Seat Leon Brake Discs: Specs, Fitment & Wear Symptoms
On the Leon, surface rust on rear discs is often genuinely normal — some dealers use it as an easy upsell, so it's worth knowing when replacement is actually necessary.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — front discs (aftermarket) Brembo 09.9145.11 / Bosch 0 986 479 088
| Front brake discs (aftermarket) | Brembo 09.9145.11 (288 x 25 mm, vented, 5 holes, coated, min 22 mm, Prime line); Bosch 0 986 479 088 (288 x 24.9 mm, vented, 9 holes, coated, high-carbon, min 22 mm, ECE-R90); ATE 24.0125-0145.1 (288 x 25 mm, vented, 5 holes, coated, high-carbon, min 22 mm); TRW DF4295 (288 x 25 mm, vented, 9 holes, painted, high-carbon); Brembo 09.9772.11 (312 x 25 mm, vented, 5 holes, coated, high-carbon, min 22 mm, Prime line); Bosch 0 986 479 058 (312 x 25 mm, vented, 9 holes, coated, high-carbon, min 22 mm, ECE-R90); ATE 24.0125-0158.1 (312 x 25 mm, vented, 5 holes, coated, high-carbon, min 22 mm); Brembo 09.C306.1X (340 x 30 mm, drilled and vented, 9 holes, coated, high-carbon, min 27.8 mm, Xtra line) |
|---|---|
| Disc sizes & variants | Four front diameters are listed on the 5 x 112 PCD with a 65 mm centre bore. The 280 x 22 mm disc (Ridex 82B0027) is the base fitment on the 1.0 TSI and 1.2 TSI, the 288 x 25 mm disc covers the 1.4 TSI and 1.6 TDI, the 312 x 25 mm disc is fitted to the 1.8 TSI, 2.0 TDI and FR models, and the 340 x 30 mm disc is the Cupra 280/290/300 fitment. |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine discs against your VIN |
| Fitment notes | Most Leon Mk3 owners need either the 288 mm or 312 mm disc, both of which wear to 22 mm; the Cupra's 340 mm disc wears to 27 mm plain (Brembo 09.C306.11) or 27.8 mm drilled. The drilled Brembo 09.9772.1X (312 mm, min 22.8 mm) is the main sport option. |
Worth Knowing: Surface Rust on Rear Discs Is Often Genuinely Normal — Seat Leon Brake Discs
Worth knowing before assuming a fault: some surface rust or pitting on the rear discs specifically is genuinely normal and expected — rear discs do considerably less braking work than the fronts (commonly cited as only 10-15% of overall braking effort), which is part of why they're smaller and why they tend to stay visibly rustier even on an otherwise healthy car, particularly after driving on wet or salted roads. Unless the discs are below minimum thickness or showing deep grooves or gouges, surface rust alone generally doesn't mean replacement is needed.
If you're experiencing a vibrating steering wheel or pulsing brake pedal, it's also worth knowing this is very often not the disc physically bent from heat at all — it's usually Disc Thickness Variation (DTV), uneven pad material deposits building up unevenly across the surface, which produces the exact same sensation as true warping but can sometimes be resolved without full replacement.
Seat Leon Brake Discs: Watch: Replacing It
5F
Seat Leon Brake Discs: The Part That Pads Depend On
On the Seat Leon, these two components wear together, and letting one go too long accelerates wear on the other, which is why a simple pad swap so often reveals discs that need replacing at the same time.
Seat Leon Brake Discs: What They Do
Brake discs provide the surface the brake pads clamp against to slow the car, converting momentum into heat through friction. Larger, sportier trims of the Leon typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.
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Seat Leon Brake Discs: Wear Symptoms, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Brake Discs Guide for warning signs to watch for, confirming fitment against your VIN, and choosing a reliable aftermarket disc.
More Seat Brake Discs
The same part, covered across other Seat models.