Nissan Bluebird Sylphy G10: common faults & what to check

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The RE0F10A continuously variable transmission fitted to MR20DE-equipped G11 Sylphys is prone to a low-frequency shudder or judder sensation under light-throttle acceleration between approximately 20–60 km/h. The root cause is micro-slippage between the steel push-belt and the primary or secondary pulley faces, exacerbated by degraded CVT fluid that loses its friction-modifier properties; Nissan issued Technical Service Bulletin NTB08-008 (and subsequent revisions) addressing this condition, prescribing a drain-and-fill with NS-2 or NS-3 Matic fluid and, in persistent cases, replacement of the push-belt assembly or complete CVT unit.

Where to look: Transaxle mounted transversely in the engine bay, beneath the engine on the passenger side

Parts involved: CVT belt and pulleys.

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The MR20DE 2.0-litre engine uses a hydraulic primary timing chain tensioner that relies on pressurised engine oil to maintain chain tension. When the vehicle sits overnight or for extended periods, oil drains back from the tensioner, allowing chain slack to develop; on cold start the chain slaps against the upper timing cover for several seconds until oil pressure is restored. Nissan documented this behaviour in TSB NTB09-046, noting that extended rattle periods indicate worn tensioner ratchet pawls or a fatigued tensioner spring, which if left unaddressed accelerates timing chain and guide wear and can ultimately cause timing deviation or chain failure.

Example of the part — not this vehicle

Where to look: Upper front of the engine block, behind the timing cover on the driver-side of the engine bay

Parts involved: Timing chain.

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CVT fluid temperature rises under sustained motorway or hill-climbing use causing the gearbox to enter limp mode.

Where to look: See description

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The 2.0 MR20DE fitted to the G11 and B17 is prone to burning oil as it ages, from worn piston rings, and owners of 2008-2010 cars in particular report needing to top up between services. Left unchecked the low oil level accelerates timing-chain and bearing wear and can foul the catalytic converter. It is a slow-burn issue rather than a sudden failure, but a car that has been run low is higher risk.

Where to look: Engine - pistons/rings and valve seals

Parts involved: Catalytic converter, Timing chain.

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Both the MR20DE and HR16DE engines fitted to the G11 Sylphy use a drive-by-wire electronic throttle body without a mechanical cable; the throttle plate and bore accumulate carbon deposits over time from crankcase ventilation gases passing through the intake. Carbon buildup reduces the effective bore diameter and disrupts the precise throttle-plate-to-bore seal required for idle control, causing the ECU to lose authority over idle speed. The condition manifests as an unstable or high idle after a cold start, hesitation on tip-in from idle, and occasionally a stalling tendency; Nissan specifies periodic throttle body cleaning and idle relearn procedures (using Consult-III) after cleaning.

Where to look: Intake manifold, mounted at the front of the engine where the air intake duct connects; accessible from the top of the engine bay

Parts involved: PCV / oil separator.

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The G11 Sylphy replaced hydraulic power steering with a column-mounted Electric Power Steering (EPS) system; the assist motor and its Electronic Control Unit (ECU) are mounted on the steering column below the dashboard. The EPS control unit is susceptible to failure caused by heat cycling and internal connector corrosion, causing the system to drop to a reduced-assist or no-assist fail-safe mode. Nissan issued service campaign SC-10-006 in certain markets covering EPS ECU replacement at no charge, and the fault is captured in the ECU as a B-code steering system DTC which will also illuminate the EPS warning light on the instrument cluster.

Where to look: Steering column, beneath the instrument panel on the driver's side; the EPS motor is clamped to the lower steering column

Parts involved: Steering rack.

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The G11 Sylphy uses a rear torsion beam axle where the beam is located by two large rubber bushes pressed into the body-side mounting brackets. These bushes are subject to constant torsional loading and are exposed to road grime; they harden, crack, and eventually collapse, allowing excess movement of the rear axle relative to the body. Collapsed rear bushes shift the rear wheel alignment outside specification, cause increased tyre wear on the inner edge of the rear tyres, and produce a characteristic clunking or knocking from the rear of the car over undulations — a finding that will fail a New Zealand Warrant of Fitness inspection under the suspension section.

Where to look: Rear of the vehicle, at the forward mounting point of each torsion beam trailing arm where it bolts to the body subframe

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The front lower control arm ball joints on the G11 Sylphy are a pressed-in design with a rubber boot that is vulnerable to splitting in the wet and salt-laden conditions common to New Zealand roads. Once the boot tears, water and grit enter the joint, accelerating wear of the ball-seat; this produces increasing clunking over bumps and allows measurable play that degrades steering geometry. Because the ball joint is an integral part of the lower arm on many aftermarket replacements, the repair typically involves the whole arm, increasing cost compared to markets where the joint is sold separately.

Example of the part — not this vehicle

Where to look: Lower front suspension, at the outboard end of each front lower control arm where it connects to the front hub/knuckle

Parts involved: Ball joint.

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The front brake calipers on the G11 Sylphy use a sliding single-piston design where the caliper body floats on two steel guide pins running in rubber-booted bores in the caliper bracket. In the wet, salt, and road-spray conditions typical of New Zealand operation, the guide pin boots split and allow water and road grime into the pin bore, causing the steel pins to corrode and seize within the bracket. A seized guide pin prevents the caliper from releasing fully after braking, causing continuous light pad-to-disc contact, rapid and uneven pad wear, disc overheating, and a vehicle that pulls to one side under braking — a condition that is also a WOF failure under the braking system section.

Where to look: Front brake assembly on each front wheel, at the two guide pin bores in the caliper mounting bracket

Parts involved: Brake disc and pads.