2012 Mazda 6

The 2012 Mazda 6 is a mid-size sedan known for its sporty handling and sleek design. Engine options include a 2.5-liter inline-4 producing 170 horsepower and 166 lb-ft of torque, and a 3.7-liter V6 generating 272 horsepower and 269 lb-ft of torque. Both engines were available with a 6-speed automatic transmission, while the 2.5L also offered a 6-speed manual. Owners generally appreciate the Mazda 6’s driving dynamics and fuel economy (especially with the 2.5L engine). Common dislikes include the somewhat cramped rear seating, road noise, and the quality of some interior materials.

Engine

2.5L Inline-4

• Excessive Oil Consumption
  • Description/Symptoms: Some owners have reported excessive oil consumption, requiring frequent top-offs between oil changes. Blue smoke from the exhaust can also be a symptom.
  • Solution: In some cases, replacing the piston rings can resolve the issue.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found
• Valve Cover Gasket Leaks
  • Description/Symptoms: Oil leaking from the valve cover gasket, potentially causing a burning smell.
  • Solution: Replacing the valve cover gasket.
  • Estimated Cost to Fix: $150 - $300
  • Recalls: None Found

3.7L V6

• No Issues Found

Transmission

6-Speed Automatic (Applies to both 2.5L and 3.7L engines)

• Harsh Shifting/Hesitation
  • Description/Symptoms: Some owners have reported harsh or erratic shifting, particularly between certain gears. Hesitation when accelerating may also occur.
  • Solution: In some cases, a software update or transmission fluid change can improve the shifting. More severe cases may require valve body replacement or a complete transmission rebuild/replacement.
  • Estimated Cost to Fix: $100 (fluid change) - $3,500+ (rebuild/replacement)
  • Recalls: None Found

Suspension

• No Issues Found

Electrical

• TPMS Sensor Failure
  • Description/Symptoms: Tire Pressure Monitoring System (TPMS) sensor malfunctions, resulting in inaccurate readings or a constant warning light.
  • Solution: Replacing the faulty TPMS sensor.
  • Estimated Cost to Fix: $50 - $150 per sensor
  • Recalls: None Found
• Power Window Motor Failure
  • Description/Symptoms: Power windows failing to operate, often due to a failed motor.
  • Solution: Replacing the power window motor.
  • Estimated Cost to Fix: $150 - $300
  • Recalls: None Found

Exterior

• Rusting (Primarily in areas with road salt)
  • Description/Symptoms: Rust forming on the undercarriage, wheel wells, and other exposed areas.
  • Solution: Rust repair, which can range from sanding and painting small areas to replacing entire body panels.
  • Estimated Cost to Fix: $100 - $2,000+ depending on severity
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening/closing properly, rattling, or leaking.
  • Solution: Cleaning the sunroof tracks, replacing the sunroof motor, or resealing the sunroof.
  • Estimated Cost to Fix: $50 - $500+
  • Recalls: None Found
• Navigation System Failure/Glitches (If Equipped)
  • Description/Symptoms: Navigation system freezing, displaying incorrect information, or failing to boot up.
  • Solution: Software update or replacement of the navigation unit.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Summary

The 2012 Mazda 6 has a mix of potential issues. Engine problems, like oil consumption, can be costly to address. Transmission issues, particularly with the automatic, are also a concern and range from inexpensive fixes to complete rebuilds. Electrical and interior issues, such as TPMS sensor failures and sunroof malfunctions, are generally less expensive to resolve. The potential for rust, especially in colder climates, is something to inspect carefully before purchasing. Overall, while the 2012 Mazda 6 is a fun-to-drive sedan, potential buyers should be aware of these common issues and have the car inspected by a trusted mechanic.