Qxxx4 wrote:yep fueler said it right. I see alot of guys selling their pathys/q's at 160k kms because the timing belt needs to be replaced at that mileage and is around $1000, so look out for that. also try to get someone whose got records....most especially the 4wd system...if the differential and transfercase fluids werent changed...it could be extremely costly to fix. people are idiots.
Since you're south of the border, I'll translate it into the screwed up distance measurement system we use in the U.S. The timing belt and water pump should be replaced at 100,000 miles. The reason we stress the water pump is because they are using the same belt and the major expense is removing all of the crap to get to it. Since you are paying 6 hours of labor to get to the belt, pay the extra money to replace the pump. When we were shopping around, our mechanic said it would be around $650 (US) to replace the timing belt and water pump.
I don't think you need to automatically replace the differential and TC fluids. If they aren't black and there are no shavings (check with a magnetic pickup tool), then I feel that it can stay. That being said, it's not very expensive to do it.
Whenever I buy a vehicle, I flush the coolant and transmission unless the seller can show me it's been done recently. I also check all of the other fluids to determine if they need to be changed.
As for the BMW, it's too bad Qxxx4 isn't closer to me. My brother has a BEAUTIFUL black-on-black 1999 740i for sale for only $9,000 (US). He is dying to get a pickup.