Common Problems with the
2021–2024 Porsche Boxster / Cayman (718)

We've identified 2 known issues that can affect the 2021–2024 Porsche Boxster / Cayman (718). None are considered critical, but they're worth knowing about before you buy.

Known Issues

Serious

Moderate

Minor

The 2021–2024 period has 1 more issue than the Porsche Boxster / Cayman (718) average across all year periods.

All Known Issues

Oil Separator (AOS) Failure

ModerateEngine

The air-oil separator can fail internally, causing oil consumption, blue smoke on startup, and rough idle. A common M96/M97-era issue that also affects 718 models.

Most affected: All models

Estimated cost: £300–£500Affects: 2016–2024Often appears around: 30k-60k miles

Typical symptoms

•Blue smoke on startup
•Rough idle
•Oil consumption
•Oil in intake

What to inspect before you buy

✓Check for blue smoke on cold start
✓Inspect intake system for oil residue

PCM Infotainment Glitches

MinorElectrics & Electronics

The PCM system on 718 models can suffer from screen freezes, Apple CarPlay disconnects, and Bluetooth connectivity issues.

Most affected: All models

Estimated cost: £0–£200 (Software update)Affects: 2016–2024Often appears around: N/A

Typical symptoms

•Screen freeze
•CarPlay disconnects
•Bluetooth dropouts

What to inspect before you buy

✓Ensure latest software is installed
✓Test wireless and wired CarPlay

Buying Tips for the 2021 Porsche Boxster / Cayman (718)

✓Listen for a metallic rattle from the turbo wastegate on early 2.0 and 2.5 models.
✓Check for coolant leaks near the water pump, a known weak spot on early 718s.
✓Ensure PCM is updated for wireless CarPlay stability.

2020 Porsche Boxster / Cayman (718)2025 Porsche Boxster / Cayman (718)