And i would have to disagree.
Most likely the miles were not low as stated. The problem with plastic and rubber are the heatcycles . Both harden and get brittle from heatcycles. If there are no heatcycles the properties of the plastic and rubber do not deteriorate with age or at least not drastically to the point of failure. This is the reason plastic and rubber are pollutants number one on this planet , because of their properties. I am driving my car for over an year now ~1.5 years .There is not a single plastic part that has failed despite them being 23 years old and i expect this to keep up based on my driving for at least 3-4 more years. I do not expect any failure of plastic parts until the car gets to around 160K km , which is around 100K miles. Around that time i anticipate deterioration in the plastic will be enough for cracks to appears. Meantime , while on this topic. Does anyone know , if a company produces a cap for the expansion tank, which is rated less than 1.1bar . I am searching for a cap that hold pressure 0.9 bar like the ones on some japanese cars. If anyone is aware of a cap that has weaker spring let me know.