Infiniti QX60 L50

3.5L naturally aspirated V6 — smooth, cultured, with that signature VQ exhaust note Nissan tuned with Ferrari as a reference. Adequate power for an SUV this size. Plastic timing chain guides are the known Achilles heel from 130,000 km. Oil consumption through piston rings in early units worth monitoring. Camshaft sensors fail regularly — OEM parts only.

• !! Severe oil consumption from piston ring wear from 120,000 km

  Piston rings wear prematurely, leading to significant oil consumption. Dealers have replaced complete engines under warranty. Owners report up to 2 quarts of oil lost per 1,000 miles.

  Symptoms: Blue exhaust smoke under acceleration, significant oil level drop, oily exhaust smell
  2,500–6,000 $
  Ad piston rings VQ35DE QX60VQ35 3.5 piston ring set
• !! Plastic timing chain guides fracture from 160,000 km

  Plastic timing chain guide rails are too brittle by design and break from 130,000 km. Fragments fall into the oil and risk engine damage.

  Symptoms: Cold-start rattle disappearing after a few seconds, increasingly loud chain noise at high mileage
  800–2,500 $
  Ad timing chain guide VQ35timing chain guide 3.5L Infiniti plastic
• !! Con rod bearing wear from oil starvation from 120,000 km

  Sustained oil starvation from the piston ring issue can cause connecting rod bearing damage. Engine repair including cylinder head replacement costs around €4,000; a replacement engine is €2,500–3,000.

  Symptoms: Metallic clattering and knocking from engine, severe power loss, oil pressure warning
  2,500–6,000 $
  Ad Con rod bearing VQ35DECrankshaft bearing Nissan 350ZEngine bearing V6 3.5

+ 9 more engine weaknesses + vehicle weaknesses

Updated VQ35DE with direct injection — same power, dramatically increased sludge risk from the DI setup. Oil change intervals must be shortened to 5,000 miles maximum. Owners report complete engine failures from 45,000 miles despite regular service. Dealers frequently deny warranty claims on sludge-related failures.

• !! Engine sludge — failure from 45,000 to 90,000 miles from 60,000 km

  Direct injection V6 prone to severe oil sludge buildup even with regular oil changes. Engine replacement costs $13,000–18,000. Dealers deny warranty coverage citing maintenance issues. Oil changes every 5,000 miles are mandatory.

  Symptoms: Sudden power loss, low oil pressure warning, white exhaust smoke, thick black sludge visible on oil cap
  13,000–18,000 $
  Ad replacement engine VQ35DD QX60engine VQ35DD 3.5 direct injection long block
• !! Intake valve carbon buildup from direct injection from 80,000 km

  Direct injection does not wash intake valves — PCV oil mist deposits carbon. Noticeable power reduction from around 80,000 km. Walnut blasting cleaning recommended.

  Symptoms: Rough idle, misfires, power loss in upper rev range
  300–800 $
  Ad intake valve cleaning VQ35DDwalnut blast 3.5 DI QX60
• ! Valve cover gaskets leaking from 130,000 km

  Valve cover gaskets become leaky with mileage on the VQ35DD. Standard inexpensive repair.

  Symptoms: Oily smell, visible oil traces on valve covers, oil on spark plugs
  150–450 $
  Ad valve cover gasket VQ35DDvalve cover gasket QX60 2017 2018