I just bought a certified pre-owned 2012 Hyundai Elantra and the rear rotors are only measuring 6 mm. This seems very low so I do not see how it could have passed certification. What is the minimum rear rotor thickness to certify a pre-owned vehicle?
Hello Bethany,
I know a bit about cars but being English I don't understand about rear rotors. I am guessing it is what we call brake discs or disc brakes.
Unlikely I would have thought the actual rotors or discs would be worn to a thickness of 6mm (which would be bad news) and perhaps you are referring to the thickness of the friction material?
It is only a relatively small percentage of braking effort that is exerted by the rear brakes so the rate of wear is much lower than the front brakes so it isn't unusual to discover new friction material isn't much thicker than about 8mm, though many are thicker and some are as thick as those at the front.
It is a general rule that is adopted by most brake and car manufacturer that replacement of friction material or disc pads is not required until there is only 3mm left and I have seen manufacturer's recommendations saying 2mm.
With 6mm of friction material still remaining which is two or three times the recommended minimum there would be no grounds to refuse certification.
Take your car to the service shop and the guy in the greasy overalls will ask himself if 6mm will last you until your next visit and if he is honest he will replace only after asking you what sort of mileage you cover. If he is normal he will grab the extra profit with both hands...
SOURCE: need to change rotors on my car
All your major auto parts stores have web sites that can help you with your project with instructions and diagrams. Also i think chiltons has a web site to.
SOURCE: What is the minimum rear brake rotor thickness for
.331 (In thousandths of an inch) If brake rotor measures at or under this
specification, it must be discarded.That's if you have the V6 and 2WD. IF that's not what you have check here
http://www.autozone.com/autozone/repairinfo/specifications/specificationsMain.jsp?categoryName=BRAKES+%26+TRACTION+CONTROL&childCategoryNameForTitle=Brake+Rotor+Minimal+Machining&appQuestionName=Rear&childCatId=24400232&categoryNameForTitle=Brakes+%26+Traction+Control&appQtext=Rear&categoryNValue=24499999&appQId=4294933443&childCatName=BRAKE+ROTOR+MINIMAL+MACHINING&appIdsArray=#
If that doesn't work got to the autozone website and click repair info then click specification, then brakes and then minimal maching.
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