BMW 5 Series Brake Discs: Specs, Fitment & Wear Symptoms

On the 5 Series, 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

Find BMW 5 Series Brake Discs Here!

Opens live listings in a new tab.

OEM Part Number: 34118831822

Genuinely important to know: on many G30-generation discs, left and right side use genuinely different part numbers (directional, two-piece designs) — ordering a single generic number for both sides can mean receiving two discs for the same side. Always confirm you're ordering a matched left and right pair.

Front disc, base brakes (shared with G02, G05), confirmed left/right specific	BMW OEM: 34118831822 — 348mm diameter, 30mm thickness
Rear disc (shared with F90 M5)	BMW OEM: 34216878179 — 370mm diameter
Right-side ventilated disc, punched holes	BMW OEM: 34106887657
M Sport brakes (S2NHA option), front	348mm diameter, 30mm thickness, 27mm minimum — a genuinely different spec from base brakes despite similar dimensions

BMW 5 Series Brake Discs: The Part That Pads Depend On

On the BMW 5 Series, 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.

BMW 5 Series Brake Discs reference plate

BMW 5 Series 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 5 Series typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.

Find BMW 5 Series Brake Discs Here!

Opens live listings in a new tab.

A Genuinely Important, Honest Clarification Worth Knowing — BMW 5 Series 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.

BMW 5 Series 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 BMW Brake Discs

The same part, covered across other BMW models.