2009 NISSAN 350Z

Typical onset: 80,000-140,000 mi

Symptoms: Blue smoke on startup or hard acceleration, Burning through 1+ quart every 500-1,000 miles, Fouled spark plugs, Loss of power under load

Fix: Piston rings lose tension from heat cycling and aggressive driving. Requires full engine teardown, re-ring or new pistons, hone cylinders, replace all gaskets and seals. 25-35 hours labor depending on shop efficiency and parts sourcing.

Estimated cost: $4,500-7,500

Typical onset: 60,000-120,000 mi

Symptoms: Transmission fluid leaking near radiator area, Milky or pink coolant in overflow tank (cross-contamination), Transmission slipping or erratic shifts, Overheating transmission

Fix: Factory cooler lines and internal radiator cooler corrode or crack, mixing ATF and coolant. Must replace cooler lines, often the radiator if contaminated, flush both systems completely. If coolant entered trans, rebuild or replace transmission. 3-6 hours for lines/radiator, add 15-20 hours if trans damaged.

Estimated cost: $800-1,200 (lines/radiator only), $3,500-5,500 (if trans compromised)

Typical onset: 70,000-110,000 mi

Symptoms: Grinding or difficulty engaging 5th or 6th gear, Gear pop-out under load, Notchy shifts into higher gears, Metallic debris in trans fluid

Fix: Synchros wear from hard shifting and clutch dumps common with sporty drivers. Transmission must come out, full teardown, replace synchro assemblies and inspect gears for damage. 12-16 hours labor plus parts.

Estimated cost: $2,800-4,200

Typical onset: 60,000-100,000 mi

Symptoms: Clunking from rear end on acceleration or deceleration, Vibration at highway speeds, Wheel hop during hard launches, Visible torn or collapsed differential mount bushings

Fix: Rear subframe and differential bushings deteriorate from torque and age. Replace all differential mount bushings and inspect subframe bushings. 3-5 hours labor depending on rust and access.

Estimated cost: $600-1,100

Typical onset: 90,000-130,000 mi

Symptoms: Hard starting or no-start condition, Loss of power at high RPM, Engine stumbling under acceleration, Fuel pump whine audible from rear

Fix: Fuel filter (in-tank, part of pump assembly) clogs or pump motor wears out. Drop tank, replace entire fuel pump assembly including filter sock and level sender. 4-6 hours labor.

Estimated cost: $800-1,400

Typical onset: 50,000-90,000 mi

Symptoms: Excessive drivetrain movement during shifts, Clunking when engaging clutch or shifting, Vibration through shifter and cabin, Visible cracks or separation in rubber mount

Fix: Rubber transmission mount degrades from heat and torque. Replace mount (often upgraded to polyurethane aftermarket). 1.5-2.5 hours labor.

Estimated cost: $250-450

Typical onset: 100,000-150,000 mi

Symptoms: Check engine light with P0420/P0430 codes, Loss of power and poor fuel economy, Rattling from exhaust on startup, Rotten egg smell from exhaust

Fix: High-flow cats degrade from heat and oil consumption fouling. Replace both cats and upstream O2 sensors preventively. 4-6 hours labor if using aftermarket high-flow options.

Estimated cost: $1,200-2,200