My 2009 Clubby S has been pretty trouble free over the last 89K miles. The other day I was headed home and took my favorite roundabout onramp, and just as I give it the wellie it dropped a cylinder. I limped on home about 4 miles and pulled into the driveway. I went into the shop and got my inexpensive little HF code reader and plugged it in - result - miss on cylinder 4. Well, no kidding! I had only put about 25K on the new plugs and still had the original set that I replaced at around 60K, they still looked new so I swapped in one of those and fired it up.....no change so I knew it wasn't the plug. Moving up the order of expense I swapped the coil pak from #3 and #4, still missed (Aha!) of course, so I drove it around the block to make sure it set the code. Sure enough, miss on cyl 3 was now set in the code reader. At least I knew then it wasn't an internal engine failure! Yay. I called the dealer and they had the part in stock for $85 plus tax...…..hmmmm. Went online and found the exact OEM part on Amazon for $25, so I bought 2, figuring it would be a good idea to have a spare. These are not prone to failure - in fact the failure rate is extremely low unlike the millions of these Bosch replaced for Audi, VW and the like. Still,, when it goes it does not recover, so I think it's just a good spare to have onboard, especially since I do so many long distance runs to Mini events pulling my classic. Swapping one out takes all of about 1 minute, you simply pull the cap up and it pushes the connector off the pins, Twist the coil as you pull up and off it comes. Installation is the reverse as Haynes famously says. I fired it up and sure enough it ran as smooth as buttah! Just in time for the Mini/MINI run this weekend. It's supposed to be really HOT Sunday so I was dreading but resigned to driving the classic as I have a celebration of life to attend immediately after the event. I'll probably drive the classic anyways - if it's not TOO hot - but now at least I have a choice.