Scion brake rotor and pad kits include four-wheel combinations with separate front and rear components. Ceramic pads can be paired with rotors of different construction and dimensions at each axle. Find your Scion application and compare the positions and contents of each set before ordering.
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OUTScion brake rotor and pad kits can supply both axles in a single purchase. A four-wheel combination includes two rotors and four pads for the front, plus the corresponding parts for the rear. The components differ between those positions, so a full set should be checked as two matching axle groups. Compare the required disc construction, pad configuration and fitting accessories after inspection has established that both ends need friction-part replacement.
Some Scion full combinations pair ceramic pads with cast-iron discs at both axles.
The pad compound and rotor material describe two different working components. Ceramic pads contain a ceramic-based friction formulation bonded to a backing plate; a cast-iron rotor provides the disc surface against which those pads act. That pairing does not make the rotor carbon-ceramic. Read each material description with its named component when comparing kits. The package should also identify the axle coverage and matching parts, allowing you to compare complete combinations without confusing the pad formulation with the disc's material or construction.
A full set can use vented front rotors and solid rear rotors, illustrating why a full set can contain different disc structures.
A vented rotor has two friction faces joined by an internal structure, leaving passages through which air can move. A solid rotor has no comparable internal passage. Drilled holes and slots are features of the outer faces, so they describe something different from venting. Front and rear brakes can use different constructions, and a rear disc can be either solid or vented. Keep the construction specified for each axle when replacing the original components; changing it can alter the required thickness and caliper relationship.
Front and rear rotors can have different outside diameters. A larger rear disc is not a substitute for the front part: diameter must be read with thickness, mounting height and the axle's required brake construction.
Outside diameter is the distance across the rotor's braking surface. It works with the caliper and pad position to place the pad on the intended part of the disc. A front-and-rear package can have different diameters at each axle, so compare both sets of dimensions before ordering. This also explains why a larger rotor is not a simple replacement upgrade: a change in diameter can require other brake components and clearances beyond those provided by an ordinary service kit.
A five-hole rotor arrangement is one part of its attachment specification. The bolt circle, center opening and mounting height must also agree with the required hub and brake assembly. Compare those dimensions together, since two discs with the same number of holes can occupy different positions when installed.
Pad height is one part of the configuration. A full set can have different front and rear dimensions, and each pad also needs the correct backing shape and support points. When comparing Scion brake pads, keep the intended axle and complete brake application attached to those measurements.
Nominal thickness describes a new brake rotor; the minimum thickness is the service limit for the corresponding disc. Measure the installed component against its own limit and inspect both working faces. A front rotor's new thickness should not be used as a rear wear limit or as a prediction of service life.
Pulsation does not establish a single cause. Thickness variation, mounting condition and other mechanical issues can affect how the friction surfaces meet. Use the applicable inspection process to identify the problem before replacing additional components. A different face pattern cannot, by itself, confirm that the cause of the pulsation has been resolved.
New friction material does not establish that a sticking piston, guide or related component now moves correctly. Diagnose the cause of drag or uneven wear and correct the affected component. The friction parts may also require replacement, but they should not be expected to repair the mechanism that caused the problem.
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