The Infiniti QX80 is a luxury full-size SUV competing with rivals like the Lexus LX, Cadillac Escalade, and Mercedes-Benz GLS. To maximize its lifespan and protect your investment, understanding common issues and maintenance requirements is essential.

Common Issues (2014-2020 Models):

Engine and Timing Chain:

• Timing chain failures requiring $4,000+ repairs
• Stretched chains needing replacement

Fuel System:

• Fuel leaks
• Strong gasoline odors while parked
• Faulty fuel pressure sensors

Electrical System:

• Battery drain issues
• Dashboard lighting failures
• Instrument cluster problems

Braking and Collision Systems:

• Unintended automatic emergency braking activation
• Caliper issues

Essential Maintenance Schedule:

Oil Changes:

• Every 7,500 miles (normal conditions)
• Every 5,000 miles (severe conditions)
• Use manufacturer-specified synthetic oil

Tire Care:

• Rotation every 5,000-7,500 miles
• Monthly pressure checks
• Regular tread wear inspection

Fluid Services:

• Transmission fluid: Inspect every 60,000 miles
• Coolant: Replace every 30,000 miles
• Brake fluid: Replace every 30,000 miles
• Power steering fluid: Check during oil changes

Warning Signs to Watch:

Engine:

• Rough idling
• Check engine light
• Unusual noises
• Excessive exhaust smoke

Electrical:

• Intermittent dashboard warnings
• Slow starter operation
• Battery drainage
• Random electrical glitches

Suspension:

• Knocking sounds
• Uneven tire wear
• Excessive body roll
• Vehicle pulling to one side

Potential Repair Costs:

• Battery Cable Replacement: $1,576–$1,607
• Sunroof Motor Replacement: $1,178–$1,229
• Exhaust Manifold Replacement: $2,644–$2,813
• Backup Warning System Sensor: $1,999–$2,017

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