2012 Mazda 6 Service and Repair Manual

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Covers all 2012 6 trims — i Sedan 4-Door, GS Sedan 4-Door, GT Sedan 4-Door +1 more ·
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2012 Mazda 6 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • i Sedan 4-Door
  • GS Sedan 4-Door
  • GT Sedan 4-Door
  • S Sedan 4-Door

Engines covered

  • 2.5L 2488CC 152Cu. In. l4 GAS DOHC Naturally Aspirated
  • 3.7L 3726CC 227Cu. In. V6 GAS DOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams
NHTSA #18V71700012/10/2018Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULEDo not park indoors

Mazda North American Operations (Mazda) is recalling certain 2014-2015 Mazda CX-9 vehicles sold, or ever registered in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands or "Zone A." Additionally, unless covered in "Zone A," Mazda is recalling certain 2011-2013 Mazda6, 2011-2012 CX-7, and 2011-2015 CX-9 sold, or ever registered in the states of Arizona, Arkansas, Delaware, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, West Virginia and the District of Columbia, or "Zone B." Additionally, unless covered in Zone A or Zone B, Mazda is recalling certain 2010-2013 Mazda6, 2010-2012 CX-7, and 2010-2015 CX-9 vehicles ever registered in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming or "Zone C." These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.

Consequence

An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.

Remedy

Mazda will notify owners, and dealers will replace the front passenger air bag inflator with an alternate inflator, free of charge. The recall began November 9, 2018. Owners may contact Mazda customer service at 1-800-222-5500, Option 4. Mazda's number for this recall is 1317F.

NHTSA #19V78200031/10/2019Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULEDo not park indoors

Mazda North American Operations (Mazda) is recalling certain 2007-2012 CX-7, CX-9, and 2009-2012 Maza6 vehicles. These vehicles had their passenger frontal air bag inflators previously replaced under a prior recall using inflators of the same design. The inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.

Consequence

An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.

Remedy

Owners are advised not to drive their vehicles until the repair has been performed. Mazda will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. The recall began December 3, 2019. Owners may contact Mazda customer service at 1-800-222-5500, option 4. Mazda's number for this recall is 1317F. Note: This recall supersedes recalls 16V356 and 17V012.

NHTSA #19V32300025/04/2019Component: STRUCTURE

Mazda North American Operations (Mazda) is recalling certain 2011-2013 Mazda6 vehicles sold, or ever registered in Connecticut, Delaware, the District of Columbia, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland,Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, and Wisconsin. The front cross member may corrode after exposure to road salt.

Consequence

Corrosion may weaken the mounting point for the passenger side lower control arm, unexpectedly changing the steering alignment and increasing the risk of a crash.

Remedy

Mazda will notify owners, and dealers will inspect the cross member and either install a side member and drain hose and apply wax to protect from rust, or install a drain hose and an improved front cross member, free of charge. The recall began June 13, 2019. Owners may contact Mazda customer service at 1-800-222-5500 Option 4. Mazda's number for this recall is 2818I. Note: This recall is an expansion of Recall 18V-631.

NHTSA #17V45700018/07/2017Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULEDo not park indoors

Mazda North America Operations (Mazda) is recalling certain 2012 CX-7, CX-9 and Mazda6 vehicles sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands, or "Zone A." Additionally, unless included in "Zone A" above, Mazda is recalling certain 2009 CX-7, CX-9 and Mazda6 vehicles sold, or ever registered in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia, or "Zone B." Additionally, unless included in "Zone A" or "Zone B" above, Mazda is recalling certain 2007-2008 CX-7 and CX-9 sold, or ever registered in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming. These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may rupture due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.

Consequence

An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.

Remedy

Owners are advised not to drive their vehicles until the remedy is performed. Mazda will notify owners, and dealers will replace the front passenger side air bag inflator with an alternate inflator, free of charge. The recall began October 4, 2017. Owners may contact Mazda customer service at 1-800-222-5500. Mazda's number for this recall is 1317F. Note: This recall supersedes recall 17V-012.

