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Service bulletins for the 2012 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.

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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
SA-041-262026-07-03. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This SA supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-061/25 12/17/25 DESCRIPTION If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices. Examples: 1. Devices connected to the DLC-2 (battery discharge/DTC stored) 2. Devices plugged into the 12V outlet 3. GPS tracking device (engine no start/battery discharge) 4. Dash cam (DTC stored) 5. Non-certified USB cable (Apple Carplay™/ Android Auto™ will not connect) 6. Over-sized wheels/tires (incorrect GPS location) 7. DTC C0023:14 8. Decorative trim and/or cover on the START/STOP ENGINE button Example 1: Some electrical devices connected to the DLC-2 connector by insurance or mobile phone companies may cause: Battery discharge. The device may disrupt the CAN system battery saver mode. • IDS/MMDS will not communicate with the vehicle due to poor DLC-2 connection. The aftermarket device may cause DLC-2 female terminals to spread open.
SA-029-262026-05-05. Service bulletin. UNKNOWN OR OTHER; ENGINE; POWER TRAIN; SERVICE BRAKES. This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers. SCHEDULED MAINTENANCE Refer to the applicable Workshop Manual or Owner's Manual for vehicle -specific manufacturer scheduled maintenance. Workshop Manual - Refer to section 00-00 SCHEDULED MAINTENANCE. Owner's Manual - Refer to section 8 Maintenance and Care. b. Note: Please refer to the information below outlining the services not included in Mazda's Factory Scheduled Maintenance: IMPORTANT: Recommending fluid flushes when not necessary can lead to customer confusion and dissatisfaction. Fluid flushing for preventive maintenance purposes is strongly discouraged, unless otherwise specified in a published procedure (Owner’s Manual, Workshop Manual, Technical Service Bulletin, etc.).
SA-057-242024-09-04. Service bulletin. ENGINE; ELECTRICAL SYSTEM; UNKNOWN OR OTHER. If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices.
SA-052-242024-09-04. Service bulletin. POWER TRAIN; ENGINE. Some customer's might state that they notice fluid or oil leaking/dripping on the ground when the vehicle is parked. For this concern, inspect the vehicle for any trace of a fluid or oil leak and use the following examples as a guide to determine if it is severe enough to require a repair, or just to clean the area and monitor it at the next service.
SA-011-242024-03-06. Service bulletin. STEERING; SERVICE BRAKES, HYDRAULIC; WHEELS; TIRES; ENGINE AND ENGINE COOLING; POWER TRAIN. Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers.
SA-032-23a2023-11-02. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices.
SA-032-232023-06-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices.
RF-23-012023-02-02. Service bulletin. ENGINE AND ENGINE COOLING. When servicing SKYACTIV engine vehicles requiring to replace the Oil Galley Plug and Crush Washer, order the required part numbers below. These parts are not listed in GEPC and were previously listed as "non-serviceable" in the cylinder block diagram.
MT-004-222023-01-05. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may experience the Check Engine Light ON with DTC P0171 (Fuel Trim too Lean) and possibly DTCs P030X (Misfire). Vehicles having this concern should use the following Inspection/Repair procedure.
05006152022-06-06. Service bulletin. POWER TRAIN; ENGINE. Vehicle speed does not increase with engine speed and ATX does not shift up or down
01023152022-06-06. Service bulletin. ENGINE; ELECTRICAL SYSTEM. Rough Idle with MIL on and DTC P0015/P0524
01014152022-06-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Engine Oil seepage from engine oil pressure switch
01002162022-06-06. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. PreMixed long life "FL22" Engine Coolant
01001162022-06-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Engine Start /Stop Procedure with room fuse removed
00-001-222022-03-04. Service bulletin. POWER TRAIN; SERVICE BRAKES, HYDRAULIC; ENGINE AND ENGINE COOLING; STEERING. Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers.
MT-003-212021-10-31. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION: OIL COOLER. Some customers may complain about high engine oil consumption. Before attempting any repairs, verify the complaint by using the guideline below to determine if an engine repair is necessary:
MT-002-212021-10-02. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. 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. What if a customer puts E85 in there Mazda vehicle? Symptoms include: Rough Running, Lean Codes, Misfires and/or misfire codes, Lack of power, Poor fuel economy, Spark knock, Mechanical engine damage.
01-006-21-3779a2021-09-03. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE AND ENGINE COOLING. This service bulletin provides testing and charging procedures in order to promote proper battery maintenance, to deliver new vehicles with fully charged batteries, and to reduce unnecessary battery replacement cost. For new vehicles in stock at the dealer, inspect and maintain the battery periodically according to the repair procedure.
MT-002-212021-06-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. When programming a key or installing a Genuine Mazda Accessory Remote Engine Start system, you may encounter programming difficulty. This may be caused by a customer installed aftermarket decorative trim and/or cover on the START/STOP ENGINE button. The aftermarket accessory may create electrical interference, which may interfere with programming.
MT-001-212021-06-01. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT. If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal Workshop Manual diagnosis. Aftermarket devices may be the cause of the electrical concern. Ask the customer if any aftermarket devices have been installed.
00-001-21-37682021-02-05. Service bulletin. STEERING; WHEELS; POWER TRAIN; ENGINE AND ENGINE COOLING. Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers.
01-009-16-31722021-01-28. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may experience a rough idle with the check engine light on and DTC P0015 / P0524 stored in memory. P0015:00 - Exhaust CMP timing over-retarded, P0524:00 - Engine oil pressure too low. This is caused by a drop in engine oil pressure due to a piece of foreign object stuck on the oil pump pressure relief valve or oil control valve (OCV). The temporary entry of the foreign object triggers a check engine light on, but rough idle will not be produced until a later time.
MT-005-202020-12-03. Service bulletin. ENGINE AND ENGINE COOLING. Some customers may complain about high engine oil consumption. Before attempting any repairs, verify the complaint by using the guideline below to determine if an engine repair is necessary: Engine Oil Consumption Inspection Guideline 1. Record the vehicle mileage. 2. Engine at normal operating temperature, top off engine oil level to the full mark on the dipstick. 3. Ask the customer to return to the dealer after 1200 miles to recheck the engine oil level. 4. After 1200 miles, engine at normal operating temperature, check the engine oil level on the dipstick. 5. Is the engine oil level above the low mark on the dipstick? • Yes - No repair is necessary. • No - Proceed to MGSS online or Workshop Manual (section 01-03 NO. 16 HIGH OIL CONSUMPTION/LEAKAGE).
SA-071-202020-11-04. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Currently, the instructions on MGSS recommend the use of Loctite 962T or equivalent when installing a SKYACTIV cylinder head, but it is no longer available. The following 3 adhesives are alternatives available as an equivalent to Loctite 962T: Loctite 272, Loctite 518 Threebond TB-1386H
01-011-20-37342020-09-01. Service bulletin. ENGINE AND ENGINE COOLING. Some customers may complain about an unusual noise coming from the engine compartment for about 20 seconds after a cold engine start. This noise is a normal engine operation for improved exhaust gas emissions. The noise does not indicate a malfunction. ACCELERATED WARM-UP SYSTEM (AWS): All SKYACTIV-G engines adopt AWS to reduce exhaust gas emissions immediately after a cold engine start. AWS increases the engine idling speed and retards the ignition timing for about 20 seconds after the cold engine start to quickly warm up the catalytic converter. The customer may identify the engine sound during the AWS operation as a unusual noise.

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