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View Full Version : Proper interval for Serpentine and AC belt change, CBS Question & PWR Steering sound



bimmerguy105
01-09-2014, 12:28 PM
My 2004 525i has just reached 62k miles and I was wondering if I should be changing the Serpentine and AC belts when I get my car serviced next time in August? It squeals a bit upon startup in cold weather but goes away once I start driving it. Other than that, the car pretty much runs like a top. It only gets driven a few thousand miles a year as evidenced by the current mileage. I know the plugs don't call to be replaced until 100k miles but is there any other recommended maintenance? I read that the e60's have water pump issues and should be proactively replaced. I had all fluids flushed and replaced around 55k miles. Air and cabin filters have also been replaced.

I was also wondering how the CBS system knows the mileage until something needs changing. I know there are sensor based and internally calculated based items. I had my brake fluid flushed at the 55k mile mark but it's saying that I'm way overdue for it. Is this because the mechanic at my independent shop didn't reset it? I'm assuming the internally calculated items need to be manually reset after servicing while the sensor based items don't? Any insight to this matter would be greatly appreciated! Thanks for your help guys.

In an unrelated note, I have had some slight "fluid" sounding noise being emitted when I'm making turns. Is this an indication that my power steering pump is going bad? It's almost as if I can hear the power steering fluid going through the lines. Thanks again!