I would agree that 140,000 miles is a good time to have it changed. The diesel engine in your Mini is an interference engine, meaning that if your auxiliary belt breaks as a result of wear, the pistons will hit the valves and destroy your engine. I would strongly advise you to have it replaced as per the recommendation you have been given.

2020 Mini Cooper Timing Belt Or Chain; Engine Belt Or Chain Interference or Non-Interference

106 posts · Joined 2009. #1 · Nov 19, 2011. Hello, I have a 2004 Mini Cooper S with 73,000 miles on the clock. Its running fine at the moment, well cost me £650 last week for the power steering. At what age/mileage does the cam belt / timing belt / super charger belt need replacing ?

There may be one at 150-200k or something. Lacking such information, I would tend to treat it like any other timing chain issue, unless I know there is a specific problem with the chain (i.e. slop in timing from wear) then I would replace it when I rebuild the engine. 08 RAV4 Limited AWD V6. 05 RAV4 S FWD 5spd -traded for 08.

The timing chain replacement interval for a Mini Cooper varies depending on the model year and engine type. However, most Mini Cooper models require a timing chain replacement every 100,000 miles or 10 years, whichever comes first. Replacement Interval (miles) 1.8L 4 Cyl. 122 hp (MR18DE) timing chain Although a timing chain will wear over time it is usually good for the lifetime of the 1999 CLK 320 (208 365) 112.940 90k miles. A Mercedes mechanic friend of mine said that I have no need to replace the timing chain at 100K miles, as there are no nylon parts to wear out, and my DVD manual shows the chain looking pretty metal looking. I haven't explored the DVD that thoroughly, as it is pretty damn intimidating and complicated QevDs.
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  • mini timing chain replacement interval