Window regulators often break, brake light switches can fail, ignition coils can fail, clutch pedals break where the master cylinder pushrod fits causing the pedal to fall to the floor, the plate behind the door cards which the window regulator attach to have a habit of allowing water to enter the car, main alternator to battery fusebox cables can breakdown causing the battery fuse box to melt (often diagnosed as a faulty alternator due to low voltage at battery) and on some cars, there is a 2 pin multiplug right next to the starter motor which can suffer with broken wires causing the alternator to stop working (again often diagnosed as a faulty alternator).

Just a few common things to be aware of!!