Originally Posted by toddstebleton' post='1035383' date='Oct 18 2009, 06:48 PM

2004 525i

I only have 44K on this vehicle, but here's what I'm planning to replace sometime before 80K.

Spark plugs every 40K (possibly wires), timing belt/water pump/thermostate/belts/idlers, battery, air filter (every 20K), fuel filter (every 40K), oxygen sensors, cabin filters (every 20K, with air filter), check all coolant/radiator hoses. Some control arms will likely be replaced between 40-80K.

Probably replace by 100K

All coolant/radiator hoses, coolant tank, radiator, exhaust components, differential seals, transmission service (filter, new gaskets, seals, fluid), maybe alternator.

I also have an Audi A4, so many of these thoughts are from my experience with that vehicle - fyi. If you have experience something different or if this sounds ridiculous, let me know.

Originally Posted by kaiten408' post='935954' date='Jul 7 2009, 11:20 PM

2005 545i

- lower radiator hose replaced due to leak @ ~40K miles
- door seals on driver and passenger replaced @ ~40K (there was major tears in them from previous owner, i just replaced them under warranty)

I think all hoses in the engine bay should be checked regularly and dressed with some protectant to keep them from cracking, etc. along with the door seals

@ V_therussian: What happened to your control arms? I've been getting a slight vibration in my car on highways. I've had it checked out and I know for a fact that two of my wheels have ever-so-slight bends in them, but in the back of my mind I keep thinking about the upper & lower control arms

Originally Posted by brabusw209amg' post='1052848' date='Nov 11 2009, 11:26 PM

Guys, a freakin starter is only $177.46 with an $80 core exchange charge. An alternator is $361.24. O2 sensor is $129.17 before cat and $114.89 after cat. Fuel pump is $245.60. Why are you guys PAYING so much???? Thermostat is $57.92.

www.drivewire.com is your friend! Their prices are fair and you get your parts quick.