2018 INFINITI QX60

Typical onset: 60,000-120,000 mi

Symptoms: Shuddering or juddering during acceleration, especially 15-40 mph, Whining or grinding noise from transmission, Hesitation when accelerating from stop, Transmission overheating warnings, Complete loss of forward gears or limp mode

Fix: CVT replacement or rebuild required. Nissan extended warranty to 84k mi on some units, but many fail just outside coverage. Remanufactured unit swap takes 8-12 hours; rebuild adds time but may include updated valve body and belt. Transmission oil cooler should be replaced simultaneously as contamination is common.

Estimated cost: $4,500-7,500

Typical onset: 50,000-90,000 mi

Symptoms: CVT fluid mixing with coolant (strawberry milkshake in reservoir), Transmission running hot, Coolant loss with no visible external leak, CVT shuddering that worsens progressively

Fix: Replace transmission oil cooler and flush both cooling system and CVT completely. If cross-contamination occurred, CVT damage is likely and full transmission service or replacement needed. Cooler replacement alone is 3-4 hours, but contamination cleanup adds significant time and often requires new CVT.

Estimated cost: $800-1,200 (cooler alone), $5,000-8,000 (with CVT replacement if contaminated)

Typical onset: 80,000-140,000 mi

Symptoms: Rattling noise on cold start that fades after warm-up, Check engine light with P0011/P0021 (cam timing codes), Rough idle or misfires, Grinding or slapping noise from timing cover area

Fix: Timing chain, guides, tensioners, and VVT solenoids replacement. Front of engine teardown required. Critical to catch early—stretched chain can jump time and cause valve-to-piston contact requiring head work or full rebuild. Job takes 12-16 hours due to transverse V6 packaging and accessory removal.

Estimated cost: $2,800-4,500

Typical onset: 70,000-110,000 mi

Symptoms: Burning 1+ quart of oil every 1,000-2,000 miles, Blue smoke from exhaust on acceleration, Fouled spark plugs, Low oil pressure warnings if neglected

Fix: Piston ring wear is common on higher-mileage VQ35 engines. Rings can be replaced with pistons in-chassis (16-20 hours), but cylinders often show scoring requiring full short block replacement or engine rebuild (25-35 hours). Many shops recommend used/remanufactured engine swap as more cost-effective.

Estimated cost: $4,000-6,500 (ring job), $6,500-10,000 (short block/rebuild)

Typical onset: 60,000-100,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive vibration at idle, Engine rocking visible under hood during acceleration, Knocking over bumps

Fix: Hydraulic mounts fail and leak fluid. Transmission mount is frequent culprit and easier (2-3 hours). Front engine mount requires more disassembly (4-5 hours). Replace all three motor mounts if one has failed—others are usually worn. Aftermarket units adequate but OEM lasts longer.

Estimated cost: $600-900 (trans mount), $1,200-1,800 (all three mounts)

Typical onset: 80,000-120,000 mi

Symptoms: Hard starting, especially when fuel tank below 1/4, Sputtering or hesitation under load, Intermittent stalling, Check engine light with lean codes (P0171/P0174)

Fix: In-tank fuel pump module includes non-serviceable filter that clogs over time. Entire assembly replacement required. Tank must be dropped (3-4 hours). Use OEM or quality aftermarket—cheap pumps fail quickly. Often misdiagnosed as CVT issue when hesitation occurs.

Estimated cost: $700-1,100