NHTSA #14V11400011/03/2014Component: FUEL SYSTEM, GASOLINE

Mazda North America Operations (Mazda) is recalling certain model year 2010-2012 Mazda6 vehicles manufactured September 14, 2009, through May 2, 2011, and equipped with 2.5L engine. In the affected vehicles, spiders may weave a web in the evaporative canister vent hose, blocking it and causing the fuel tank to have an excessive amount of negative pressure.

Consequence

Negative pressure could cause the fuel tank to crack resulting in a fuel leak, increasing the risk of a fire.

Remedy

Mazda will notify owners, and dealers will reprogram the powertrain control module and inspect and clean the canister vent line. If a web was found in the line, the fuel tank and check valve on canister vent line will be replaced. These repairs will be done free of charge. The recall began on April 30, 2014. Owners may contact Mazda at 1-800-222-5500. Mazda's recall number associated with this campaign is 7214C.

NHTSA #13V42500024/09/2013Component: LATCHES/LOCKS/LINKAGES:DOORS:LATCH

Mazda is recalling certain model year 2009-2013 Mazda6 vehicles manufactured February 4, 2008, through August 24, 2012. The door latch mounting screws may become loose.

Consequence

If all three door latch mounting screws become excessively loose the door latch mechanism would not engage and the door might open while the vehicle is in motion increasing the risk of accident or injury.

Remedy

Mazda will notify owners, and dealers will apply a thread locking adhesive to the door screws and retorque them, free of charge. The recall began on October 29, 2013. Owners may contact Mazda at 1-800-222-5500. Mazda's recall number is 7013I.

TSB #11032103

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 ma

TSB #11026917

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. Aftermarke

TSB #11026904

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

TSB #11022742

Some vehicles may experience exterior trim heat damage such (melted, separating, etc.) when parked near a glass building or Low-E windows. This may be caused by the sun's reflection. If a structure's windows create enough of a curve, the co

TSB #11022727

When replacing the SiriusXM satellite radio unit, a call must be made to inform SiriusXM of the existing Radio ID and the new/replacement SAT Radio ID as soon as possible to ensure the customer leaves the dealership with an active SAT radio

TSB #11020039

Some customers may complain about a noisy HVAC blower motor or odor after a cabin air filter replacement. Foreign debris on the blower motor after servicing the cabin air filter may be the cause. During the removal of the cabin air filter,

TSB #11017699

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

TSB #11007022

Some vehicles may experience exterior trim heat damage such (melted, separating, etc.) when parked near a glass building or Low-E windows. This may be caused by the sun's reflection.

Showing the 8 most recent of 169 technical service bulletins on file with NHTSA.

04/26/20Component: AIR BAGSCrash reported2 injured

TL* THE CONTACT OWNED A 2012 MAZDA 6. WHILE DRIVING APPROXIMATELY 30 MPH AND ATTEMPTING TO AVOID A COLLISION, THE DRIVER LOST CONTROL OF THE VEHICLE AND CRASHED INTO A TREE. THE FRONT END OF THE VEHICLE WAS SEVERELY DAMAGED, BUT THE AIR BAGS DID NOT DEPLOY. THE VEHICLE WAS DESTROYED AND TOWED TO AN UNDISCLOSED LOCATION. THE CAUSE OF THE FAILURE WAS NOT DETERMINED. THE MANUFACTURER AND LOCAL DEALER (RENT TO OWN OUTLET, 1027 WESTBANK EXPY, GRETNA, LA 70053) WERE NOTIFIED OF THE FAILURE. THE DRIVER SUSTAINED AN INJURED LEFT SHOULDER AND THE FRONT PASSENGER SUSTAINED FACIAL AND ORAL INJURIES. MEDI

04/23/20Component: AIR BAGSCrash reported2 injured

ON APRIL 20 MY SELF AND MY 14 YEAR OLD DAUGHTER WAS IN A REALLY BAD ACCIDENT AND NEITHER ONE OF OUR AIRBAG DID!!!! NOT COME OUT AND MY MYSELF ND MY CHILD WAS HURT I WAS RUSH TO THE HOSPITAL AND I'VE BROUGHT MY MY CAR IN DECEMBER OF 2017. AND IT HAPPEN ON CITY STREETS

