Volvo V40 Brake Discs: Specs, Fitment & Wear Symptoms

On the V40, a whole-car vibration under braking has genuinely survived multiple warranty claims across several related Volvo models.

Illustration for editorial purposes

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OEM Part Number: 31341644

Genuinely worth knowing: a real V40 owner directly reported Volvo's own support unable to give a straight answer between three genuine front disc options (278mm, 300mm, 320mm) for the same trim. As a rough guide, the 1.6 D2 typically uses 278mm while the 2.0 D4 uses 320mm — but the sizes are visually distinguishable through the wheel, worth checking directly rather than assuming from engine size alone.

1.6 D2, front discs	278mm diameter, vented, 25mm thickness, 23mm minimum
2.0 D4, front discs, genuine reference	320mm diameter, vented, 25mm thickness, 23mm minimum — Volvo OEM: 31341644 (also referenced as 31400818)
Rear discs, all standard variants, genuine reference	280mm diameter, solid, 11mm thickness — Volvo OEM: 31341645 (also referenced as 31471039)

Volvo V40 Brake Discs: The Part That Pads Depend On

On the Volvo V40, these two components wear together, and letting one go too long accelerates wear on the other, which is why a simple pad swap so often reveals discs that need replacing at the same time.

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.

Volvo V40 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 V40 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 Volvo's Brake History — Volvo V40 Brake Discs

If you're facing a vibration under braking, this is genuinely worth knowing: documented cases across several Volvo models, particularly the XC90, XC60, and S60, describe a strong vibration that persisted through multiple warranty claims, including brakes, engine mounts, and even the propeller shaft.

Worth knowing that non-genuine, aftermarket brake discs have been reported warping almost immediately on related Volvo platforms, in contrast to genuine discs which are considerably less prone to this issue — worth factoring into your decision on parts.

It's also worth knowing a practical, free technique worth trying: accelerating to around 70mph on a clear road and braking firmly a few times can help burn off minor deposits mimicking genuine warping.

Volvo V40 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 Volvo Brake Discs

The same part, covered across other Volvo models.