Aggie95 said:
Looking at a 2013 X3 with 99,409 miles for $10,700. What should I ask about timing belt replacement? What other services at 100k?
Cooling system. All hoses, water pump, radiator and thermostat. BMW cooling systems love to grenade around 100k. I'd also have a PPI done to verify the suspension is good. That's around the time ball joints and other suspension components start to wear out. Driveshaft guibos may also be cracked and need a replacement. 100k tends to be service life for them on BMW IME.
With 100k miles, Service 2 should have been done. I'd check carfax (and if dealer maintained) see if the servicing dealer has the records. There's also services online that will give you the full dealer service history based on vin for a small charge. I find those helpful. It'll be due for a brake fluid change, transmission fluid change, spark plugs, and O2 sensors.
Those are the things that make a $10k BMW become more expensive to maintain than to buy.
I'd also get a code reader than can pull from all of the car's modules so you can figure out more quickly what's going on when the CEL comes on. I maintain my M6 fairly well and have thrown a few random CELs recently. It's a lot less stressful being able to quickly see what the issue is when "reduced engine power" pops up in the cluster.
There's some good aftermarket carplay options available fairly inexpensively if you want to modernize things a bit. You can also do quite a bit of convenience coding on the X3 (windows up/down with remote, auto headlights retain settings, heat/cool seats retain settings, increase number of blinks with comfort blink, etc)
Post up some pics if you go thru with the purchase!