Are 370Z engines reliable? Practical guide for buyers

Quick answer: short verdict on 370Z engine reliability

The VQ37VHR V6 that powers the Nissan 370Z is generally regarded as durable for a performance oriented engine, but owners and long term tests report recurring wear items that are worth checking on any used car, especially higher mileage examples MotorTrend long term test.

Bottom line, the engine is not a systemic catastrophic risk in public datasets, yet specific service items tend to recur and are detectable with targeted checks.

One paragraph quick conclusion

Short answer, the VQ37VHR can hold up well when regularly maintained, but ignition coils, valve cover seepage, and occasional oil consumption are the items most commonly reported in owner records and long term reviews CarComplaints overview.

What this article will cover

This article explains the engine basics, what official records and owner reports show, the most common engine issues on used 370Zs, a step by step pre purchase checklist, the diagnostics that matter, and how to budget for likely maintenance.

Engine basics: what the VQ37VHR is and why it matters

The VQ37VHR is Nissan's high displacement, high output V6 used in the 370Z, tuned for performance within the model's powertrain layout. It uses design choices that prioritize power and responsiveness, which changes how components wear compared with a commuter four cylinder Car and Driver review.

Because the VQ37VHR delivers higher peak power and revs compared with typical commuter engines, items such as ignition components, valve covers and gaskets, and oil control systems tend to experience greater thermal and mechanical stress over time. That makes oil condition and service interval history more important for this engine than for lower output powertrains.

What official records and owner reports show about problems and recalls

National records list complaints and recalls for the 370Z model line, though most formal recalls recorded through 2024 to 2026 relate to non engine safety items rather than a systemic engine design defect; check the model page for the specific model year and VIN NHTSA vehicle page and related recall summaries RepairPal recall.

Aggregated owner complaint sites and long term tests collect recurring service and maintenance items which tend to include ignition coil failures, oil leaks around valve cover areas, and reports of elevated oil consumption on some examples CarComplaints overview.

Long term publication tests also document practical maintenance notes and point to targeted inspections buyers should request during a pre purchase evaluation MotorTrend long term test.

Most common engine related issues on used 370Zs

Ignition coils, spark plugs and misfire symptoms

Ignition coil and spark plug wear shows up as rough idle, intermittent misfire codes, or loss of smooth power delivery; owners report coils as one of the more frequent service replacements on older 370Zs CarComplaints overview.

On a test drive, intermittent misfire will often be accompanied by a check engine light and inconsistent acceleration; a compression or leak down test is a useful follow up if misfire codes appear.

Valve cover and accessory oil leaks

Valve cover gasket seepage is repeatedly reported in service histories and owner threads, often showing as oil on the top of the engine near the cam cover and on surrounding accessories; look for external oil staining and wet gaskets during inspection MotorTrend long term test.

Small leaks can be manageable when repaired early, but persistent seepage left unchecked increases the chance of accessory drive contamination and can mask other issues during an inspection.

Elevated oil consumption reports

There are documented instances of elevated oil consumption on some 370Z engines in owner reports and long term stove‑tests, yet public datasets do not show a conclusive, model wide epidemic of catastrophic engine failure; verify oil records when possible Car and Driver review. See Nissan TSB details VQ37HR TSB.

When oil consumption is present without clear service history, expect to request measurements or a compression/leak down test as part of a pre purchase inspection.

Pre purchase checklist: specific checks to run on a used 370Z

Quick checks you can do at the listing and curbside

At the listing and before contacting a dealer, ask for recent oil level readings and service records that show oil changes at regular intervals. If the seller cannot provide records, treat that as a risk signal.

Visually inspect the valve cover area and the intake for signs of oil seepage, look under the car for drips, and note any oily residue around ignition coil boots. Also confirm odometer consistency across documents.

Mechanic level checks to request before purchase

Ask a mechanic to perform a compression test or leak down test, inspect ignition coils and spark plugs, and specifically check the valve cover gaskets and accessory seals. These checks target the most reported engine maintenance items for the platform Car and Driver review.

Request that the shop log oil level and consumption measurements if the test drive demonstrates quick oil loss, and ask for records of any recent coil or gasket work to see whether recurring repairs were performed properly.

Run CarFax Report

Run vehicle history report

Diagnostics explained: compression, leak down and oil checks

What a compression test shows

A compression test measures cylinder pressure during cranking and helps identify weak cylinders that can point to worn rings, valves, or head gasket issues. Results that vary widely between cylinders suggest a problem worth deeper investigation Car and Driver review.

For a used 370Z, compression numbers within a manufacturer suggested range and close to each other are a good sign, while a low or uneven reading warrants consideration of ring or valve wear.

