2015 INFINITI Q60

Typical onset: 60,000-100,000 mi

Symptoms: Transmission fluid appears milky or strawberry-milkshake colored, Harsh shifting or slipping between gears, Engine overheating or transmission overheating warnings, White smoke from exhaust if coolant enters trans severely

Fix: Replace transmission oil cooler, flush both cooling system and transmission completely, sometimes requires full transmission replacement if contamination sat too long. 8-12 hours labor for cooler and flushes, 15-20 hours if transmission is cooked.

Estimated cost: $1,200-$2,800 for cooler/flushes; $4,500-$6,500 if trans needs replacement

Typical onset: 80,000-130,000 mi

Symptoms: Sudden knocking or rattling from lower engine at idle or acceleration, Metal shavings in oil during change, Low oil pressure warning even with correct oil level, Catastrophic failure: engine seizes or throws a rod

Fix: Oil gallery gaskets (upper and lower) fail internally, starving main and rod bearings. Requires full teardown—often short block replacement or complete engine rebuild with new bearings, gaskets, and machine work. 25-35 hours labor minimum.

Estimated cost: $6,000-$10,000 for short block or rebuild; $8,000-$12,000 for reman long block swap

Typical onset: 70,000-110,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Vibration at idle especially with A/C on, Excessive engine movement visible when revving in Park

Fix: Rubber mounts crack and separate, allowing drivetrain to shift excessively. Replace transmission mount and inspect engine mounts simultaneously. 1.5-2.5 hours labor.

Estimated cost: $250-$450

Typical onset: 90,000-140,000 mi

Symptoms: Rough idle, hesitation, or stumble during acceleration, Check engine light with lean fuel codes (P0171/P0174), Hard starting or extended cranking especially when hot, Loss of power under load

Fix: Direct-injection system sensitive to fuel quality—filter clogs or high-pressure pump fails. Replace in-tank fuel filter (often neglected), high-pressure pump if failing. Tank drop required. 3-5 hours labor for filter, 4-6 for pump.

Estimated cost: $400-$700 for filter service; $1,200-$1,800 for high-pressure pump replacement

Typical onset: 100,000-150,000 mi

Symptoms: Rattling from front of engine on cold start that disappears after warmup, Check engine light with variable valve timing codes, Rough running or misfires if chain jumps timing

Fix: VQ37 timing components wear with age—guides crack, tensioners weaken. Requires front cover removal, replacement of chains, guides, tensioners, and front seals. 12-16 hours labor.

Estimated cost: $2,200-$3,500

Typical onset: 80,000-120,000 mi

Symptoms: Harsh or delayed shifts especially 2-3 or 3-4, Transmission stays in limp mode (3rd gear only), Check engine light with transmission solenoid codes, Flaring or slipping between gears

Fix: Solenoids and valve body wear internally; sometimes fixed with solenoid replacement, often requires valve body rebuild or replacement. Trans must be dropped or partially disassembled. 6-10 hours labor.

Estimated cost: $1,400-$2,800