Nissan 370Z Z34

3.7L V6 with VVEL (Variable Valve Event and Lift) — continuously variable valve lift control instead of conventional cam phasing. 331 hp at 7,000 rpm, 363 Nm available early, 7,500 rpm redline. VVEL actuators are sensitive: never disassemble individually, otherwise P1090/P1092 and limp mode up to 3,500 rpm will follow. More robust than the VQ35HR — but the CSC clutch slave cylinder on manual variants remains a known fault.

• !! Oil gallery gaskets fail (P0011/P0021) from 80,000 km

  The paper oil gallery gaskets in the VQ37VHR become porous and allow oil to enter the timing chain housing. The system responds with limp mode and fault codes P0011/P0021. Nissan retrofitted improved metal gaskets.

  Symptoms: Engine enters limp mode (max. 3,000 rpm), fault codes P0011/P0021, occasional stumble at idle without further warning
  400–900 $
  Ad Oil gallery gasket VQ37VHR 13533-JK21A13533-JK21B Nissan 370ZTiming chain cover seal VQ37
• !! Bearing wear at high mileage from 150,000 km

  At high mileages and with spirited use, wear can occur on connecting rod and main bearings. The V6 does not tolerate running with a low oil level, which can be caused by the sealing issues.

  Symptoms: Metallic knocking on load changes, oil pressure warning, rough engine running at high revs
  2,000–5,000 $
  Ad Con rod bearing VQ37VHRCrankshaft bearing Nissan 370Z V6 3.7
• !! Clutch slave cylinder (CSC) fails prematurely from 50,000 km

  The internal concentric slave cylinder (CSC) of the FS6R31A gearbox is a known design defect. The thin aluminium housing is attacked by brake fluid and develops cracks — often under 50,000 km. Subject of a US class action lawsuit.

  Symptoms: Clutch pedal drops to the floor without warning, car cannot be put into gear, clutch fluid dripping from gearbox
  800–2,000 $
  Ad CSC clutch slave cylinder 370Z Z34Concentric slave cylinder VQ37VHRClutch master cylinder 370Z

+ 10 more engine weaknesses + vehicle weaknesses