The Nissan 370Z officially concluded its production run following the 2020 model year, meaning there is no "new" 2024 370Z. However, for those researching this platform today in 2026, the 370Z remains defined by its 3.7-liter VQ37VHR V6 engine. This naturally aspirated powerplant produces between 332 and 350 horsepower, serving as the final naturally aspirated engine in the legendary Z-car lineage before the 2024 Nissan Z transitioned to twin-turbocharging.
The Disambiguation of the 2024 Nissan Z and the 370Z
To understand the engine landscape in 2024 and 2026, one must first distinguish between the Nissan 370Z (chassis code Z34) and its successor, the Nissan Z (chassis code RZ34). While enthusiasts often search for "2024 370Z" specifications, Nissan actually retired the 370Z nameplate after a twelve-year run.
The 370Z was powered exclusively by the VQ37VHR engine from its debut in 2009 until its discontinuation. In contrast, the 2024 Nissan Z—which many consumers mistakenly refer to as a 370Z—utilizes the VR30DDTT, a 3.0-liter twin-turbocharged V6. If you are looking at a Z-car manufactured in 2024, it does not have the VQ37VHR; it has the VR-series engine. However, the VQ37VHR remains the dominant engine for anyone purchasing a pre-owned 370Z, which continues to be a high-volume vehicle in the secondary sports car market.
The Engineering Heart: What is the VQ37VHR?
The VQ37VHR is part of Nissan's VQ engine family, which has been featured on "Ward's 10 Best Engines" list multiple times. The "37" denotes the 3.7-liter displacement, while "VHR" stands for Variable Valve Event and Lift (VVEL) and High Response (High Revolution).
This engine was a significant leap over the previous VQ35HR found in the late-model 350Z. By increasing the stroke and implementing the VVEL system, Nissan engineers were able to improve both power delivery and fuel efficiency, though the engine is primarily known for its linear power band and distinct exhaust note. Unlike modern turbocharged engines that rely on forced induction to create torque at low RPMs, the VQ37VHR is a "high-strung" engine that rewards drivers for exploring the upper reaches of the tachometer, with a redline of 7,500 RPM.
The Role of VVEL (Variable Valve Event and Lift)
The VVEL system is perhaps the most technically significant feature of the VQ37VHR. Unlike traditional engines that use a throttle butterfly to regulate air intake, VVEL allows the engine to control air intake directly at the intake valves.
By varying the valve lift and the timing simultaneously, the engine can respond almost instantaneously to driver input. At low loads, the lift is kept small to reduce friction and improve fuel economy. Under heavy acceleration, the lift increases to allow maximum airflow into the combustion chamber. This technology eliminated much of the pumping loss associated with traditional throttle bodies, contributing to the "High Response" part of the engine's name.
Technical Specifications: VQ37VHR vs. VR30DDTT
When comparing the engine found in the 370Z to the engine found in the 2024 Nissan Z, the differences in philosophy are stark. The 370Z relies on displacement and high-RPM airflow, while the 2024 model relies on boost pressure.
| Specification | 370Z (VQ37VHR) | 2024 Nissan Z (VR30DDTT) |
|---|---|---|
| Engine Type | Naturally Aspirated V6 | Twin-Turbocharged V6 |
| Displacement | 3.7 Liters (3,696 cc) | 3.0 Liters (2,997 cc) |
| Horsepower | 332–350 hp | 400–420 hp |
| Torque | 270–276 lb-ft | 350–384 lb-ft |
| Compression Ratio | 11.0:1 | 10.3:1 |
| Valvetrain | DOHC with VVEL | DOHC with E-VVT |
| Redline | 7,500 RPM | 6,800 RPM |
| Fuel System | Multi-point Fuel Injection | Direct Injection |
The VQ37VHR engine in the 370Z Nismo variant was tuned to 350 horsepower, achieved primarily through exhaust tuning and an ECU (Engine Control Unit) reflash. In 2026, these figures still hold up well against modern four-cylinder turbo sports cars, though they fall short of the torque-heavy performance of the 2024 Z.
Performance Characteristics and Driving Dynamics
The VQ37VHR is often described as a "visceral" engine. Because it lacks turbochargers, the connection between the throttle pedal and the engine's reaction is mechanical and immediate. Owners of the 370Z often cite the "climb" to the 7,500 RPM redline as the most rewarding aspect of the car.
However, there are trade-offs to this design. The VQ37VHR is known for higher levels of NVH (Noise, Vibration, and Harshness) compared to European competitors. At high RPMs, the engine can feel "buzzy" through the gear shifter and pedals. For enthusiasts, this is seen as "character," but for those looking for a refined grand tourer, the engine can feel somewhat unpolished.
In the context of 2026, the VQ37VHR is celebrated as one of the last "big" naturally aspirated V6 engines. As emissions regulations have forced manufacturers toward smaller, turbocharged engines, the 3.7-liter VQ stands as a testament to an era where displacement was the primary driver of performance.
Reliability and Common Issues in the VQ37VHR
As the 370Z fleet ages, certain patterns in reliability have emerged. For anyone looking at a used 370Z in 2026, understanding the VQ37VHR’s maintenance needs is critical.
The Gallery Gasket Issue
One of the most documented issues with the VQ37VHR, particularly in models produced before 2013, is the failure of the internal oil gallery gaskets. These gaskets were originally made of a paper-like material that could blow out over time, leading to a drop in oil pressure. If left unaddressed, low oil pressure can lead to catastrophic engine failure. Nissan eventually updated these to metal-backed gaskets in later production years (roughly mid-2013 onwards), making the late-model 370Zs much more desirable.
