McLaren 650S
An evolution of the 12C with P1-inspired styling and more robust mechanicals. It still uses the complex PCC suspension and is sensitive to electrical health.
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Common Faults & Reliability
These are the most common documented problems for the McLaren 650S, sorted by their typical impact and frequency.
PCC Hydraulic Accumulator Wear
high severityThe nitrogen-filled accumulators are wear items with a 3-5 year lifespan. When they fail, the car feels excessively stiff (often called riding on "wagon wheels"). This also causes steering "dead spots" as the system loses pressure regulation. While dealers charge £3,000+, specialists like Thorney Motorsport offer full sets for ~£1,500–£1,800.
IRIS Infotainment Lag and Glitches
low severityThe IRIS 2 system is better than the original but can still suffer from slow boot-up times and connectivity issues.
Gearbox Coolant Weep and Input Shaft Seal
medium severityA slow drip of pink coolant from the gearbox housing indicates the input shaft seal at the clutch/coolant interface is breaking down. Caught early, it is a straightforward seal replacement. If ignored, coolant migrates into clutch oil, causing dual-clutch judder and slipping, requiring a full clutch pack rebuild.
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