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CriticalCommonEngine

Nissan 370Z: VVEL Variable Valve Lift Actuator Failure

VVEL Variable Valve Lift Actuator Failure is a common engine fault on the Nissan 370Z on the 2009–2021 cars, and we rate it critical. Putting it right costs $2,000 to $5,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 15 documented faults on the Nissan 370Z.

Vehicle
Nissan 370Z
Engine
3.7L
Years
2009–2021
Fuel
petrol
System
Engine

This page covers the Nissan 370Z as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Nissan 370Z faults15 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Rocker / valve cover yet. We would rather show none than show a picture of a different part.

What goes wrong

The VQ37VHR engine uses Nissan's Variable Valve Event and Lift (VVEL) system on the intake camshafts. The VVEL actuator motor and its worm-gear drive mechanism are prone to wear and failure, particularly in high-mileage or irregularly maintained examples. Failure causes the engine to enter limp mode with severely reduced power, a rough lumpy idle, and a cluster of P1800-series fault codes. Actuator replacement requires removal of the cam cover and in severe cases major disassembly. Parts alone can exceed $1,500 NZD. This is the single most significant documented mechanical fault of the VQ37VHR platform.

What you would notice

  • Sudden severe loss of power — engine enters limp mode with very restricted revs
  • Rough lumpy idle as if misfiring, particularly at light throttle
  • Check engine light with P1800, P1802, P1804, or related VVEL fault codes
  • Hesitation and stumble when pulling away from rest under light throttle
  • VDC or traction control warning lights illuminating alongside the check engine light

How to check it

Where to look. VVEL actuator assembly on the intake camshaft of each cylinder bank, beneath the cam covers

  1. Scan for fault codes before test driving — P1800-series codes are diagnostic of VVEL failure.

  2. Test idle quality with the engine fully warm; a good VQ37VHR idles smoothly at approximately 650-750 RPM.

  3. Apply very light throttle from a standstill and feel for hesitation.

  4. Request service history with confirmed oil change intervals — dirty oil accelerates VVEL mechanism wear.

Parts involved: Rocker / valve cover.

What it costs to put right

$2,000 to $5,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

  • “Has the car ever entered limp mode or shown P1800-series fault codes?”
  • “Has the VVEL actuator or any variable valve timing component been replaced?”
  • “Can you provide service records confirming regular oil changes?”

Now check the Nissan 370Z you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Nissan 370Z buyer questions

Is vvel variable valve lift actuator failure serious on a Nissan 370Z?

We rate it critical and common on the Nissan 370Z. The VQ37VHR engine uses Nissan's Variable Valve Event and Lift (VVEL) system on the intake camshafts. The VVEL actuator motor and its worm-gear drive mechanism are prone to wear and failure, particularly in high-mileage or irregularly maintained examples. Failure causes the engine to enter limp mode with severely reduced power, a rough lumpy idle, and a cluster of P1800-series fault codes. Actuator replacement requires removal of the cam cover and in severe cases major disassembly. Parts alone can exceed $1,500 NZD. This is the single most significant documented mechanical fault of the VQ37VHR platform.

How much does it cost to fix on a Nissan 370Z?

$2,000 to $5,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Nissan 370Z years are affected?

Our research records this fault on the 2009–2021 Nissan 370Z. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Scan for fault codes before test driving — P1800-series codes are diagnostic of VVEL failure. Test idle quality with the engine fully warm; a good VQ37VHR idles smoothly at approximately 650-750 RPM. Apply very light throttle from a standstill and feel for hesitation. Request service history with confirmed oil change intervals — dirty oil accelerates VVEL mechanism wear. Look here: VVEL actuator assembly on the intake camshaft of each cylinder bank, beneath the cam covers