12/10/20Component: AIR BAGSCrash reported1 injured

TL* THE CONTACT OWNED A 2012 MAZDA MAZDA6. WHILE DRIVING 35 MPH, ANOTHER VEHICLE CRASHED INTO THE FRONT OF THE CONTACT'S VEHICLE. THE AIR BAGS DID NOT DEPLOY. A POLICE REPORT WAS FILED. THE CONTACT SUSTAINED INJURIES TO THE BACK, LEGS, HIP, AND NECK THAT REQUIRED MEDICAL ATTENTION. THE VEHICLE WAS TOWED TO A COLLISION CENTER WHERE THE VEHICLE WAS DEEMED DESTROYED. THE VEHICLE WAS NOT TAKEN TO A DEALER OR INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING OR REPAIRS. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 100,000.

08/15/20Component: AIR BAGS,STRUCTURECrash reported1 injured

ON JULY 18, 2018 I WAS IN FRONTAL IMPACT ACCIDENT. WHILE DRIVING ON A CITY STREET. I WAS ALONE AND DRIVING I DID NOT HAVE A PHONE IN MY POSSESSION OR IN THE CAR AT THAT TIME. THE VEHICLE THAT HIT ME WAS TRAVELING AT LEAST 40 MILES AN HOUR. THE UPPER AND SIDE AIRBAGS DID NOT DEFLATE, THE FRONT AIRBAG DEFLATED SIDEWAYS AND MISSED MY FACE COMPLETELY. MY TORSO HIT THE STEERING WHEEL AND MY STERNUM WAS FRACTURED. MY RIGHT ANKLE WAS BRUISED, SCRAPED AND SPRAINED. BECAUSE OF THE SEVERE PAIN I WAS IN, I WAS NOT ABLE TO GET OUT OF THE VEHICLE ON MY OWN. I CARRIED OUT OF THE VEHICLE AND LAID ON T

12/06/20Component: ELECTRICAL SYSTEM,EXTERIOR LIGHTINGFire reported

TL* THE CONTACT OWNS A 2012 MAZDA 6. THE CONTACT STATED THAT THERE WAS AN INTERNAL ELECTRICAL FAILURE THAT CAUSED THE HEADLIGHTS TO BURN OUT. THE CONTACT REPLACED THE HEADLIGHT SOCKETS TWICE ON EACH SIDE AND NOTICED THAT THE AREA WAS MELTING AROUND THE FRONT HEAD LAMP ASSEMBLY SOCKETS. RUSS DARROW MAZDA OF MADISON (5234 HIGH CROSSING BLVD, MADISON, WI 53718, (877) 369-8081) WAS CONTACTED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND ADVISED THE CONTACT TO HAVE A DEALER REPAIR THE VEHICLE. THE APPROXIMATE FAILURE MILEAGE WAS 120,000.

02/08/20Component: FUEL/PROPULSION SYSTEMFire reported

TL* THE CONTACT OWNED A 2012 MAZDA 6. WHILE DRIVING 50 MPH, THE VEHICLE CAUGHT FIRE. THE FIRE DEPARTMENT EXTINGUISHED THE FIRE. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC. THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 14V114000 (FUEL SYSTEM, GASOLINE). THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 140,000. THE VEHICLE WAS DESTROYED.

04/11/20Component: SERVICE BRAKES,ENGINECrash reported

TL* THE CONTACT OWNS A 2012 MAZDA MAZDA6. THE CONTACT STATED THAT WHILE UNOCCUPIED, THE VEHICLE ROLLED AWAY AND CRASHED INTO A WALL WHILE THE EMERGENCY BRAKE WAS ENGAGED. THE CONTACT ALSO STATED THAT THE CHECK ENGINE LIGHT ILLUMINATED AND THE VEHICLE HAD DIFFICULTY STARTING. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE FAILURE COULD NOT BE REPLICATED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS NOT AVAILABLE.

01/19/20Component: UNKNOWN OR OTHER

Passenger dash has cracked some and dash is very very sticky..why has this happened..I feel if airbag had to deploy it would not because of this situation

Showing the 8 most serious of 99 complaints filed with NHTSA.

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