Never ever leave it to BMW to change it as part of the service. The time between changes is far too long. On an S certianly need to change it more frequently than the TLC/service intervals. It take 2 minutes and a torx bit/screwdriver and 0 mechanical knowledge to do. Cost if you do it every 10k is about £3 for a filter. If BMW do it every 10k they will charge a lot more!
My advice is to buy a panel filter like piper or kN (they do not alter your insurance) and then wash and oil them every 10k at least yourself.
If I remember right (I have had an Alta CAi for ages) then its either just some small clips or a couple of torx bit scres that keep the lid on the stock box. Take the lid off and take the panel out...throw away and fit a replacement paper panel or an uprated KN/pipercross one. Screw the lid back on.
Worth investing in a haynes manual for £14 from halford...its been invaluable to me
When i got my 03 MCS last November the car had 32000 mile on the clock and if you drove it hard you could here a loud chattering noise from the engine, i had the car inspected by my local mini dealer but the could not find any fault with the car and i was told not to worry about it
Anyway to cut a long story short i decided to fit an Alta cold air kit, so on removel of the old air box and filter i found the filter Tobe very dirty and misshaped.
Now the car runs alot smother and the noise has gone. although the TLC pack looks good value i do think they are skipping on what would be normal replacement service items
The clip is a sort of almost one use. I am assuming you mean the sort of jubilee ring clip on the air pipe?
The way most people deal with it is they get the old one use (it can be reused but difficult) and measure its diameter...then go to halfords/supply place and buy a corect size jubilee ring and use that instead...makes for easier removal and refit at later dates. BMW also can sell the proper clip to you for a few pennies.
Oh if you want to you can get a pair of needle nose pliers and use them to pinch the 2 humps together until the little pin slots into the hol and closes the ring clip up. Brute force and careful manipulation will work if the original clip is not too damaged.
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