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Originally Posted by azev
Wow, thank you for the detail information, this would help alot.
Ok this is what I have done so far:
- oil/filter change with castrol syntec
- replace microfilter with the carbon version
- replace stock air filter with k&n drop in
- replace final drive (rear differential)fluid with redline oil
- flush the brake fluid and replace them using original bmw brake fluid
- flush radiator and replace them with OEM fluid
- got 4 new tires (should be in monday)
I notice that my X5 has a lot of negative camber on the rear. My inside rear tires are worn really bad, while the outer side still have about 15-20% of thread left. Is this normal ?? should I get an alignment when I install my new tires? If I do, can a regular tire shop such as firestone able to do the alignment? (I used to have a E36 M3 and I had to buy a special tools to adjust the toe setting) I called dealer and they wanted $150 for 4 wheel alignment**ridiculous**
I dont think I am going to replace the tranny and the transfercase fluid for now yet, maybe later when I hit over 100k. Do you think this is safe?
Should I replace the fuel filter? I heard fuel filter need to be replaced every 50k!
How about waterpump, hoses, and drivebelt??
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Regarding above
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The X5 has considerable negative camber (especially with the sport package) so inside tire wear is normal. Only if one rear tire is wearing considerable more than the other on the inside would I consider an alignment. I've got 78,000 miles on my 2001 and have never aligned it, and don't intend to do so unless I "curb" it or have to replace a suspension part that would make it necessary. As I said previously, just "flip" the tires on the wheels so that the un-cosmetic inside of the tire is on the outside and you'll essentially double the wear of the rear tires.
As for the transmission fluid, if your service is not severe like mine (I pull an 8,300 GVWR trailer) it shouldn't hurt to go to 100,000 miles before change out.
The fuel filter will tell you if it becomes restricted, as the engine will probably not be able to take full throttle without loosing power due to lack of fuel flow through the restricted filter. I've found that if you fuel up at quality stations (they have inline filters in the dispensers) you'll probably never need to replace the filter; therefore I'd leave it alone (again mine has 78,000 miles on it).
As for the water pump, hoses and belts: Water pumps usually don't catastrofically fail, the seal just starts leaking so I wouldn't mess with it until it does. The hoses deteriorate primarily with age and heat, but shouldn't give trouble as your vehicle is relatively new. The belts also deteriorate with age and heat, but additionally they have a finite number of revolutions in them, so if the vehicle miles are "city" miles they will probably need replacing sooner than vehicles with "highway" miles. My 2001 has about 80% highway miles and the belts are still servicable.