Generations
Z34 — Z34
2010–2021
3.7L V6
Top issues to watch for
The most serious Nissan 370z problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.
Major
Oil gallery gasket failure (Z34 early)
Early VQ37VHR engines use paper gaskets in the oil gallery system that can fail and cause internal oil leaks within the engine block. This reduces oil pressure to critical components including the timing chain tensioners and variable valve timing system. The failure is most common on 2010-2012 models and was addressed with revised gaskets in later production. Unlike external oil leaks, gallery gasket failure may show no visible symptoms until oil pressure drops critically low.
What happens if ignoredComplete gallery gasket failure can starve the timing chain system of oil pressure, leading to timing chain stretch, tensioner failure, and catastrophic engine damage. Repair requires engine disassembly to access the internal oil galleries. Total repair costs typically range £2,000-£4,000 depending on associated damage.
Specialist
£1,200–£2,200
Main dealer
£2,000–£3,500
Parts only
£200–£400
Major
Clutch slave cylinder failure (Z34)
The Z34 uses a concentric slave cylinder (CSC) that sits inside the gearbox bell housing, surrounding the transmission input shaft. This design makes it vulnerable to clutch dust contamination and heat damage from the clutch friction disc. When the internal seals fail, brake fluid leaks into the clutch housing, contaminating the friction disc and causing clutch slip or complete loss of hydraulic pressure. Replacement requires gearbox removal, making this an expensive repair even when caught early.
What happens if ignoredComplete CSC failure results in total loss of clutch operation, leaving the car immobile. Leaked brake fluid contaminates the clutch friction disc requiring replacement of both the CSC and full clutch assembly. Repair requires gearbox removal and typically costs £1,500-£2,500 including labour.
Independent garage
£800–£1,200
Specialist
£1,000–£1,600
Main dealer
£1,500–£2,200
Parts only
£150–£300
Major
Brake hose corrosion (Z34)
MOT data shows brake hose ferrule corrosion at 15.2 times the national average on Z34 models, with brake pipe corrosion also elevated at 2.5 times normal rates. The brake hard lines and flexible hose connections appear vulnerable to accelerated corrosion, possibly due to road salt exposure or inadequate protection. This affects braking system integrity and can lead to brake failure if the corroded components rupture under pressure.
What happens if ignoredCorroded brake lines or hose ferrules can rupture without warning, causing complete or partial brake failure. This represents a serious safety risk and requires immediate repair. Replacement of affected brake lines typically costs £200-£500 depending on the extent of corrosion, but the car should not be driven until repaired.
Independent garage
£200–£400
Specialist
£250–£500
Main dealer
£400–£700
Parts only
£50–£120
Minor
Manual gearbox synchromesh wear (Z34)
The 6-speed manual gearbox in the Z34 develops synchromesh wear, most commonly affecting 2nd and 3rd gear. The synchro rings lose their ability to match gear speeds during shifts, causing grinding or crunching noises particularly when downshifting or shifting quickly. This is accelerated by aggressive driving, track use, or infrequent gearbox oil changes. While not immediately dangerous, worn synchromesh makes the gearbox unpleasant to use and can eventually damage the gear teeth if ignored.
What happens if ignoredContinued driving with worn synchromesh will eventually damage the gear teeth and dog rings, requiring complete gearbox rebuild. Early intervention with synchro ring replacement costs £800-£1,500, while a full rebuild can exceed £3,000. The car remains driveable but shifts become increasingly unpleasant and difficult.
Independent garage
£600–£1,000
Specialist
£800–£1,400
Main dealer
£1,200–£2,000
Parts only
£200–£400
1 more known issues tracked
Including wear items, electrical niggles, and generation-specific problems.
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Related
Nissan 370z reliability FAQs
What are the most common problems with the Nissan 370z?
The Nissan 370z has 5 known issues across 2 severity levels. The most common problems relate to Oil gallery gasket failure (Z34 early) and Clutch slave cylinder failure (Z34).
Is the Nissan 370z reliable?
The Nissan 370z has 0 dangerous and 3 major known issues. No dangerous issues are tracked, which is a positive sign.
How much does it cost to fix Nissan 370z problems?
Costs vary by issue. Independent garages are typically 30-50% cheaper than main dealers for most repairs.