hanswuk
New Member
In respect of the latter, brake fluid change two years or not, AND if its only a "recommend" then its not a warranty 'essential' in my humble opinion AND in a legal one I bet too. In the same way that an engine oil change never appears as a mere "recommend" in any service schedule, it simply states replace meaning that if you fail to do so then liability rests with yourself and not the manufacturer!
The brake fluid issue is a thorny one on this forum isn't it! Brake fluid deteriorates because it is hygroscopic ie. it absorbs water from the atmosphere which then reduces the boiling point. Water boils at 100 degrees whereas brake fluid, when new and pure, boils at around 230-280 degrees (depending on the grade used). However the more water that is absorbed the lower the point at which it will boil (with the result that you have no brakes) with fluids which started at a higher level taking longer to reach the critical level of around 180 degrees at which it should be replaced. The rate at which water is absorbed is mainly time and atmosphere related and the industry generally recommends 2-3 years for a precautionary change although in practice this is not always necessary. A car used normally in the UK will be at a much lower risk of brake fluid boiling than one used for coming down long mountain passes or constantly braking from high speeds. Peugeot's mistake is not that they don't replace the fluid automatically after 2 years but that they say one thing in the handbook and do another in practice.