The 12C launched as McLarens first modern road car, featuring a 3.8-litre twin-turbo V8 producing 592bhp and the ProActive Chassis Control (PCC) hydraulic suspension. These early cars are the most affordable but carry the highest risk of PCC accumulator failure and coolant hose leaks.
The 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.
Early McLarens are known for gradual coolant loss from hose connections, clamps, and front-end cooling hardware. Left unresolved, small leaks can become expensive breakdowns.
The headlight units on early 12Cs are prone to internal condensation and delamination of the lens coating.