today i went in to ocean bmw in plymouth uk asked for a price fore the latest timing chain kit for petrol mini gen 2 and gen 3 fitted with the n12 n14 n16 n18 engines and was shocked at the prices in a good way, for new chain, new latest chain tension'r ie longer top guide both side guides bottom sprocket this is a common fit for 60-70,000 miles to repair them just over £215 for genuine parts that also have a 24 month warranty on them,, dont forget to add new bolts on this or course ie £15 tops, so from now on i will be fitting factory chains kits by far the best option at those prices, guess bmw have realised the problem with these chains in fact the parts guy said he has sold a lot of them over the years. a big part of the cost is the revised tension'r its £53 for the latest and by far the best one..