Seat Arona Brake Discs: Specs, Fitment & Wear Symptoms

A genuine owner observation: factory discs replaced at 45-50k miles showed the new ones stayed pit-free 15 months later — suggesting the originals may have used lower-grade steel.

Illustration for editorial purposes

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OEM Part Number: 2Q0615301 (genuine front disc — confirm via VIN) — aftermarket front discs Brembo 09.D571.11 / Bosch 0 986 479 F32

Accuracy note: Covers the Seat Arona (2017-) as listed in the UK aftermarket catalogues. Front brake discs are sold by diameter and thickness, and most models have two or three disc sizes depending on engine, brake size and trim — a 278 mm disc will not fit a car built with 300 mm brakes, so the caliper carrier and the disc must match. The references below are UK aftermarket catalogue listings for this generation, labelled by brand with diameter x thickness in mm; genuine numbers are shown only where a listing quotes one. Measure the old disc or check the brake size against your VIN before ordering, replace discs in pairs with new pads, and scrap any disc at or below its minimum thickness.

Front brake discs (aftermarket)	Brembo 09.D571.11 (276 x 24 mm, vented, 5 holes, coated, high-carbon, min 21 mm, Prime line); ATE 24.0124-0263.1 (275.7 x 24 mm, vented, 5 holes, coated, high-carbon, min 21 mm, inner diameter 136 mm); TRW DF6964 (276 x 24 mm, vented, 5 holes, painted, min 21 mm); Bosch 0 986 479 F32 (256 x 22 mm, vented, 5 holes, coated, high-carbon, min 19 mm, ECE-R90); ATE 24.0122-0312.1 (256 x 22 mm, vented, 5 holes, coated, high-carbon, min 19 mm, inner diameter 134 mm); TRW DF6584 (256 x 22 mm, vented, 5 holes, painted, min 19 mm)
Disc sizes & variants	Two front diameters are listed, both vented 5-hole discs. The 256 x 22 mm disc is the base fitment on the 1.0 TSI 95 and the entry 1.6 TDI, while the 276 x 24 mm disc (quoted as 275.7 mm by ATE) is fitted to the 1.0 TSI 115, 1.5 TSI 150 and 1.6 TDI 115 models and the FR trims.
Genuine (OE) numbers quoted	2Q0615301 (genuine front disc number for this model — confirm via VIN, as several disc sizes exist)
Fitment notes	The more powerful Arona engines and FR models get the 276 mm disc, which wears to 21 mm against 19 mm for the 256 mm disc; none of the listed discs are drilled. Ridex 82B1921 (276 x 24 mm, uncoated) carries a build-date restriction. Ferodo, Textar, Zimmermann and febi are not listed for the front axle, and Delphi BG3034C has no axle position given.

Seat Arona Brake Discs: The Part That Pads Depend On

On the Seat Arona, wear on one of this pair accelerates wear on the other, so a pad change booked as routine maintenance often turns up discs that have quietly deteriorated alongside them.

Before you buy: disc size and design vary by trim, engine size and whether your car has the standard or "sport" brake package. Always confirm against your VIN before ordering.

Seat Arona Brake Discs: Watch: Replacing It

🎬 Watch: Seat Arona brake disc replacement

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Axle not stated in title; alt pads-only front/rear on 2018 Arona: kQ_eY8svGuk.

A Genuine Owner Observation Worth Knowing: Factory Discs vs. Quality Replacements — Seat Arona Brake Discs

A genuinely interesting, specific observation from one documented Arona owner: after replacing the rear discs at around 4.5 years and 45,000-50,000 miles, the new discs showed no sign of wear or pitting even 15 months later — leading the owner to reasonably conclude the original factory-fitted discs may have used lower-grade steel than what's available as a quality aftermarket replacement. This is worth knowing if you're weighing up whether to pay extra for a better-regarded brand when the time comes, rather than assuming a like-for-like replacement with the original specification is automatically the right choice.

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. Unless the discs are below minimum thickness or showing deep grooves or gouges, surface rust alone generally doesn't mean replacement is needed — some dealers use this as an easy upsell, so it's worth getting a second opinion if you're quoted a replacement based on appearance alone.

Seat Arona 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 Arona typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.

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Seat Arona 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.