Models Covered

• 2012 Infiniti M Series
  • M35
  • M37
  • M45
  • M56
  • Y51 Series

Features

• Detailed Wiring Diagrams: Complete schematics for electrical and electronic systems.
• Dealer-Level Accuracy: Manufacturer-approved procedures for precise repairs.
• Step-By-Step Guidance: Detailed instructions for troubleshooting, repair, and maintenance.
• PDF Format: Convenient for digital access and easy navigation.

Why Use This Manual?

• Professional Resource: Used by Infiniti dealership technicians for accurate repairs.
• Complete Coverage: Covers every aspect of vehicle repair and maintenance.
• Ease of Use: Perfect for professional mechanics and DIY enthusiasts alike.

Who Is This Manual For?

• Infiniti Owners: Empower yourself with the knowledge to maintain your vehicle.
• Professional Technicians: Access detailed dealer-level repair information.
• DIY Enthusiasts: Clear and straightforward instructions for at-home repairs.

Download Now

Get your 2012 Infiniti M Series OEM Workshop Repair Manual today and ensure your Infiniti performs at its best! Keep your car running smoothly with this comprehensive and reliable manual. 🚗

CONTENTS: 2012 Infiniti M Series Repair Manual (M35, M37, M45 & M56)

SAMPLE PAGES

Common Issues Reported By Owners

The 2012 Infiniti M Series, which includes the M37, M56, and the M35h hybrid, is a luxury sedan known for its strong performance, luxurious interior, and advanced features. However, like any vehicle, it has some common issues reported by owners. Here’s a detailed look at potential problems:

Common Issues with the 2012 Infiniti M Series

1. Excessive Oil Consumption (M56 with V8 Engine)

• Issue: The 5.6L V8 engine in the M56 is prone to consuming oil at higher-than-expected rates.
• Symptoms: Frequent need to top off oil, oil warning light, or low oil levels between oil changes.
• Solution: Regularly monitor and top off oil levels. Persistent issues may require replacing piston rings or valve seals.

2. Transmission Problems

• Issue: The 7-speed automatic transmission may experience rough or delayed shifting, particularly in higher-mileage vehicles.
• Symptoms: Jerky gear changes, hesitation when accelerating, or slipping between gears.
• Solution: Perform a transmission fluid flush and software update. In severe cases, a transmission rebuild or replacement may be required.

3. Suspension and Steering Concerns

• Issue: Suspension components, such as control arms, bushings, and struts, are prone to wear, leading to noises or handling issues.
• Symptoms: Clunking or squeaking noises over bumps, uneven tire wear, or loose steering feel.
• Solution: Replace worn suspension parts and ensure proper alignment for improved ride quality and handling.

4. Brake Rotor and Pad Wear

• Issue: The M Series may experience faster-than-average wear of brake pads and rotors, particularly with aggressive driving.
• Symptoms: Squealing or grinding noises during braking, vibration, or reduced braking performance.
• Solution: Replace brake pads and rotors as needed, using high-quality components.

5. Infotainment System Malfunctions

• Issue: Problems with the infotainment system, including unresponsive controls, freezing screens, and issues with Bluetooth or navigation.
• Symptoms: Unresponsive touchscreen, inability to connect devices, or loss of navigation functionality.
• Solution: Update the infotainment software or replace faulty system components.

6. Fuel System Issues (M35h Hybrid)

• Issue: Hybrid models may experience fuel system problems, including difficulty starting or reduced hybrid system performance.
• Symptoms: Engine hesitation, warning lights for the hybrid system, or decreased fuel economy.
• Solution: Inspect and repair or replace components such as the fuel pump, sensors, or hybrid battery system.

7. Interior Material Wear

• Issue: Premature wear of leather seats, steering wheel, and trim pieces is a common complaint, especially in vehicles exposed to harsh conditions.
• Symptoms: Cracking, peeling, or fading of interior materials.
• Solution: Regularly condition leather surfaces and protect them from sun exposure. Damaged materials may require repair or replacement.

8. Cooling System Leaks

• Issue: The radiator, hoses, and water pump are prone to developing leaks, leading to overheating if not addressed.
• Symptoms: Low coolant levels, visible leaks, or engine overheating.
• Solution: Inspect and replace faulty cooling system components. Perform regular coolant flushes to maintain system integrity.

9. Headlight Moisture or Fogging

• Issue: Moisture can accumulate in the headlight assemblies, affecting visibility and bulb longevity.
• Symptoms: Foggy or dim headlights or water droplets visible inside the housing.
• Solution: Reseal or replace headlight assemblies. Minor fogging may be resolved with silica gel packs.

10. Hybrid Battery Degradation (M35h Hybrid)

• Issue: Hybrid models may experience reduced battery performance or capacity over time.
• Symptoms: Decreased hybrid assist, warning lights, or reduced fuel economy.
• Solution: Inspect and replace the hybrid battery pack if necessary. Infiniti offers battery warranties for hybrid systems, so check for coverage.

Maintenance Tips for the 2012 Infiniti M Series

1. Oil Changes: Use high-quality synthetic oil and follow the manufacturer-recommended intervals.
2. Transmission Service: Regularly flush and refill the transmission fluid to avoid shifting issues.
3. Tire Care: Rotate tires regularly and maintain proper alignment to prevent uneven wear.
4. Brake Inspections: Check pads and rotors periodically to ensure optimal performance.
5. Cooling System Maintenance: Flush the coolant every 30,000–50,000 miles or as recommended in the owner’s manual.
6. Software Updates: Keep the infotainment and hybrid system software up to date.

Summary

The 2012 Infiniti M Series offers a luxurious and sporty driving experience, with models tailored to different needs—whether you prefer the V6 (M37), the powerful V8 (M56), or the fuel-efficient hybrid (M35h). While it is generally reliable, the vehicle does have some known issues, such as oil consumption in the V8, transmission concerns, and suspension wear. Regular maintenance and addressing problems early can help keep your Infiniti M running smoothly.

If you’re considering purchasing a used model, a pre-purchase inspection and review of the service history are highly recommended.

It is the same manual that your local Infiniti dealer mechanics use to diagnose and repair your car.

CONTENTS: 2011 Infiniti M37 and M56 Repair Manual

SAMPLE PAGES