Yea guys Lifetime is a relative term lol They're not talking your lifetime , in general though I checked the color of mine recently granted I only have 50K miles basically on my E53 but it looked practically new so as of now not worried about it.
At 100k or so I may change it out along with the filter. It's pretty simple guys maintain your vehicle it will run forever it's like preventative medicine lol

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2006 X5 4.4i