BMW X5 Brake Discs: Specs, Fitment & Wear Symptoms

On the X5, what's commonly called "warped discs" is genuinely almost always uneven pad deposits, since cast iron is genuinely hard to warp.

Illustration for editorial purposes

OEM Part Number: 34206880079

Genuinely important to know: whether M Sport Brakes (option code S2NHA) are fitted genuinely changes which discs are correct — many genuine and aftermarket listings explicitly split by "with" or "without" this specific option, so confirm before ordering rather than assuming by trim name alone.

G05 generation, 30d xDrive, front discs	370mm diameter, vented, 24mm thickness, 22.4mm minimum
sDrive40i/xDrive40i, rear disc	BMW OEM: 34206880079 — 345mm diameter, 24mm thickness (not for M Sport Brakes-equipped cars)
M50i/M50ix, left rear disc	BMW OEM: 34206898493 — 370mm diameter, 24mm thickness
M Performance/M50i, right front disc (punched holes)	BMW OEM: 34106887657 — 395mm diameter, 36mm thickness

The Part That Pads Depend On

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.

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 X5 typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.

A Genuinely Important, Honest Clarification Worth Knowing — BMW X5 Brake Discs

If a vibration under braking has been diagnosed as warped discs, this is genuinely worth knowing: what's commonly described as "warped discs" is, in reality, almost always caused by uneven deposits of pad material on the disc surface, since cast iron itself is genuinely difficult to warp under normal driving conditions.

A genuinely alarming, honest account worth knowing: documented cases describe fast-fit chains replacing "warping" discs under warranty multiple times within less than a year, with owners suspecting the cheapest available parts were being used.

It's also genuinely worth knowing a useful fix worth trying: thoroughly cleaning the mating surfaces between the wheel hub and the disc, or better still fitting new hubs entirely, has been documented resolving this kind of persistent vibration.

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 BMW Brake Discs

The same part, covered across other BMW models.

BMW X5 Brake Discs: Specs, Fitment & Wear Symptoms

OEM Part Number: 34206880079

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A Genuinely Important, Honest Clarification Worth Knowing — BMW X5 Brake Discs