Infiniti QX50 (J50) Service and Repair Manuals

Infiniti QX50 (J50) Service and Repair Manuals provide comprehensive guidance for maintaining and repairing the vehicle. These manuals include detailed instructions on engine diagnostics, transmission, suspension, electrical systems, and troubleshooting error codes. They also feature wiring diagrams, sensor locations, and maintenance schedules, helping owners and technicians ensure the optimal performance and longevity of the Infiniti QX50 (J50).

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VQ37VHR Engine

7AT: RE7R01A Transmission

1. Suspension and steering

Problem: Wear of ball joints, stabilizer bushings and shock absorbers due to poor road conditions.

Prevention:

Regularly check the condition of the suspension.

Use quality spare parts for repairs.

Avoid aggressive driving on uneven roads.

2. Automatic transmission (AT)

Problem: Delays when shifting gears, vibrations during acceleration.

Prevention:

Monitor the level and condition of the transmission fluid.

Change the oil every 60,000–80,000 km.

3. Engine (VQ37VHR)

Problem: Increased oil consumption, overheating under high loads.

Prevention:

Regularly check the oil level and top up if necessary.

Use the recommended oil and change it in a timely manner.

Monitor the condition of the cooling system.

4. Electrics and sensors

Problem: Parking sensors, rear view camera and multimedia malfunction.

Prevention:

Check connectors and contacts for dirt or corrosion.

Regularly update the multimedia system software (if available).

5. Air conditioning system

Problem: Poor cooling efficiency due to refrigerant leaks or compressor wear.

Prevention:

Check the air conditioning system before the summer season.

Fix leaks and top up with refrigerant as needed.

6. Brake system

Problem: Rapid wear of brake pads and discs.

Prevention:

Use original or high-quality replacements.

Periodically check the condition of the brake hoses and fluid.

7. Exhaust system corrosion

Problem: Rust on connections and muffler.

Prevention:

Treat with anti-corrosion agents.

Regularly wash the underbody of the car, especially in winter.

8. Problems with the all-wheel drive (AWD) system

Problem: Uneven tire wear can lead to differential overload.

Prevention:

Maintain uniform pressure in all tires.

Change tires in a timely manner and monitor their condition.