Warped brake discs are only a symptom. Real question is - why them got warped, as brake discs not designed to get warped and it's only a symptom of some fault
From my experience of work across range of cars (not posing myself as professional mechanic, only diy-er over 15 years of experience ) , real reason why discs ar getting warped, is faulty or incorrectly working brake caliper:
- Stuck caliper guides
-brake caliper piston got stuck (due rust or dirt under rubber sleeve)
- very rear occasions (in 15 years came across only once) wrongly installed bearing, believe or not, but it happend.... after replacing wheel bearing new brake discs, new/ reconditioned caliper , bleed brake system, it stopped destroy brake discs.
What are consequences of getting faulty caliper...
- warped brake discs, causing vibration while braking and (sometimes) driving.
- car getting severely pulled to one side when braking, in very bad cases, it pulls to one side all the time.
- if driving longer period in that condition, it speeds up destroy bushings and joints.
- overheat the hub, cause wheel bearing grease leak, destroys wheel bearing with continuous consequences.
Sorry, about long text, I felt should share my experience and knowledge, might help others.
I do feel open of criticism and if someone want add on something, feel free to add.
Thanks.