Brake discs are the friction surfaces against which the callipers clamp the pads during every stop, converting kinetic energy into heat across a wide contact area. Ventilated designs, used on the front axles of most family cars, draw air through internal channels to manage that heat; solid discs on lighter rear axles work the same way at lower thermal loads. When a disc wears below its minimum thickness specification — typically marked on the hat or disc edge — it loses the ability to dissipate heat safely, and brake fade becomes a real risk on repeated stops. More visible failure signs include deep circumferential scoring from metal-on-metal contact after pad material has been consumed entirely, or lateral run-out causing a pulsating pedal under braking. Rust lipping at the disc edge is cosmetic on a well-used car, but surface corrosion that extends across the swept zone after prolonged standing is worth addressing promptly. Brembo and TRW supply a large proportion of the original-equipment discs fitted to European cars and publish the OE reference numbers that guarantee correct diameter, thickness, and centre-bore geometry for your specific chassis and variant. Because braking forces are balanced across an axle, discs are almost always replaced in pairs.
Every disc listed on this page carries TecDoc-verified OE numbers linked to specific vehicle configurations. Cross-reference the number against your VIN or use the make-model-engine selector to filter down to your chassis. The disc's diameter, thickness, and bolt pattern are all encoded in the OE reference, so matching it precisely avoids the need to check measurements manually before fitting. If your existing disc has a part number cast into the hat, searching that number directly is the fastest route.
OEM discs are produced to the vehicle manufacturer's own drawings, often by Brembo or TRW, and carry the exact OE reference used at the factory. Quality aftermarket discs from manufacturers like EBC Brakes or A.B.S. are produced to the same dimensional specification and meet the same type-approval standards, though surface finish, coating type, and metallurgy can vary between product lines. Budget discs may use lower-grade cast iron that beds in more slowly and wears faster in demanding conditions.
Industry guidance is to replace discs in axle pairs — both front or both rear at the same time. Even if one disc appears thicker than the other, the metal's internal structure and surface condition will have aged similarly. A single-disc replacement leaves you with mismatched braking forces across the axle until the new disc beds in, which can cause the car to pull under heavy braking. Fitting pads at the same time as discs prevents the sharp edges of worn pads from scoring the new friction surfaces.
A pulsating or vibrating brake pedal under firm application is the most common sign of disc run-out or thickness variation caused by uneven wear. Deep grooves or scoring visible on the face of the disc, a hard vibration through the steering wheel on the front axle, or a car that pulls to one side when stopping all point to worn or damaged discs. A disc worn below its stamped minimum thickness is unsafe regardless of surface appearance and should be replaced before the next journey.
Showing 100 of 29,066 Brake Disc OE numbers. Enter the OE on the main OE search to jump to any reference.