Steering Lock Failure
While not strictly an engine component, the Electronic Steering Column Lock (ESCL) on 2009–2011 models frequently failed, preventing the engine from starting. Most owners have either bypassed this or replaced the unit with a later revision, but it remains a "prerequisite" check for new owners.
Concentric Slave Cylinder (CSC)
For 370Zs equipped with a manual transmission, the CSC is a known weak point. It is located inside the transmission bellhousing, meaning that when it fails (leaking hydraulic fluid and causing the clutch pedal to drop to the floor), the entire transmission must be removed to fix it. Many enthusiasts replace this with an "Eliminator Kit" that moves the slave cylinder outside the housing.
Tuning and Aftermarket Support
The VQ37VHR has one of the most robust aftermarket ecosystems in the automotive world. Because the engine was produced for over a decade and used across both Nissan and Infiniti (G37, Q50, Q60) platforms, parts are plentiful and well-researched.
- Bolt-on Modifications: Common upgrades include "Long Tube" cold air intakes, larger throttle bodies, and high-flow catalytic converters. These modifications, when paired with a professional tune (such as EcuTek or Uprev), can push the VQ37VHR toward the 330–340 wheel horsepower mark.
- Forced Induction: For those who want to match or exceed the power of a 2024 Nissan Z, the VQ37VHR handles boost remarkably well. Both centrifugal supercharger kits and twin-turbo kits are widely available. With a stock internal "bottom end," the engine can reliably handle around 450–500 wheel horsepower, though this requires significant cooling upgrades.
- Oil Cooling: The VQ37VHR runs notoriously hot. From the factory, the 370Z lacked a dedicated oil cooler until later years, and even then, it was undersized for track use. Any owner intending to drive the car spiritedly in 2026 should consider a 19-row or 25-row external oil cooler as their first modification.
Maintenance Requirements for Longevity
To keep a VQ37VHR running deep into the 2020s and beyond, a strict maintenance schedule is required. Nissan’s "VHR" engines are sensitive to oil quality due to the VVEL system's reliance on hydraulic pressure.
- Oil Changes: Use a high-quality 5W-30 synthetic oil. Many owners prefer Ester oil, as originally recommended by Nissan, to quiet the VVEL "clicking" noise, though standard synthetics are generally sufficient. Changes should occur every 3,000 to 5,000 miles.
- Spark Plugs: The VQ37VHR uses iridium-tipped spark plugs with a long service life, typically requiring replacement every 105,000 miles. However, for modified engines, this interval should be shortened.
- Cooling System: Ensure the coolant is flushed every 5 years or 60,000 miles. The VQ series is sensitive to overheating, which can quickly warp the heads.
Comparative Value: Buying a VQ37VHR in 2026
In 2026, the 370Z occupies a unique niche. It is more affordable than the 2024+ Nissan Z and offers a more analog driving experience. While it lacks the Apple CarPlay, advanced safety suites, and torque of the 2024 model, the 370Z provides a mechanical connection that is increasingly rare.
Prices for used 370Zs have stabilized. Early high-mileage models can be found at entry-level prices, while 2015–2020 Nismo models command a premium as collector items. When purchasing, the presence of the VQ37VHR is the primary selling point—it is an engine that sounds better than its turbocharged successor and offers a linear power delivery that is ideal for amateur drifting and track days.
Frequently Asked Questions
Does the 2024 Nissan Z use the VQ37VHR engine?
No, the 2024 Nissan Z uses the VR30DDTT engine. The VQ37VHR was the engine for the previous generation 370Z, which stopped production in 2020. While the cars look similar in silhouette, the engines are entirely different architectures.
What is the difference between VQ37VHR and VQ35HR?
The VQ37VHR has a larger displacement (3.7L vs 3.5L) and features VVEL (Variable Valve Event and Lift). The older VQ35HR used traditional variable valve timing (CVTCS) but lacked the sophisticated lift control found in the 3.7L version. The VQ37VHR generally produces more power and has a slightly higher redline.
Is the VQ37VHR a reliable engine?
Yes, it is considered very reliable if properly maintained. The main concerns are the oil gallery gaskets on pre-2013 models and high oil temperatures during track use. Once these are addressed, many VQ37VHR engines easily surpass 150,000 to 200,000 miles without major internal issues.
Can you swap a VQ37VHR into a newer 2024 Z?
Technically, any engine swap is possible with enough fabrication, but it is highly impractical. The 2024 Z's electronics, mounting points, and transmission interface are designed for the VR30DDTT. Moving to a VQ37VHR would be considered a "downgrade" in power and technology for that specific chassis.
What does "VHR" actually stand for in the engine code?
VHR stands for Variable Valve Event and Lift (VVEL) and High Response. This designation highlights the engine's ability to adjust valve lift for better efficiency and its high-revving nature, which provides a fast throttle response.
Final Recommendation for Owners and Buyers
If you are looking for the raw, high-revving experience of a naturally aspirated V6, the 370Z and its VQ37VHR engine remain one of the best values in 2026. While the 2024 Nissan Z is faster and more technologically advanced, the 370Z offers a simpler, more durable platform for those who enjoy engine tuning and DIY maintenance.
For buyers, the recommendation is to seek out 2013 or newer models to avoid the gallery gasket issues. For current owners, prioritize oil cooling and high-quality synthetic fluids to preserve the VVEL system. The VQ37VHR is likely to go down in history as one of Nissan's greatest engines, marking the end of an era before the inevitable shift toward total electrification and hybridization.
