Good day!!

I may get a lot of hate mail about this thought, but I only change items that are broken or have worn out... I don't wait for a tie rod to fail before replacing it... Obviously... But an oxygen sensor is one that won't get changed unless the computer is telling me it is time... I think some items BMW recommends on replacing at certain time or mileage limits is Preventative Maintenance to keep the annoying CEL or SES light from illuminating... The other items, like LTF is them getting out of replacing fluid... I don't believe any fluid is made so well that it will last 300,000 miles...

So, my vote is replace when it gives a code or performance degrades substantially...

Cheers!!

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2001 E53 X5 4.4i (03-07-2001 build date) White exterior / hellbeige interior (6MT swap vehicle - Manny)
2002 E53 X5 4.6is (12-20-2001 build date) Imola Red exterior / M-texture interior (Red)
2003 E53 X5 4.4i (06-26-2003 build date) Silver exterior / Black interior (Silvester II)
2008 Mini Cooper S ragtop (04-17-2008 build date) Dark Silver exterior / Gray interior ( Topless)
BMWCCA member (#4745)