2022 PORSCHE 718 BOXSTER GTS

Typical onset: 15,000-40,000 mi

Symptoms: High-pitched whine in neutral with clutch out, disappears when clutch pedal is depressed, Gets louder with engine RPM, not vehicle speed, No grinding or difficulty shifting, just noise

Fix: Transmission removal and bearing replacement. Input shaft bearing failure is a known weak point on the manual 718 boxes. 12-15 hours labor to drop trans, split case, replace bearing and seals, reassemble. Some shops opt for full rebuild at this point.

Estimated cost: $3,500-6,000

Typical onset: 30,000-60,000 mi

Symptoms: Clunk on throttle lift or acceleration, Excessive driveline movement felt through shifter or floor, Vibration at idle in gear

Fix: The rear transmission mount (dogbone) fails from heat and vibration. Easy access from underneath, 1.5-2 hours to replace. Use OEM or upgraded polyurethane mounts. Check all motor mounts at the same time.

Estimated cost: $400-700

Typical onset: 40,000-80,000 mi

Symptoms: Metallic knocking on cold start that diminishes when warm, Low oil pressure at idle when hot, Metal flakes in oil or on magnetic drain plug, Knock intensifies under load

Fix: The 4.0L flat-six can develop rod bearing clearance issues, especially in track-driven or high-RPM use cars. Requires engine removal, teardown, bearing measurement and replacement, crank polish if needed. 30-40 hours labor. If caught early, bearings and machine work suffice. If spun, expect crankshaft replacement and potential cylinder scoring. Preventive oil analysis every 5k miles is critical on these.

Estimated cost: $8,000-15,000

Symptoms: Transmission fluid spots under car, usually passenger side, Low fluid warning on PDK-equipped cars, Burnt transmission fluid smell after spirited driving

Fix: Hard lines and fittings to the trans cooler crack from vibration or stone strikes. 3-4 hours to drop undertray, replace lines, bleed and refill PDK or manual trans. Must use genuine Porsche lines; aftermarket fitment is poor.

Estimated cost: $800-1,400

Typical onset: 20,000-50,000 mi

Symptoms: Hesitation or stumble under hard acceleration above 5,000 RPM, Intermittent lean codes (P0171/P0174), Loss of power at high RPM, fine at cruise

Fix: In-tank fuel filter clogs prematurely on cars running E10 or higher ethanol blends, especially if parked long periods. Requires fuel tank drop, pump module removal, filter replacement. 4-5 hours labor. Replace fuel pump strainer and check in-tank lines while you're in there.

Estimated cost: $900-1,600

Typical onset: 50,000-100,000 mi

Symptoms: Oil weeping visible on cylinder head mating surface, usually rear bank, Slight oil consumption (1 qt per 3,000 mi), No coolant loss, no overheating, no combustion gas in coolant

Fix: The 4.0L can develop minor head gasket seepage without full failure. Not an emergency, but will progress. Engine-out service: 25-30 hours to pull engine, heads off, resurface if needed, new gaskets, reassemble. If oil consumption is tolerable and no external drips, many owners defer until 100k+ miles.

Estimated cost: $7,000-10,000