Kia Rio Brake Discs: Specs, Fitment & Wear Symptoms

On the Rio, a steel spring joining the caliper halves can genuinely rub against corrosion buildup on hot discs.

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OEM Part Number: 517121G000 (genuine front disc — confirm via VIN) — aftermarket front discs Brembo 09.D227.11 / Bosch 0 986 479 F29

Accuracy note: Covers the Kia Rio (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.D227.11 (256 x 22 mm, vented, 4 holes, coated high-carbon, Prime line, with bolts, min 20 mm); Brembo 09.C174.11 (280 x 22 mm, vented, 4 holes, coated high-carbon, Prime line, with bolts, min 19.4 mm); Bosch 0 986 479 F29 (256 x 22 mm, vented, 4 holes, coated high-carbon, ECE-R90, with bolts, min 20 mm); Bosch 0 986 479 B05 (280 x 22 mm, vented, 4 holes, oiled, ECE-R90, with bolts, min 19.4 mm); ATE 24.0122-0293.1 (256 x 22 mm, vented, 4 holes, coated high-carbon, min 20 mm); febi bilstein 108623 (256 x 22 mm, vented, 4 holes, coated, min 20 mm); Ridex 82B0359 (256 x 22 mm, vented, 4 holes, uncoated cast iron)
Disc sizes & variants	Two front sizes, 256 x 22 mm and 280 x 22 mm, both vented on a 4 x 100 mm PCD with a 62 mm centre bore. The 256 mm disc is the standard fitment and the 280 mm disc is the larger brake on the higher-output 1.0 T-GDi and 1.4 versions.
Genuine (OE) numbers quoted	517121G000 (genuine front disc number for this model — confirm via VIN, as several disc sizes exist)
Fitment notes	Minimum thickness is 20 mm for the 256 mm disc and 19.4 mm for the 280 mm disc. TRW DF6794 (256 mm, min 20 mm), Delphi BG4744C (256 mm), Delphi BG4743C (280 mm) and Ferodo DDF2982C (256 mm) are listed for this model without a stated fitting position. Textar and Zimmermann are not listed.

A Genuinely Detailed, Real Technical Explanation Worth Knowing — Kia Rio Brake Discs

If you're hearing a specific rubbing noise particularly noticeable after heavy braking downhill, this is genuinely worth knowing: a documented case on a related model traced this exact symptom to a steel spring that joins the two halves of the caliper, rubbing against a corrosion buildup at the edge of the disc, worsening as the disc heats up and expands.

A genuinely useful, real maintenance point worth knowing: a full strip-down and clean of the calipers typically isn't included as part of a standard annual service — worth having this done specifically every two to three years, since crud and rust building up in the pad guides can restrict proper movement and lead to uneven wear.

It's also genuinely worth knowing an honest consumer point: already-corroded discs on a genuinely new car can potentially indicate they weren't of merchantable quality, worth pursuing as a warranty claim. It's also worth knowing that a short drive after washing the car helps dry discs out properly.

Kia Rio Brake Discs: Watch: Replacing It

🎬 Watch: Easily Replace Brake Pads and Rotors 2012-2017 Hyundai Accent + Kia Rio (older gen)

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UB Rio; 2017-on YB videos found were pads only

Kia Rio Brake Discs: The Part That Pads Depend On

On the Kia Rio, discs and pads work as a pair, and neglecting one tends to accelerate wear on the other — which is exactly why worn discs so often get discovered during what was meant to be a routine pad change.

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.

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

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Kia Rio 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 Kia Brake Discs

The same part, covered across other Kia models.