service bulletin. EQUIPMENT:ELECTRICAL:WIRELESS CHARGER/CRADLE; ELECTRICAL SYSTEM. Qi Wireless Charger Symptom Troubleshooting
SA-019-22a2022-06-04. Service bulletin. UNKNOWN OR OTHER. Mazda Connected Services Frequently Asked Questions (FAQs)
SA-017-22a2022-06-04. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT; EXTERIOR LIGHTING:HEADLIGHTS; LATCHES/LOCKS/LINKAGES:DOORS:LOCK; ELECTRICAL SYSTEM. Some customers may complain about any of the following: *Infotainment Center Display does not provide the Authorization Code during the MyMazda App Connected Vehicle enrollment. **Remote function(s) inoperative. **Engine Start / Stop **Door Lock / Unlock **Lights ON / OFF *MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ". Confirm the customer's phone and vehicle have good to strong reception during the concern as shown in the table below. **If the reception is weak, move the vehicle to a location where the reception is good to strong as shown in the table, then try to get the Authorization Code and/or operate the remote functions before proceeding to the Repair Procedure if there is still an issue. **If the reception is good to strong, proceed to the Repair Procedure.
SA-004-22b2022-06-04. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
09-017-222022-05-05. Service bulletin. STRUCTURE; EQUIPMENT. Some vehicles may have rust on the contact parts between the clips (for attaching the roof molding) and the roof panel (ditches of the roof rail). This is caused by the gap between the roof molding attachment clips and the roof panel not being wide enough to allow paint to be appropriately applied to the roof panel. To eliminate this concern, the shape of the roof molding clip has been changed to enable paint application between the clip's rib and roof during the manufacturing process.
09-015-222022-05-05. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE; LATCHES/LOCKS/LINKAGES. Some vehicles may exhibit corrosion on the liftgate lock striker. This may be caused by water penetrating from micro cracks existing on the lock striker's coating surface that reacts with zinc contained in the undercoating and produces the corrosion. To eliminate this concern, a modified undercoating has been established for the liftgate lock striker.
09-013-222022-05-05. Service bulletin. EQUIPMENT; STRUCTURE. Some customers may complain that the clip on the rear end of the rear beltline molding is loose and the molding is slightly lifted up. Due to the poor shape of the clip claws, the fitting force to the door body may decrease while in use. To eliminate this concern, the clip has been enlarged in the horizontal direction to improve the fitting force against the door body.
09-012-222022-05-05. Service bulletin. EQUIPMENT; SEATS. At PDI or when new vehicle is delivered, some customers may complain about wrinkles on the leather seat cushion and/or seat back surface. Customers having this concern should have their vehicle repaired by a qualified upholstery repair specialist using the following repair procedure.
02-003-222022-05-05. Service bulletin. STEERING. Some customers may complain that the steering wheel is off center more than 3° even when driving straight on a flat road.
SA-026-222022-05-05. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Apple CarPlay / Android Auto Frequently Asked Questions (FAQs)
SA-025-222022-05-05. Service bulletin. ELECTRICAL SYSTEM. Some customers may experience infotainment door rattle noise. Follow the repair procedure to help determine the cause.
SA-024-222022-05-05. Service bulletin. ELECTRICAL SYSTEM. Some customers may experience an infotainment sub-woofer rattle noise. Follow the repair procedure to help determine the cause.
SA-023-222022-05-05. Service bulletin. ENGINE AND ENGINE COOLING. A tapping/rattling noise may be noticed from the valve train area. This operating condition can occur on new vehicles which have been delivered to Mazda dealers (due to loading and unloading from transport trucks or customers moving their vehicles in and out of their garages to wash the vehicle, etc.). This condition may also occur if the engine is not allowed to warm up after multiple cold starts.
SA-020-222022-05-05. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. Some customers may complain about the following symptoms occurring when driving without anything ahead (no metallic object reflects the radar wave such as a vehicle ahead, an oncoming vehicle, a road sign or a guard rail). *While using Mazda Radar Cruise Control (MRCC), the MRCC cancels by itself. NOTE: The customer may misinterpret MRCC cancellation as unintended braking. MRCC cancellation feels the same as the steering wheel cancel button being pressed or the brake pedal being tapped. *When MRCC is not in use, "Safety and Driver Support Systems Temporarily Disabled. Front Radar Obscured." message appears in the instrument cluster / "Remove dirt on the front radar sensor" message appears in the center display and related i-ACTIVSENSE functions stop working. This is caused by the front radar (under specific road conditions) detecting a false error as if the radar sensor is dirty, resulting in cancellation of the MRCC. (no metallic object reflects the radar wave such as a vehicle ahead, an oncoming vehicle, a road sign or a guard rail).
SA-019-222022-05-05. Service bulletin. ELECTRICAL SYSTEM. Mazda Connected Services Frequently Asked Questions (FAQ).
SA-018-222022-05-05. Service bulletin. ENGINE AND ENGINE COOLING. The WSM shows 3 possible crankshaft sprocket and timing chain combinations (Type A, B and C), but some vehicles have been produced with a combination of Type A timing chain with 2 yellow-colored links with a Type B crankshaft sprocket.
SA-017-222022-05-05. Service bulletin. ELECTRICAL SYSTEM. Some customers may complain about any of the following: Infotainment Center Display does not provide the Authorization Code during the MyMazda App Connected Vehicle enrollment. *Remote function(s) inoperative. *Engine Start / Stop **Door Lock / Unlock **Lights ON / OFF *MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ". Confirm the customer's phone and vehicle have good to strong reception during the concern as shown in the table below. *If the reception is weak, move the vehicle to a location where the reception is good to strong as shown in the table, then try to get the Authorization Code and/or operate the remote functions before proceeding to the Repair Procedure if there is still an issue. *If the reception is good to strong, proceed to the Repair Procedure.
SA-016-222022-05-05. Service bulletin. EQUIPMENT. There are currently 2 methods for cutting a new auxiliary key blank. A. Auxiliary Key Trace Cut Method B. Auxiliary Key Code Cut Method
SA-004-22a2022-05-05. Service bulletin. ELECTRICAL SYSTEM. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
SA-014-222022-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Accessory instructions can be found on OneMazda under Dealer Resources - Parts & Accessories.
SA-013-222022-04-06. Service bulletin. ENGINE. A new cylinder head assembly for service parts has been newly established for SKYACTIV-G 2.5 with cylinder deactivation when replacement is needed. Valves, valve springs, valve spring seats, and cotters (IN/EX) are included in the new assembly.
SA-012-222022-04-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; TIRES; EQUIPMENT ADAPTIVE/MOBILITY. Some customers may complain about the infotainment system and/or the MyMazda App showing incorrect tire pressures and/or tire pressure missing. This may be caused by: Incorrect calendar entry (month/day/year) after a battery disconnect *Infotainment system software update. *BCM TPMS unlearn during vehicle storage or transport. *Wheel/Tire change

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.