Porsche Boxster / Cayman (718) Common Problems & Reliability

The Porsche 718 generation (Boxster and Cayman), launched in 2016, marked a significant era for the mid-engine model line by introducing turbocharged four-cylinder engines to the standard range. While the move from the traditional flat-six was controversial among purists, the 718 brought a significant increase in low-end torque and overall performance, making it one of the most capable sports cars in its class. In the UK, it remains a favorite for its exceptional chassis balance, class-leading PDK transmission, and the prestigious badge that ensures strong residual values. Reliability for the 718 has been generally good, but the switch to turbocharging introduced specific cooling and mechanical watchpoints. Early models (pre-2019) are prone to water pump failure, which often manifests as a slow coolant leak that can lead to overheating if not addressed promptly. Some manual cars have also been reported to suffer from a "notchy" shift or grinding when engaging second gear from cold, and the active transmission mounts—part of the optional Sport Chrono package—are a known wear item that can trigger dashboard warning lights. Additionally, like many modern Porsches, the PCM infotainment system can occasionally suffer from freezes or lag. When buying a used 718 in the UK, a Porsche Approved Warranty is highly recommended to cover potential high-cost component failures. Prospective owners should carefully check for any condensation in the headlights and taillights—a common minor issue—and verify that the service history includes regular oil and PDK fluid changes. It is also vital to request a DME "over-rev" report on manual cars to ensure the engine hasn't been subjected to abusive downshifts by a previous owner. For those seeking the ultimate 718 experience, the later "GTS 4.0" and GT4 models returned to naturally aspirated flat-six power, though they carry a significant price premium on the used market.