Audi Q3 Brake Discs: Specs, Fitment & Wear Symptoms

On the Q3, what's commonly called "warped discs" is genuinely almost always uneven pad deposits on related models, not physical warping.

Generation covered: this guide is for the third-generation Q3 (F3, 2018–present), with particular focus on 2018–2023 registered examples now old enough for parts to be a common search. Check your logbook or VIN if you're unsure which generation you have.

Illustration for editorial purposes

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OEM Part Number: 3Q0615601A

Genuinely useful technique worth knowing: Audi's own repair documentation ties disc size directly to a two-part brake PR code, found on the vehicle spec sticker (usually under the boot mat or in the service book, second line of box 5) — this tells you the exact size without needing to remove a wheel and measure.

Genuine rear disc reference, current Q3 (300mm, AWD/FWD)	Audi OEM: 3Q0615601A
Front PR codes and sizes	1ZA/1ZC/1ZM/1ZD/1LJ = 312mm. 1ZE/1ZP = 288mm. 1ZF = 280mm. 1ZK/1LK = 345mm (RS Q3)
Rear PR codes and sizes (FWD)	1KD/1KQ = 255mm. 1KE/1KF = 260mm. 1KU/1KZ/1KJ = 286mm
Rear PR codes and sizes (AWD)	1KF = 260mm. 1KJ/1KU = 286mm. 1KW/2EA = 310mm (RS Q3: 312mm)

Audi Q3 Brake Discs: The Part That Pads Depend On

On the Audi Q3, it's a paired system: let either one wear too far and the other suffers for it, which is why so many "just a pad change" jobs end up including discs once a mechanic actually looks.

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.

Audi Q3 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 Q3 typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.

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A Genuinely Useful Piece of Context Worth Knowing About Brake Vibration — Audi Q3 Brake Discs

If you're facing a vibration under braking that's been diagnosed as warped discs, this is genuinely worth knowing: among experienced Audi owners, there's a widely repeated consensus that true disc warping is actually quite rare, with the vibration almost always caused by uneven pad material deposits on the disc surface instead. It's genuinely worth trying braking firmly from around 70mph down to 10mph, repeated several times without letting ABS intervene, to remove this build-up before assuming discs need replacing.

A genuinely alarming, honest account worth knowing about replacement discs: documented cases describe original factory discs lasting tens of thousands of miles without issue, only for a replacement set to develop the exact same vibration within just a few hundred miles, suggesting the fitting process itself can be the genuine cause.

It's also genuinely worth knowing that a dealer refusing warranty cover for a brake disc issue, citing ordinary wear, has in documented cases been overturned by escalating directly to the manufacturer's UK customer service.

Audi Q3 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 Audi Brake Discs

The same part, covered across other Audi models.