McLaren 12C
The original modern McLaren is now one of the more accessible ways into the brand, but it must be bought on specialist history rather than badge appeal. Many early software issues were improved over time, yet accumulator health, cooling leaks, and electrical condition still define ownership.
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Common Faults & Reliability
These are the most common documented problems for the McLaren 12C, sorted by their typical impact and frequency.
PCC Hydraulic Accumulator Failure
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.
Coolant Hose and Radiator Leaks
medium severityEarly McLarens are known for gradual coolant loss from hose connections, clamps, and front-end cooling hardware. Left unresolved, small leaks can become expensive breakdowns.
Headlight Condensation and Delamination
medium severityThe headlight units on early 12Cs are prone to internal condensation and delamination of the lens coating.
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