They are both right, however I havent heard anyone indicating the importance of safety here, even your life or others sharing the road with your vehicle. When replacing brake pads, shocks, rotors,coils,even the calipers,etc these needs to be done as pairs, not just the bad side otherwise your car will drift to one side or pull, unusuall rocking etc. Brake pads should have both left and right replaced at the same time especially if you have ABS. No shop will replace only one side (its dangerious) even if you purchased a brand new rotor, they both should be turned ( surfaced) every manufactor is alittle different in thickness. You can just purchase one rotor but you still should take both rotors to a machine shop and have them surfaced to matching thickness.
You get the idea, when it come to any steering or suspenions parts should not be done half ass, in a crediticle situation when these things come under extreme situation you need them to work correctly, when done half ass you have up the chances of loosing control causing your death or injury to someone else.
Don't forget to use a torque wrench to thighten your lug nuts evenally otherwise your rotor will warp/ causing Brake Pedal Wabble
Other over looked items.
When you over heat your engine, you need to change your motor oil right away, oil never breakdown but the chemicals that protect your engine in the oil has been skorched (burnt) even if you changed it yesterday it must be done otherwise you must just run on vegitable oil (not really), change, Coolent, Thermostst
GOOD LUCK-HOPE THIS HELPS
RK
