Infiniti QX70 (S51) Factory Service Repair Manuals

The Infiniti QX70 (S51) 2013-2017 Factory Service Repair Manuals provide comprehensive technical guidance for maintaining and repairing the QX70 model. Covering engine diagnostics, electrical wiring diagrams, transmission details, DTC (diagnostic trouble codes), and troubleshooting guides, this manual is an essential resource for both professionals and enthusiasts. It offers step-by-step instructions, detailed illustrations, and specifications to ensure precise repair and maintenance across all vehicle systems, supporting optimal performance and reliability for the Infiniti QX70 from 2013 to 2017.

Symptom Diagnosis

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VQ37VHR, VK50VE Engines

2WD AWD, 7AT: RE7R01A (VQ37VHR)

• Suspension Components: Premature wear in suspension parts, particularly in front-end components, which can lead to clunking noises and uneven tire wear.
• Infotainment and Electronics: Occasional glitches with the infotainment system and issues with the navigation or audio, including slow responsiveness and freezing.
• Fuel Efficiency: Some drivers found fuel consumption to be higher than expected for the model, especially in urban driving.
• Transmission Performance: Reports of slight delays or rough shifting, especially in earlier production years, although not generally leading to critical issues.

To prevent or address these issues, regular maintenance and timely software updates, where applicable, are recommended.

• Suspension and Steering Components: Inspect bushings, control arms, and ball joints regularly, as these parts can experience early wear, especially in vehicles driven on rough roads. Look for uneven tire wear or unusual noises that could indicate suspension issues.

• Transmission Fluid and Software: Ensure the transmission fluid is replaced according to the recommended schedule, and consider updating the transmission control software if shifts seem rough or delayed. Proper transmission care can help avoid premature wear.

• Infotainment System: Check for the latest software updates for the infotainment system, as updates can address lag or freezing issues. Keeping software current improves responsiveness and system functionality.

• Cooling System: Inspect coolant levels and check for potential radiator or hose leaks, as the engine may run hot under heavy use. Regular cooling system maintenance helps prevent overheating and keeps the engine at optimal temperature.

• Engine Oil and Air Filters: Regular oil changes and air filter replacements are essential for the QX70's engine performance, especially under heavy driving conditions. Using high-quality oil and filters helps protect the engine from excessive wear.

• Brakes: Monitor brake pad wear and check for any vibrations or unusual noises, as these can indicate rotor or pad issues. Ensuring brake components are in good condition is crucial for safe operation.