Interpreting a leak down test

A leak down test pressurizes each cylinder and measures the percentage of leakage, helping specify the failure source, for example piston rings, valve seating, or head gasket leaks; it is more diagnostic than a raw compression test Car and Driver review.

Ask your mechanic to note where leakage routes during the test, as routing to the intake, exhaust, or crankcase points to different underlying causes and different repair scopes.

How to assess oil consumption from records

Assess oil consumption by comparing documented oil top ups and oil change intervals over time; consistent top ups between changes indicate elevated consumption. If the seller cannot produce records showing stable levels, request a measured fill and a short monitored drive to check for rapid loss MotorTrend long term test.

Collect two or three recent oil level entries or service receipts to see whether consumption is a chronic pattern or an isolated issue.

Maintenance and running costs to expect for a used 370Z

Routine maintenance for the 370Z follows typical sports car patterns: regular oil and filter changes at recommended intervals, ignition tune ups, brake and tire care, and periodic gasket or seal repairs as needed Consumer Reports overview. See common issues lists triangle car care.

Industry analyses indicate that coil replacements and gasket repairs are commonly reported outlays, while total ownership cost varies by year, mileage, and local labor rates iSeeCars ownership analysis.

Use the rough calculator above to compare similar listings, but remember it provides only directional context not a definitive cost for a specific car.

How common modifications and tuning affect longevity

Modifications and tuning change component stress and failure patterns; increased boost, aggressive tuning, or hard track use accelerate wear on ignition, valvetrain, and oil control systems, according to owner reports and industry discussions CarComplaints overview.

Public datasets do not fully resolve long term failure rates for heavily modified examples, so ask for recent tune history, dyno sheets, and invoices for supporting hardware when evaluating a modified 370Z iSeeCars ownership analysis.

Model year differences, recalls and service bulletins to check

Check the NHTSA recall page and search for service bulletin history for the specific model year and VIN; most recalls for the platform through 2024 to 2026 involve non engine safety items, but VIN specific results show applicable open actions NHTSA vehicle page.

Service bulletins from dealers can note recurring maintenance items or recommended inspections; ask a dealer or independent shop to run the VIN and share any manufacturer bulletins that apply to that car.

Buyer mistakes and inspection pitfalls to avoid

A common mistake is relying only on a short test drive or a cursory visual check. A short drive may not reveal intermittent misfires or slow oil consumption, so require records and mechanic diagnostics when possible Car and Driver review.

A second pitfall is assuming a single recent repair resolves a chronic issue; check whether the same component has been replaced multiple times and ask for invoices showing parts and labor details.

Three real world inspection scenarios and what they mean

Scenario A: low mileage, modified example

Action: Request dyno sheets, tune logs, and invoices for supporting hardware. Priority checks: ignition system, oil control, and intake plumbing. Decision: Proceed if documentation shows conservative tuning and recent professional service; otherwise seek more evidence.

Scenario B: high mileage, well serviced car

Action: Ask for a compression or leak down test, review service history for regular oil changes, and inspect for fresh gasket work. Priority checks: ignition coils, valve cover area, and measured oil consumption. Decision: A well documented high mileage car can be acceptable when diagnostics are clean.

Scenario C: low paperwork, inconsistent oil entries

Action: Treat as higher risk, request immediate compression or leak down testing, and get a written repair estimate. Priority checks: oil level trends, evidence of sludge, misfire codes. Decision: Walk away or negotiate a deep inspection contingency if records are missing.

When to walk away: red flags that suggest high engine risk

Immediate no buys include evidence of severe oil sludge, persistent misfire that diagnostics cannot explain, or inconsistent mileage readings that suggest odometer tampering or rollback CarComplaints overview.

Other red flags are an absence of service history together with reported oil consumption or visible leaks, and documentation that the car was raced or heavily modified without supporting maintenance records.

Summary: practical answer for used buyers

Key takeaway, the VQ37VHR in the 370Z is generally durable for a performance V6 but has recurring wear items that are detectable with targeted checks such as compression or leak down, ignition inspection, and valve cover leak checks MotorTrend long term test.

Immediate next steps before contacting a dealer: verify oil records, request a compression or leak down test, and obtain a vehicle history report to review listings and pricing context.

Next steps and useful resources

Obtain a vehicle history report and compare pricing context to similar listings in your area before contacting a dealer, and use dealer transparency signals and service records to prioritize listings that reduce uncertainty iSeeCars ownership analysis.

CarFax Deals serves as a verification layer that can help you surface vehicle history reports and pricing insights so you can compare listings faster and focus inspections on the most likely issues.