Porsche 718 Boxster

The most discussed issue on the 718 2.0. The wastegate actuator is positioned low on the turbocharger and is susceptible to water ingress and corrosion, particularly in wet climates (UK reports are disproportionately common). Symptoms include sudden loss of boost pressure (dropping from 14 psi to 5-8 psi), power dips around 5,000 rpm, or an EPC warning light. Some cars have experienced this as early as 8,000 km. If caught early, the actuator can be freed and greased for €200-400 at a specialist. However, if the actuator has caused internal turbo damage or Porsche insists on a full turbo replacement, costs reach €2,500-5,000. Porsche has redesigned the turbo boost converter with an added filter as a countermeasure. Regular spirited driving helps prevent seizure.

The 718 uses a variable-flow water pump that relies on a vacuum-operated seal to regulate coolant flow. This seal can fail, allowing coolant to enter the vacuum lines. Failures have been reported as early as 20,000 km, with one owner needing three replacements within 30,000 km. Symptoms include coolant warning lights, a sweet coolant smell, or visible coolant loss. The pump itself costs around €300-500, but labor on the mid-engine 718 requires partial exhaust removal, bringing total costs to €800-1,400 depending on whether you use a Porsche dealer (€1,100-1,400) or independent specialist (€800-1,000). Some owners have received goodwill warranty coverage from Porsche due to the abnormally high failure rate.

From early 2019, European-market 718 models were fitted with a gasoline particulate filter (GPF). Like diesel DPFs, these can clog if the car is driven predominantly at low RPM or on short trips where the filter never reaches regeneration temperature. Some owners have seen 100% saturation on diagnostic logs within 20,000-30,000 km. Porsche has quoted up to €9,000 for replacement, as the GPF is integrated with the catalytic converter. A forced regeneration at a specialist costs around €500-600 and may resolve the issue. Prevention is straightforward: regular spirited driving at 5,000-6,500 rpm for a few minutes every week or two. This issue does not affect pre-2019 cars without GPF. US-market cars also lack a GPF.

The PDK dual-clutch transmission is generally reliable when properly maintained, but neglecting fluid changes (recommended every 60,000 km or 4 years) can lead to expensive failures. The most common PDK issue is the distance sensor, which can cause loss of reverse gear or limp mode. Sensor replacement with the gearbox in the car costs approximately €500-2,500 depending on the shop. If the entire PDK unit needs replacement, costs reach €25,000-30,000, but this is rare and typically caused by prolonged neglect. The key preventive measure is strict adherence to the PDK fluid service interval. Manual-equipped cars do not have this risk.

The air oil separator prevents crankcase vapors from contaminating the intake system. When the internal diaphragm deteriorates, oil mist enters the intake manifold, causing misfires, rough idle, blue or white exhaust smoke on startup, and increased oil consumption. In severe cases, oil particles can clog variable camshaft timing oil passages. Replacement costs €800-1,500 depending on the shop, as the tight mid-engine layout makes access difficult. This typically occurs at higher mileages (80,000+ km) and is more common on cars used for spirited driving or track days.

The Boxster's electrically operated convertible top uses a complex mechanism with ball joints, microswitches, and small transmission gears. Ball socket joints are designed as sacrificial components that break before more expensive parts are damaged. Replacement ball joints cost under €20 but labor adds up. Microswitch failures prevent the roof from operating and cost €100-200 for the part plus significant labor (€300-800). More serious transmission gear failures or hydraulic issues can reach €1,500-2,000. Regular operation and keeping drain channels clear helps prevent issues.